JP6826428B2 - Structural material repair / reinforcement method and repair / reinforcement structure - Google Patents

Description

The present invention relates to a method for repairing / reinforcing a structural material such as a steel material and a repair / reinforcing structure.

The surface of structural materials such as steel, resin, and concrete has reduced plate thickness (thinning) due to local corrosion due to aging and wind and rain, dents and bulges (unevenness) caused by collisions, and finishing of surfaces and steps. Unevenness and deformation (hereinafter collectively referred to as "non-landing") occur due to various factors such as insufficient removal of the weld bead when removing the welded member, and unevenness due to surface treatment to widen the contact area. Sometimes.

The one described in Patent Document 1 is known as an example of a reinforcing method for reinforcing a structural material in which such unevenness occurs.
This reinforcement method is a structure reinforcement method in which a rigid reinforcing material is laminated and adhesively fixed to a rigid structure such as steel or concrete.

That is, this structure reinforcement method is an adhesive-impregnated non-land absorber or adhesive having flexibility that can follow the joint surface even if the joint surface of the structure has non-landing (including distortion, deformation, etc.). The step of stacking the non-landing absorbent on the joint surface, the step of stacking a rigid reinforcing material that cannot follow the non-landing on the outside of the non-land absorbing material, and the step of stacking the non-land absorbing material on the non-adhesive In some cases, a step of impregnating the non-land absorbing material with an adhesive before or after stacking the reinforcing materials, a step of bolting the reinforcing material to the structure by sandwiching the non-land absorbing material, and the above-mentioned The structure and the reinforcing material are brought into close contact with each other by sandwiching the non-land absorbing material by bonding with an adhesive and bolting, and the non-land absorbing material obtained by curing the adhesive and the structure sandwiching the non-land absorbing material It is characterized in that the reinforcing material is integrated.

Japanese Unexamined Patent Publication No. 2013-238024

By the way, it is known that the thicker the adhesive layer, the lower the adhesive strength of the adhesive. This is because the rigidity and strength (mechanical strength) of the adhesive is not so high even if it is cured, and if the adhesive layer becomes thick, the adhesive layer itself cannot withstand the external force and may be destroyed. ..
Therefore, in the above-mentioned conventional reinforcement method, when the non-landing (including distortion, deformation, etc.) becomes large, even if the non-land absorbing material is impregnated with the adhesive to absorb the non-landing, the adhesive layer becomes thick, which is desirable. Adhesive strength (reinforcing effect) may not be obtained.

Therefore, the present inventor thinks that if a fiber-reinforced paste is used instead of the conventional adhesive, the desired rigidity and strength can be obtained even if the unevenness becomes large, as follows. Experiment was conducted.
That is, first, a bolt joint was prepared, and a pair of left and right specimens were joined by the bolt joint.
As shown in FIGS. 6 (b) and 6 (c), the bolt joint 100 is inserted into a pair of upper and lower rectangular plate-shaped backing plates 101 and 101 and two holes provided in the backing plates 101 and 101. It is composed of bolts 102 and 103 and nuts (not shown).
Further, the backing plate 101 is provided with insertion holes 101a and 101b for inserting the bolts 102 and 103.
Two types of test bodies are prepared. As shown in FIG. 6A, one test body 1S has a substantially rectangular plate shape with flat upper and lower surfaces and no damage, and the other test body 2S is rectangular. The plate material 200 and a plurality of round steels 201 having a small diameter protruding from the end surface of the plate material 200 are provided. The round steels 201 are arranged side by side with their axial directions in contact with each other toward the long side direction (tensile direction) of the test piece 2S. Further, the test body 1S is provided with an insertion hole 102a for inserting the bolt 102. Further, in the test body 2S, the round steels 201a (201) and 201a (201) at the center in the parallel arrangement direction are shorter than the other round steels 201, so that the bolt 103 can be inserted.

Since the surface of the test body 2S having the round steel 201 has irregularities formed by the round steel 201, the image is of bolt friction stir welding of a corroded steel plate (steel plate with non-landing material).
The round steel 201 and the backing plate 101 are in line contact with each other, and at the same time, there is almost no mechanical resistance in the direction in which the backing plate 101 slides.
Then, for each of the test bodies 1S and 2S,
(1) When the test pieces are frictionally welded by the backing plates 101 and 101 using only the bolts 102 and 103.
(2) When frictionally welded by the backing plates 101 and 101 using bolts 102 and 103 and a conventional adhesive (amine-based adhesive)
(3) Tensile tests were performed on the cases where the bolts 102 and 103 and the fiber reinforced paste were friction-welded by the backing plates 101 and 101, respectively.
In the cases of (2) and (3), the thicknesses of the adhesive layers are the same.

Further, when performing a tensile test, as shown in FIG. 6B, the test body 2S is joined by abutting the test body 2S and the test body 1S, and the joint portion is sandwiched between the backing plates 101 and 101. At the same time, bolts 102 and 103 are inserted, while for the test piece 1S, as shown in FIG. 6C, the two test pieces 1S and 1S are abutted and joined to each other, and the joint portion is joined to the backing plate 101, It was sandwiched between 101 and bolts 102 and 103 were inserted. As described above, one test body 1S is provided with an insertion hole 102a for inserting the bolt 102, but the other test body 1S is provided with an insertion hole 102a for inserting the bolt 103. A small diameter insertion hole is provided.

The result of the tensile test is shown in FIG. In this figure, the curve of R1 is the one using only bolts in the test body 2S, the curve of R2 is the one using bolts and conventional adhesive in the test body 2S, and the curve of R3 is the one using bolts and fiber reinforced paste in the test body 2S. The relationship between the load and the displacement (interval between test specimens) is shown for each of those using.
The curve of P1 is the one using only bolts in the test body 1S, the curve of P2 is the one using bolts and conventional adhesive in the test body 1S, and the curve of P3 is the one using bolts and fiber reinforced paste in the test body 1S. The relationship between the load and the displacement (interval between test pieces) is shown for each of the above.

As shown in FIG. 7, the tensile strength of the test piece 1S was as follows: conventional adhesive (231 kN)> fiber-reinforced paste (185 kN)> bolt joint only (135 kN).
On the other hand, the tensile strength of the test piece 2S was (115 kN)> conventional adhesive (99 kN)> bolt joint only (89 kN) using the fiber reinforced paste.
As expected, in the test body 2S, it can be seen that the curve of R3 rises sharper than the curves of R2 and R3, and the load value is also high. That is, in the tensile test with the test piece 2S, since the fiber-reinforced paste is superior to the conventional adhesive in terms of rigidity and strength, stress transfer is performed smoothly through the fiber-reinforced paste and the tensile strength is achieved. It can be seen that the strength is high.

However, in the test body 1S, although the curve of P3 rises steeper than the curves of P2 and P3, it can be seen that the curve of P2 has a higher load value than the curve of P3. In other words, in the tensile test with the test piece 1S, the fiber-reinforced paste is superior to the conventional adhesive in terms of rigidity, but inferior in terms of strength, so that stress transfer through the fiber-reinforced paste is performed by the conventional adhesive. It can be seen that the tensile strength is low, although it is performed more smoothly.
As described above, the conventional bonding using an adhesive and a bolt has a large yield strength (rigidity and strength), but if the adhesion of the joint surface is not ensured, the adhesive is broken and sufficient yield strength can be obtained. On the other hand, it was found that the bonding using fiber reinforced paste and bolts can obtain higher yield strength (high rigidity, high strength) than before.

The present invention has been made based on the above findings, and provides a method for repairing / reinforcing a structural material and a repair / reinforcing structure capable of reliably repairing or reinforcing a target portion that requires repair or reinforcement of the structural material. The purpose is.

In order to achieve the above object, the structural material repair / reinforcement method of the present invention is a structural material repair / reinforcement method for repairing or reinforcing a target portion that requires repair or reinforcement of the structural material. ,
A coating step of applying the fiber reinforced paste to at least a part of the structural material including the target portion, and
The reinforcing plate installation process of installing the reinforcing plate on the structural material so as to be overlapped with the applied fiber reinforced paste, and
It is characterized by including a pressurizing step of pressurizing the installed reinforcing plate toward the structural material by a pressurizing member.

Further, the structural material repair / reinforcement structure of the present invention is a structural material repair / reinforcement structure for repairing or reinforcing a target portion that requires repair or reinforcement of the structural material.
A fiber-reinforced paste applied to at least a part of the structural material including the target portion,
A reinforcing plate installed on the structural material so as to be layered on the fiber reinforced paste,
It is characterized by including a pressurizing member that pressurizes the reinforcing plate toward the structural material.

In the present invention, a reinforcing plate is installed on the structural material so as to be overlapped with the fiber reinforced paste applied to at least a part of the structural material including the target portion that needs to be repaired or reinforced, and the reinforcing plate is added. Since the pressure member pressurizes the structural material, the fiber-reinforced paste is surely adhered to the target portion. Since this fiber-reinforced paste has higher rigidity and strength (mechanical strength) than conventional adhesives, stress is smoothly transmitted to the reinforcing plate through the fiber-reinforced paste, and the target portion can be reliably repaired or reinforced. ..
Further, since stress is smoothly transmitted to the reinforcing plate through the fiber-reinforced paste, the structural material can be sufficiently reinforced even when the structural material is partially defective as the target portion.

In the configuration of the present invention, when the structural material is surface-treated, it is preferable to include a removing step of removing the surface treatment from the structural material around the target portion before the coating step. ..

According to such a configuration, the surface treatment applied to the structural material is removed from the steel material around the target portion before the coating process, so that the applied fiber-reinforced paste is surely adhered to the periphery of the target portion. .. Therefore, the target portion can be repaired or reinforced more reliably.

Further, in the configuration of the present invention, when the target portion is a crack, it is preferable to provide a stop hole at the end of the crack before the coating step to suppress the crack growth.

According to such a configuration, even when the structural material is chipped in a crack shape and the end portion of the defective portion is sharp, a stop hole is formed at the end portion of the defective portion of the structural material, and the defective portion is formed. By relaxing the stress concentration at the end, crack growth can be suppressed.

Further, in the configuration of the present invention, the structural material is a steel plate-shaped member.
The target portion is located on at least one surface of both sides of the plate-shaped member.
In the coating step, the fiber reinforced paste is applied to at least a part of the surface of the plate-shaped member including the target portion.
In the reinforcing plate installation step, the reinforcing plate is installed on the plate-shaped member so as to be overlapped with the applied fiber-reinforced paste.
In the pressurizing step, it is preferable that the reinforcing plate is pressurized toward the plate-shaped member by the pressurizing member.

According to such a configuration, the reinforcing plate is installed on the plate-shaped member so as to be overlapped with the fiber-reinforced paste applied to at least a part of the surface of the plate-shaped member including the target portion, and the reinforcing plate is pressurized. Since the member pressurizes the plate-shaped member, the fiber-reinforced paste is surely adhered to the joint. Since this fiber-reinforced paste has higher rigidity and strength (mechanical strength) than the conventional adhesive, stress is smoothly transmitted to the reinforcing plate through the fiber-reinforced paste, and the joint can be reliably reinforced.

Further, in the above-mentioned configuration of the present invention, a stacking step of further stacking one or more of the following reinforcing plates on the reinforcing plate,
A paste application step of applying the fiber-reinforced paste to the reinforcing plates on the stacking side is provided so that the fiber-reinforced paste is interposed between the reinforcing plates adjacent to each other in the stacking direction.
In the stacking step, the reinforcing plates on the side closer to the plate-shaped member are stacked so that the reinforcing plates are projected from the other reinforcing plates in the length direction of the plate-shaped member.
In the pressurizing step, a pressurizing member may be provided at each end of the stacked reinforcing plates, and each of the reinforcing plates may be pressurized toward the plate-shaped member by the pressurizing member.

According to such a configuration, one or more of the following reinforcing plates are further stacked on the reinforcing plate, and the reinforcing plates on the stacked side are fiber-reinforced so that the fiber-reinforced paste is interposed between the reinforcing plates adjacent to each other in the stacking direction. Since the paste is applied and the stacked reinforcing plates are pressed toward the plate-shaped member by another pressing member, the target portion can be reinforced more firmly while making the reinforcing plate thinner.
That is, when a conventional adhesive is used instead of the fiber-reinforced paste, it is necessary to make the adhesive layer as thin as possible in order to firmly reinforce the target portion. However, by using the fiber-reinforced paste, the fiber is concerned. Even if the adhesive layer made of the reinforcing paste is thicker than that made of the conventional adhesive, its rigidity and strength are higher than those of the conventional adhesive, so that the reinforcing plate becomes thinner and even when used in multiple stages, the space between the reinforcing plates is used. The target portion can be reinforced more firmly without having to control the thickness of the adhesive layer.
In addition, the reinforcing plates on the side closer to the plate-shaped member are stacked so that the reinforcing plates protrude from the other reinforcing plates in the length direction of the plate-shaped members, and the pressure members are attached to the ends of the stacked reinforcing plates. Since each reinforcing plate is pressed toward the plate-shaped member by the pressurizing member, each reinforcing plate can be easily and surely pressurized. When a single thick reinforcing plate is used in this way, it is difficult to construct a heavy reinforcing plate at the site, but if it can be divided into thin reinforcing plates, the construction becomes easier. .. For example, in the repair and reinforcement work of an existing structure in which such a joint is particularly effective for corrosion damage, it may be difficult to use a crane, so reduction of the construction unit weight is very useful.

Further, in the above-mentioned configuration of the present invention, in the pressurizing step, the reinforcing plate is temporarily pressed by the pressurizing member in order from the reinforcing plate on the side closer to the plate-shaped member among the plurality of stacked reinforcing plates. After tightening, it is preferable that the reinforcing plate is finally tightened by the pressure member in order from the reinforcing plate on the side farther from the plate-shaped member.

Here, temporary tightening means tightening the reinforcing plate by applying pressure to the extent that it does not fall off from the plate-shaped member, and final tightening means tightening the reinforcing plate from the strength of the pressure member, the reinforcing plate, and the target structure. It means pressurizing to a predetermined rated load and then pressurizing and tightening so that the layer thickness of the fiber reinforced paste becomes a predetermined value.

According to such a configuration, by temporarily tightening the reinforcing plate, the reinforcing plate can be held in the target portion so as not to fall off from the plate-shaped member during construction, and then the reinforcing plate is fully tightened to reinforce the fibers. It is possible to correct the distortion of the reinforcing plate while letting the paste escape to the end side of the reinforcing plate, and also to the fiber reinforced paste between the reinforcing plate and the plate-shaped member and the fiber reinforced paste between the reinforcing plates. The layer thickness of the fiber-reinforced paste can be maintained at a desired value by applying pressure reliably and in a well-balanced manner. In addition, the deformation caused by the Poisson ratio due to pressurization does not cause unexpected deformation of the target structure.

Further, in the configuration of the present invention, it is preferable that the pressurizing member is a vise or a bolt / nut.
Further, when the pressure member is a vise, it is preferable to measure the stress generated in the vise and adjust the pressing force by the vise according to the measured stress.
In this case, for example, the stress generated in the main body portion that connects the pair of pressing portions that pressurize the reinforcing plate in the vise may be measured, and the pressing force by the vise may be adjusted according to the measured stress. ..

According to such a configuration, the following effects are obtained.
That is, when the pressure member is a vise, the generated stress can be monitored by attaching a strain gauge or the like to the vise, and when relaxation or shrinkage of the fiber reinforced paste occurs, the vise is tightened. By doing so, the pressing force can be managed. Further, unlike bolts and nuts, it is not necessary to form bolt insertion holes in the reinforcing plate or plate-shaped member, so that the labor for forming bolt insertion holes can be saved, and the adhesive surface caused by the bolt insertion holes can be saved. There is no area reduction or cross-section loss. Increasing the area of the bonded surface results in increased yield strength as a joint.
In addition, when the pressurizing member is a bolt or nut, it is smaller than a vise, so it can be used even in a narrow part, and when repairing or reinforcing a web of H-shaped steel where it is difficult to apply a vise. It can be easily used for such purposes.
Further, when the pressurizing member is a vise, the stress generated in the main body portion that connects the pair of pressing portions that pressurize the reinforcing plate in the vise is measured, and the vise is adjusted according to the measured stress. By making it possible to adjust the pressing force by the force, the stress acting on the vise can be monitored regularly or constantly. Therefore, for example, when the pressing force on the reinforcing member becomes insufficient over time, the pressing force by the vise can be increased, and the necessary repair or reinforcing state of the structural material can be stably maintained. ..

Further, in the configuration of the present invention, a vise and bolts / nuts may be used in combination as the pressurizing member.
According to such a configuration, for example, when repairing or reinforcing a web such as I-shaped steel or H-shaped steel, a vise may not reach, but in this case, repair or reinforcement can be performed by using bolts. The scope of application can be expanded and the total cost can be reduced.

Further, in the configuration of the present invention, after using a vise as the pressurizing member, bolts and nuts may be used instead of the vise after the fact. In this case, after removing the vise from the structural material, bolt holes may be constructed on-site and the vise may be replaced with bolts and nuts one by one.
According to such a configuration, the removed vise can be reused after using the bolts and nuts instead of the vise after the fact. In addition, the absolute amount of tightening force (pressurizing force) increases and stabilizes when bolts and nuts are used compared to a vise.

In the configuration of the present invention, the fiber-reinforced paste is a resin composition containing a room temperature curable thermosetting resin and a filler.
The resin composition contains both a fibrous filler and a non-spherical particle filler as the filler, has a viscosity of 5 to 2000 Pa · s at 25 ° C., and has a viscosity with respect to 100 parts by weight of a room temperature curable thermosetting resin. The fibrous filler and the non-spherical particle filler are prepared by the following formula (1).
Amount of non-spherical particle filler / Amount of fibrous filler = 1-10 ... (1)
It is desirable that the total particle size is 20 to 150 parts by weight and the average particle size of the non-spherical particle filler is 1 to 80 μm.

According to such a configuration, a predetermined resin composition containing a room temperature curable thermosetting resin and a filler is used as a fiber reinforced paste to repair or reinforce the structural material by a method that reduces the work load during construction. It is possible to repair or reinforce the target portion in which the above is required, and to suppress the growth of cracks in the defective portion of the structural material. In addition, various types of structural materials can be repaired or reinforced by variously changing the thickness and shape of the fiber-reinforced paste to be applied to realize a flexible design of the cross-sectional area and the adhesive area of the target portion. ..

According to the present invention, it is possible to reliably repair or reinforce a target portion that requires repair or reinforcement of a structural material.

An example of the repair / reinforcement structure of the structural material according to the first embodiment of the present invention is shown, where (a) is a side sectional view, (b) is a cross-sectional view, and (c) is on the surface of the structural material. It is a side sectional view which shows the repair state when a corroded part occurs. An example of the repair / reinforcement structure of the structural material according to the second embodiment of the present invention is shown, where (a) is a side sectional view and (b) is a cross-sectional view. It is a process drawing of the repair / reinforcement method of the structural material which concerns on 3rd Embodiment of this invention, (a) is the sectional view which shows the state which applied the fiber-reinforced paste to the plate-shaped member, (b) is one sheet. A cross-sectional view showing a state in which the reinforcing plates of the eyes are stacked, (d) is a cross-sectional view showing a state in which the second reinforcing plate is stacked, and (c) is a cross-sectional view showing a state in which the third reinforcing plate is stacked. is there. An example of the repair / reinforcement structure of the structural material according to the fourth embodiment of the present invention is shown, where (a) is a side view, (b) is a front view, (c) is a bottom view, and (d) is a bottom view. It is an enlarged view of the X circle part in (b). An example of the repair / reinforcement structure of the structural material according to the fifth embodiment of the present invention is shown, (a) is a side view, (b) is a front view, (c) is a bottom view, and (d). Is an enlarged view of the Y-circle portion in (b). The purpose is to explain an experimental example in which a pair of left and right test bodies are joined by a bolt joint. FIG. 1A is a perspective view showing two test bodies, and (b) and (c) are joints of a pair of test bodies, respectively. It is a perspective view which shows the state which was done. It is a graph which shows the experimental result about the repair / reinforcement method of a structural material.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First Embodiment)
FIG. 1 shows an example of a repair / reinforcement structure of a structural material according to the first embodiment, (a) is a side sectional view, and (b) is a cross-sectional view.
The present embodiment is an embodiment when the method for repairing and reinforcing a structural material according to the present invention is applied to a method for reinforcing a joint portion of a steel plate-shaped member such as a flange portion of an H-shaped steel. .. Therefore, in the present embodiment, the structural material is a steel plate-shaped member, and the target portion that needs to be repaired or reinforced is a joint portion of the plate-shaped member.

As shown in FIG. 1, the repair / reinforcement structure of the structural material of the present embodiment includes the joint portion 2 of the plate-shaped members 1 and 1 to be joined, and has both sides (upper and lower sides) of the plate-shaped members 1 and 1. The upper and lower fiber-reinforced pastes 3 and 3, which are partially applied, and the upper and lower fiber-reinforced pastes 3 and 3 which are placed on the plate-shaped members 1 and 1 so as to cover the fiber-reinforced pastes 3 and 3 are overlapped with each other. Reinforcing plates 4 and 4 and a pressing member 5 that pressurizes the reinforcing plates 4 and 4 toward the plate-shaped members 1 and 1 are provided.

The fiber-reinforced paste 3 is a resin composition containing a room temperature curable thermosetting resin and a filler, and details will be described later.
The reinforcing plate 4 is, for example, a splice plate made of a steel plate. The width of the reinforcing plate 4 is substantially equal to or slightly smaller than the width of the plate-shaped member 1.

Next, a method of repairing / reinforcing the structural material according to the present embodiment will be described.
First, when the plate-shaped members 1 and 1 are subjected to surface treatment such as plating or painting, the surface treatment from the surface of the plate-shaped members 1 and 1 is performed around the joint portion 2 in the pre-stage of the next coating step. (Layer) is removed (removal step).
When removing the surface treatment, for example, by using a shot blast or a disc grinder, the surface of the plate-shaped members 1 and 1 around the joint portion 2 of the plate-shaped members 1 and 1 is subjected to a base treatment, and the plate-shaped members 1 and 1 are subjected to a base treatment. Remove the plating or coating provided as the surface treatment of 1 and 1. As a result, the surfaces of the plate-shaped members 1 and 1 are exposed. The part other than this exposed area is the area where the surface treatment is not removed, that is, the area covered with plating or painting.

Here, when removing the surface treatment, it is ideal that it is completely removed in the entire exposure range, but it is actually impossible and it is very difficult to confirm. is there. For example, "Ryuichi Yokota, Ken Fujii, Hisaichi Horii, Yuya Hidekuma" Effect of residual rust on partial strength recovery of corroded steel sheets using adhesives "Abstracts of the 71st Annual Scientific Lecture Meeting of the Civil Engineering Society, In "I-439, 2016", it is confirmed in the experiment of the adhesive joint that there is no change in the strength of the joint if 75% of the surface treatment of the adhesive surface is removed. For this reason, it is sufficient if it can be visually confirmed that the surface treatment in the exposed range has been largely removed, and there is a case where fine punctate surface treatment remains on the edge of the weld bead that is difficult to remove. However, it can be equated with the one from which the plating or coating provided as the surface treatment has been removed.

Next, the fiber-reinforced paste 3 is applied to a part of both sides of the plate-shaped members 1 and 1 including the joint portion 2 on the plate-shaped members 1 and 1 having an exposed surface by a brush or a spatula (coating step).
When the fiber-reinforced paste 3 is applied, the coating amount is adjusted so that the thickness of the adhesive layer formed by the fiber-reinforced paste 3 is about 1 to 30 mm, but the thickness of the adhesive layer may be less than 1 mm. .. Basically, the thinner the adhesive layer, the stronger the adhesive strength, but the adhesive layer formed by the fiber-reinforced paste 3 can secure sufficient rigidity and strength (mechanical characteristics) even if it is about 1 to 30 mm.

Further, in the coating step, if necessary, anticorrosion and waterproof treatment may be performed by providing a waterproofing tape or other protective material around the coating range to which the fiber reinforced paste 3 is applied. Durability can be improved by performing anticorrosion and waterproof treatment around the fiber-reinforced paste and the coating range in this way.

Next, the reinforcing plates 4 are installed on the upper and lower surfaces of the plate-shaped members 1 and 1 so as to be overlapped with the applied fiber-reinforced paste 3. At this time, the upper and lower reinforcing plates 4 and 4 of the plate-shaped members 1 and 1 are installed so as to straddle the joint portion 2 (reinforcing plate installation step).
Since bolt insertion holes 14 and 11 for inserting bolts 5a, which will be described later, which form a part of the pressurizing member 5, are formed in the reinforcing plates 4 and 4 and the plate-shaped member 1, respectively, the bolts of the reinforcing plate 4 The reinforcing plate 4 is installed on the surface of the plate-shaped member 1 so that the insertion hole 14 and the bolt insertion hole 11 of the plate-shaped member 1 are coaxially aligned with each other.

Next, the installed reinforcing plate 4 is pressed by the pressurizing member 5 toward the plate-shaped member 1 perpendicularly to the reinforcing plate 4 (pressurizing step).
In the present embodiment, the pressurizing member 5 includes a bolt 5a and a nut 5b. Then, the bolt 5a is passed through the bolt insertion holes 14, 11, and 14 of one reinforcing plate 4, the plate-shaped member 1, and the other reinforcing plate 4, and the plate-shaped member 1 and the other are reinforced from the one reinforcing plate 4. After inserting it so as to penetrate the plate 4, the nut 5b is screwed into the tip of the bolt 5a and tightened.

In the present embodiment, two bolts 5a are arranged on one plate-shaped member 1 to be joined and two bolts 5a are arranged on the other plate-shaped member 1 in a straight line at predetermined intervals, and nuts 5b are screwed into each bolt 5a. Temporarily tighten by lightly tightening, and then perform final tightening by tightening each nut 5b with the rated load. When performing final tightening, care should be taken so that the thickness of the adhesive layer formed by the fiber reinforced paste 3 does not exceed 30 mm. Further, as in the present embodiment, when the pressurizing members 5 are provided at two or more locations in the material axial direction of each plate-shaped member 1, when the pressurizing members 5 are finally tightened, each of the reinforcing plates 4 and the like is provided. In order to release the deformation of the member and suppress the influence of the deformation as much as possible, it is preferable to perform final tightening from the pressure member 5 located near the opposite end side of the plate-shaped members 1 and 1. ..
When the plate-shaped member 1 is a flange of H-shaped steel, for example, the bolts 5a may be arranged in one row on each side of the flange with the web sandwiched at predetermined intervals.

Next, the fiber reinforced paste 3 will be described.
The fiber-reinforced paste 3 has a viscosity of 5 to 2000 Pa · s at 25 ° C. at room temperature before curing. The fiber-reinforced paste 3 is preferably in a state of a viscosity of 50 to 2000 Pa · s at 25 ° C. Since the viscosity of the fiber-reinforced paste 3 is within the above range, the resin composition applied at the time of coating can appropriately change its shape, and at the same time, it takes a certain amount of time for the resin composition to lose its shape. , Easy to mold. The fiber-reinforced paste 3 may have a viscosity at 25 ° C. higher than 2000 Pa · s, has no fluidity, and the viscosity cannot be measured, as long as the purpose is not deviated from this purpose. Further, the fiber-reinforced paste 3 may have a viscosity of 5 to 2000 Pa · s at 25 ° C. by thickening the paste before curing.

[Room temperature curable thermosetting resin]
As the room temperature curable thermosetting resin according to the fiber reinforced paste 3, a thermosetting resin capable of room temperature curing is used. Examples of this thermosetting resin include epoxy resin, polyurethane resin, acrylic resin, polyester resin and the like. This thermosetting resin is not particularly limited as long as it satisfies the conditions such as the adhesiveness of the coated surface and the strength of the cured product, but is an epoxy resin from the viewpoint of the adhesiveness to the surface of the structural material and the strength of the cured product. Is preferably used.

This epoxy resin is liquid, and a compound having two or more epoxy groups in one molecule is preferable. The epoxy resin may be, for example, a glycidyl ether type epoxy resin obtained from a polyol, a glycidyl amine type epoxy resin obtained from an amine having a plurality of active hydrogens, a glycidyl ester type epoxy resin obtained from a polycarboxylic acid, or a plurality of glycidyl ester type epoxy resins in the molecule. Polyepoxydo or the like obtained by oxidizing a compound having a double bond is used. Examples of the epoxy resin include bisphenol type epoxy resin such as bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol AD type epoxy resin, and bisphenol S type epoxy resin, epoxy resin having a biphenyl skeleton, and epoxy having a naphthalene skeleton. Resin, epoxy resin with dicyclopentadiene skeleton, phenol novolac type epoxy resin, novolac type epoxy resin such as cresol novolac type epoxy resin, triglycidyl-p-aminophenol, N, N, N', N'-tetraglycidyl- Glycidylamine type epoxy resins such as 4,4'-methylenedianiline, resorcindiglycidyl ether, triglycidyl isocyanurate and the like can be mentioned, but in terms of performance and economy, bisphenol A type, bisphenol F type, bisphenol AD type and the like can be mentioned. , A bifunctional or higher liquid epoxy resin such as a cresol novolac type glycidyl ether type epoxy resin is preferable.

The fiber-reinforced paste 3 is, for example, a two-component type in which a curing agent is mixed with an epoxy resin before construction, and the viscosity immediately after mixing the main agent and the curing agent is 5 to 2000 Pa · s at 25 ° C. At this time, the viscosity of the thermosetting resin as the main agent is preferably in the range of 0.5 to 30 Pa · s at 25 ° C., and more preferably 0.7 to 20 Pa · s. If the viscosity is less than 0.5 Pa · s, there is a problem that the fiber-reinforced paste 3 tends to drip during coating and the required strength cannot be obtained. Further, if the viscosity is more than 30 Pa · s, it becomes difficult to knead the filler, and the fiber reinforced paste 3 has a problem that the viscosity is too high, which makes coating difficult. The viscosity of the fiber-reinforced paste 3 can be measured according to the viscosity test method of JIS K 7233 epoxy resin and curing agent.

When the fiber-reinforced paste 3 is used as a mixture of a main agent and a curing agent, the curing agent is not particularly limited as long as it can be cured at room temperature, such as an acid anhydride type or an amine type. An amine-based curing agent is preferable in consideration of the pot life and the environment in which it is used. Examples of the amine-based curing agent include aliphatic polyamines such as diethylenetriamine, alicyclic polyamines such as isophoronediamine, aromatic amines such as diaminodiphenolsulphon, and modified products thereof. As the amine-based curing agent, a liquid aliphatic polyamine having a viscosity in the range of 0.01 to 2 Pa · s and a modified product thereof can be cured at room temperature for a short time and can be easily mixed at the time of implementation. , Can be preferably used. The blending ratio of the curing agent is not particularly limited, but those having an amine value such that the ratio of the curing agent is 20 to 100 parts with respect to 100 parts equivalent of the epoxy resin as the main agent are preferable.

In order to obtain a sufficient tensile elastic modulus to suppress crack growth in a coating type, we examined the optimum compounding ratio of fibrous filler and non-spherical particle filler for room temperature curable thermosetting resin. did. When the blending ratio of these fillers is optimized, the viscosity of the obtained resin composition is increased, so that not only the effect of strengthening the resin composition after blending can be obtained, but also in terms of construction such as prevention of sagging during coating. The merit of is also obtained.

[Fibrous filler]
As the fibrous filler according to the fiber-reinforced paste 3, organic fibers composed of carbon fibers, glass fibers, inorganic fibers such as rock wool fibers, and polymers can be used, and a mixture thereof can also be used. Carbon fibers and glass fibers, or mixtures thereof, are more preferred in terms of handling during production. Further, as a fibrous filler related to the fiber-reinforced paste 3, the chopped carbon fiber and glass fiber having a length of 3 mm or more and a fiber diameter of less than 30 μm per fiber are more preferable in terms of the development of tensile elastic modulus. Strand fibers can be used. Although the fibrous filler related to the fiber-reinforced paste 3 is not limited, this fibrous filler may be subjected to sizing treatment such as epoxy resin sizing or silane coupling in order to improve the affinity with the matrix material. Those that have been surface-treated with an agent or the like are preferable.

[Non-spherical particle filler]
As the non-spherical particle filler related to the fiber-reinforced paste 3, pitch coke crushed product, talc, mica, clay, calcium carbonate, carbon black, graphite crushed product, wallastnite, crushed silica powder, resin-based fine particles and the like can be used. , These mixtures can also be used. As the non-spherical particle filler related to the fiber-reinforced paste 3, since the particle shape of the non-spherical particle filler such as pitch coke crushed product, talc, mica, etc. is scaly, the tensile elastic modulus required for the fiber-reinforced paste 3 can be determined. It is preferable because it is easily expressed. The non-spherical particle filler according to the fiber-reinforced paste 3 is more preferably scaly, has a high elastic modulus of its own, and has excellent compatibility with a resin composition composed of carbon-based elements. It is a product. In particular, pitch coke crushed products made from coal-based tar and having acicular crystalline properties have high strength and elastic modulus of crushed particles, and most of their compositions are carbon, so that they are different from those of other inorganic fillers. Unlike this, it is possible to obtain strength and elastic modulus without using a compatibilizer or the like, and it easily becomes scaly at the time of pulverization. Is.

The non-spherical particle filler used in the fiber-reinforced paste 3 has an average particle diameter of 1 to 80 μm, preferably 1 to 50 μm, more preferably 1 to 30 μm, and even more preferably an average particle diameter of 5 to 20 μm. Is. A non-spherical filler having an average particle size of less than 1 μm is not preferable because it makes coating difficult because it significantly increases the viscosity when mixed with a thermosetting resin mixture. Further, a non-spherical filler having an average particle diameter of more than 80 μm is not preferable because the strength of the thermosetting resin mixture cannot be obtained. The average particle size of the non-spherical particle filler in the fiber-reinforced paste 3 is the median diameter (D50) of the non-spherical particle filler measured by a laser diffraction / scattering type particle size distribution measuring device.

[Filler content]
The fiber-reinforced paste 3 contains a total of 20 to 150 parts by weight of the fibrous filler and the non-spherical particle filler with respect to 100 parts by weight of the room temperature curable thermosetting resin, preferably 40 to 120 parts by weight. It is mixed with. If the blending amount of the fibrous filler and the non-spherical particle filler is less than 20 parts by weight with respect to 100 parts by weight of the thermosetting resin that cures at room temperature, the tensile elastic modulus for obtaining the reinforcing effect cannot be obtained. In addition, when the blending amount is more than 150 parts by weight, the voids generated in the resin composition increase, so that the strength of the fiber-reinforced paste 3 itself is lowered.

Further, in the fiber-reinforced paste 3, the blending ratio of the fibrous filler and the non-spherical particle filler blended in the room temperature curable thermosetting resin is 1 to 10 in the following formula (1), more preferably 2 to 8. To be. If the compounding ratio is less than 1, a sufficient tensile elastic modulus for obtaining the reinforcing effect cannot be obtained, and if the compounding ratio exceeds 10, not only a sufficient tensile elastic modulus for obtaining the reinforcing effect, but also Tensile strength cannot be obtained either.

Amount of non-spherical particle filler / Amount of fibrous filler = 1-10 ... (1)

In the fiber-reinforced paste 3, the blending ratio of the thermosetting resin with the fibrous filler and the non-spherical particle filler is 3 to 30 parts by weight of the fibrous filler and the non-spherical particle filler with respect to 100 parts by weight of the thermosetting resin. Is preferably 10 to 120 parts by weight, more preferably 5 to 20 parts by weight of the fibrous filler and 20 to 100 parts by weight of the non-spherical particle filler. If the blending amount of the fibrous filler and the non-spherical particle filler is within this range, there will be no problem in construction or mechanical properties such as elastic modulus and strength obtained, but in particular, the above formula (1) It can be designed according to the compounding ratio, and the effect of suppressing crack growth can be enhanced.

As one of the embodiments of the fiber reinforced plastic 3, the chopped fibrous filler and the non-spherical particle filler are mixed with a thermosetting resin that can be cured at room temperature, so that the material can be cured at room temperature without using an adhesive or the like. We have realized a fiber-reinforced paste 3 that can be easily applied to vertical portions and can exhibit a tensile elastic modulus that suppresses the growth of cracks generated in the structural material.

Further, as long as the physical properties of the fiber-reinforced paste 3 are not impaired, a thermosetting resin other than the thermosetting resin used for the matrix resin, an inorganic filler, and an organic filler are mixed in combination, and further, for improving dispersibility and adhesiveness. Additives such as a silane coupling agent, an ultraviolet inhibitor, a thermal deterioration inhibitor, an antioxidant, and a flow conditioner may be mixed in combination.

The fiber-reinforced paste 3 may be a two-component resin composition in which a thermosetting resin (main agent) and a curing agent are separately provided and the operator mixes both immediately before the work. By using a two-component resin composition, a highly reactive curing agent can be used, which enables short-time construction on site, and also because the main agent and curing agent are stored separately. It can be stored for a long period of time without any particular restrictions on the conditions, and construction can be carried out promptly as needed.

Although the fiber-reinforced paste 3 is not limited, it is preferable to use a mixer such as a general helical mixer, a Henschel mixer, a Dalton type mixer, or a centrifuge mixer in the production of the fiber-reinforced paste 3. It is more preferable to reduce the pressure in these mixings because the bubbles contained in the mixture can be removed.

Further, although the fiber reinforced paste 3 is not limited, it is preferable to mix the resin and the curing agent immediately before the coating work in the fiber reinforced paste 3 in order to facilitate the coating work at the outdoor construction site. ..
For example, for the fiber-reinforced paste 3, a mixture of a base resin varnish or a curing agent mixed with a fibrous and particulate filler in advance is prepared, and a required amount of the main resin varnish or a curing agent is added to the mixture immediately before the coating operation. It is preferable to mix and use.
At that time, the mixture prepared in advance may be a mixture of the main agent, the fibrous filler and the particulate filler, one of the fillers is mixed with the main agent, and the other filler is mixed with the curing agent to be used. It may be a method of preparing things. Considering the convenience at the time of construction, it is preferable to prepare a mixed varnish in which the main resin varnish, the fibrous filler and the particulate filler are mixed, and mix the curing agent immediately before the coating work.

On the other hand, a method of preparing a mixed curing agent in which a curing agent, a fibrous filler and a non-spherical particle filler are mixed and mixing the main resin varnish immediately before the coating work is also preferably used, but the main mixture has a high viscosity. The method of adding the one having a lower viscosity is more preferable because it has better handleability. The mixing method at the construction site is not particularly limited, but a method of mixing with a drum can-mounted mixer or a handy type mixer is preferable from the viewpoint of simplicity and less work load during construction. An example of a drum-mounted mixer is Maazel made by Seiken, and an example of a handy type mixer is a handy type Maazel made by Otsuka Brush.

The fiber-reinforced paste 3 is not limited, but the mixture of the main resin varnish and the curing agent has a viscosity of 5 to 2000 Pa · s at 25 ° C., and more preferably 50 to 2000 Pa · s at 25 ° C. 2000 Pa · s is preferable for facilitating coating on walls, ceilings, and the like. Therefore, in terms of preventing dripping during coating and handling, the viscosity immediately after mixing is preferably 10 to 2000 Pa · s at 25 ° C., more preferably 30 to 1500 Pa · s, and 50 to 1000 Pa · s. -S is more preferable. Further, as long as this purpose is not deviated, the mixture may have a viscosity higher than 2000 Pa · s, have no fluidity, and the viscosity cannot be measured.

The fiber-reinforced paste 3 may have thixotropy (sway denaturation) due to the property of being a resin composition containing a thermosetting resin and a filler. Although the fiber reinforced paste 3 is not limited, the thixotropic index of medium-viscosity thixotropy (sway modification) in the standard JIS A 6024: 2008 for building repair epoxy resin is 5 ± 1. The fiber-reinforced paste 3 may exhibit a thixotropic index of 4 or more, preferably 5 or more in the measurement according to the same standard. When the thixotropic index is in the above range, the fiber-reinforced paste 3 does not easily lose its shape during coating, and coating / molding becomes easy. The curing time of the fiber-reinforced paste 3 is preferably about 10 minutes to 5 hours, more preferably about 30 minutes to 3 hours in terms of construction work. In addition, as an easy method for confirming a good curing state, a change in thickness 2 hours after applying the mixture immediately after mixing the main resin varnish and the curing agent to a thickness of 20 mm with respect to the horizontal plane is observed. It is preferably cured within 2 mm.

Although this invention is not limited, if the humidity condition at the time of construction is extremely high, the surface of the uncured composition molded or coated after mixing should be protected with sheets to take measures against moisture absorption. Is desirable. These sheets may be the same as those used as food-proof materials to be applied or attached to the gaps in the exposed range where the structural material is exposed for the purpose of corrosion protection. For this food-proof material, for example, it is preferable to use a silicone adhesive sheet for construction / civil engineering manufactured by Shin-Etsu Chemical Co., Ltd., Shin-Etsu Patch Seal HNS-200, or the like.

Although the fiber-reinforced paste 3 is not limited, the fiber-reinforced paste 3 preferably has a tensile shear strength of 1 MPa or more, which indicates adhesiveness to the general structural material rolled steel SS400, for example. Even if the tensile shear strength is less than this, it does not cause a particularly significant problem, but it may be better in terms of long-term durability and the like if peeling after coating is less likely to occur.

[Coating method]
The method for applying the fiber-reinforced paste 3 is not particularly limited as long as it can apply a material having a viscosity of 5 to 2000 Pa · s at 25 ° C., and a generally used method can be used. When the fiber-reinforced paste 3 has a defect portion in the vicinity of the joint portion 2 of the plate-shaped member 1, the fiber-reinforced paste 3 is applied so as to cover the defect portion and hardened, thereby exhibiting a crack growth suppressing effect. The thickness to be applied is not particularly limited as long as it can be applied and sufficient strength is maintained after curing. When the fiber-reinforced paste 3 is applied to the defect portion with a thickness of 1 mm or more, about 30 mm or less, preferably about 10 mm to 20 mm, the effect of suppressing crack growth is high. As the curing method, normal temperature curing is possible, but if necessary, a generally used method such as heating can be used. When applying the fiber reinforced paste 3, a primer may be used to improve the adhesion. The type of the primer is appropriately selected depending on the material of the structural material to be reinforced and the resin type of the fiber reinforced paste 3, and examples thereof include an epoxy resin-based primer and a silane coupling agent-based primer.

As described above, according to the present embodiment, the reinforcing plate 4 is overlapped with the fiber reinforced paste 3 applied to a part of the plate-shaped member 1 including the joint portion 2 that needs to be reinforced. In order to install the reinforcing plate 4 in 1 and pressurize the reinforcing plate 4 by the pressurizing member (bolt 5a and nut 5b) 5 toward the plate-shaped member 1 perpendicularly to the reinforcing plate 4, the fiber reinforced paste 3 is applied to the joint portion 2. Securely adheres to. Since the fiber-reinforced paste 3 has higher rigidity and strength (mechanical strength) than the conventional adhesive, stress is smoothly transmitted to the reinforcing plate 4 through the fiber-reinforced paste 3, and the joint portion 2 is reliably reinforced. it can.
Further, since stress is smoothly transmitted to the reinforcing plate 4 through the fiber reinforced paste 3, the structural material can be sufficiently reinforced even when a partial defect occurs in the plate-shaped member 1.

Further, when the plate-shaped member 1 is surface-treated, the surface treatment is removed from the plate-shaped member 1 around the joint portion 2 before the coating step of applying the fiber-reinforced paste 3, so that the plate-shaped member 1 is coated. The fiber-reinforced paste 3 is surely adhered to the periphery of the joint portion 2. Therefore, the joint portion 2 can be reinforced more reliably.

In the present embodiment, the present invention has been described by taking as an example the case where the joint portion 2 of the plate-shaped members 1 and 1 is reinforced, but the present invention is not limited to this.
For example, as shown in FIG. 1 (c), at least a part of the plate-shaped member 1 and other structural materials has a decrease in plate thickness (thinning) or a defect due to local corrosion due to aging or wind and rain. If it occurs (the thinned part and the defective part are collectively referred to as the corroded part 1d), the fiber reinforced paste 3, the reinforcing plate 4, and the pressure are applied to the corroded part 1d as the target parts that need to be repaired or reinforced. The member 5 may be used for repair or reinforcement.
In this case, if the corroded portion 1d is generated on one of the two surfaces of the plate-shaped member, the one surface is repaired or repaired by using the fiber reinforced paste 3, the reinforcing plate 4, and the pressure member 5. It should be reinforced. That is, the fiber reinforced paste 3 is applied to one surface of the plate-shaped member, the reinforcing plate 4 is provided so as to be overlapped with the fiber reinforced paste 3, and the pressure is applied by the pressure member 5, while the other of the plate-shaped members. It is not necessary to provide the reinforcing plate 4 on the surface of the.

If the target part that needs to be repaired or reinforced is a crack, a stop hole that suppresses crack growth is drilled at the end of the crack before the coating process. Install using a machine) or a drill. By providing a stop hole at the end of the defective portion of the structural material in this way to alleviate the stress concentration at the end of the defective portion, the growth of cracks can be suppressed. Further, by attaching a strain gauge or the like to this stop hole, the generated stress can be monitored.

(Second Embodiment)
2A and 2B show an example of a repair / reinforcement structure of a structural material according to a second embodiment, where FIG. 2A is a side sectional view and FIG. 2B is a cross sectional view.
The difference between this embodiment and the first embodiment described above is that a vise 50 is used as the pressurizing member 5 instead of the bolt 5a and the nut 5b. Therefore, this point will be described below. The same reference numerals are given to the parts common to the first embodiment, and the description thereof will be omitted or simplified.

As shown in FIG. 2, the vise 50 includes a substantially U-shaped main body portion 51 and a pair of pressing portions 54a and 54b provided at both ends of the main body portion 51.
More specifically, the bolt portion 53 screwed into the female screw formed in the hole of the cylindrical tubular portion 52 provided at one end of the main body 51 and the bolt portion 53 at one end of the bolt portion 53. It includes a pressing portion 54b provided and a pressing portion 54a provided at the other end of the main body 51. Further, a lever 55 is provided at the other end of the bolt portion 53 so as to penetrate the bolt portion 53.
Further, in the present embodiment, it is possible to measure the stress generated in the main body 51 of the vise 50 and adjust the pressing force by the vise according to the measured stress. That is, a strain gauge 56 is attached to the main body 51, and this strain gauge can be connected to a strain measuring instrument (not shown). As a result, the stress generated in the main body 51 (actually, strain in the case of the present embodiment) can be measured periodically or constantly, and the pressing force can be monitored. Therefore, for example, when the pressing force on the reinforcing plates 4 and 4 changes with time and the pressing force becomes insufficient (or excessive), the pressing force by the vise 50 is increased by the measured stress. Since the pressing force can be adjusted by reducing the pressure, the necessary repair or reinforcement state of the structural material (plate-shaped member 1) can be stably maintained.

Such a vise 50 is arranged so as to sandwich the upper and lower reinforcing plates 4 and 4 arranged so as to sandwich the fiber reinforced pastes 3 and 3 in the plate-shaped member 1.
That is, one pressing portion 54a of the vise 50 is in contact with one (upper) reinforcing plate 4, and the other pressing portion 54b is in contact with the other (lower) reinforcing plate 4, and then the lever 55 is gripped. By rotating the bolt portion 53 in the tightening direction, the reinforcing plates 4 and 4 are pressed vertically toward the plate-shaped member 1 by the pressing portions 54a and 54b, thereby exerting a predetermined pressure on the reinforcing plates 4 and 4. Sandwich with.
The vise 50 is provided in the same number as the positions where the bolts 5a and nuts 5b are provided. Further, as in the case of the bolt 5a and the nut 5b, the temporary tightening is performed and then the final tightening is performed. When performing final tightening, care should be taken so that the thickness of the individual adhesive layers formed by the fiber-reinforced paste 3 does not exceed 30 mm.

According to the present embodiment, the same effect as that of the first embodiment can be obtained, and unlike the bolt 5a and the nut 5b, it is not necessary to form the bolt insertion hole in the reinforcing plate 4 or the plate-shaped member 1. Therefore, it is possible to obtain the effect that the area of the adhesive surface is not reduced due to the bolt insertion hole and the cross-sectional defect does not occur.
Further, by connecting the strain gauge 56 attached to the vise 50 to a strain measuring instrument (not shown) at regular intervals or at all times, the generated stress of the vise 50 can be monitored, and for example, relaxation and shrinkage of the fiber-reinforced paste 3 can be performed. It is possible to manage the pressing force, such as tightening the vise 50 when a problem occurs.

(Third Embodiment)
FIG. 3 is a process diagram showing an example of a method for repairing / reinforcing the structural material according to the third embodiment.
In the present embodiment, the joint portion 2 of the plate-shaped members 1 and 1 is reinforced by using a vise 50 as in the second embodiment, but the next reinforcing plate is further reinforced on the reinforcing plate 4. Two pieces of 4 are stacked (stacking process). The reinforcement method of this embodiment will be described below.

First, as shown in FIG. 4A, when the plate-shaped members 1 and 1 are subjected to surface treatment such as plating or painting, from the surface of the plate-shaped members 1 and 1 around the joint portion 2. The surface of the plate-shaped members 1 and 1 is exposed by removing the surface treatment (layer) (removal step).
Next, the fiber-reinforced paste 3 is applied to a part of both sides of the plate-shaped members 1 and 1 including the joint portion 2 on the plate-shaped members 1 and 1 having an exposed surface (paste application step).
When the fiber-reinforced paste 3 is applied, the coating amount is adjusted so that the thickness of the adhesive layer formed by the fiber-reinforced paste 3 is about 1 to 30 mm, but the thickness of the adhesive layer may be less than 1 mm. .. Basically, the thinner the adhesive layer, the stronger the adhesive strength, but the adhesive layer formed by the fiber-reinforced paste 3 can secure sufficient rigidity and strength (mechanical strength) even if it is about 1 to 30 mm.

Next, the first reinforcing plate 4a is installed on the upper and lower surfaces of the plate-shaped members 1 and 1 so as to be overlapped with the applied fiber-reinforced paste 3 so as to straddle the joint portion 2 (reinforcing plate installation step). .. The reinforcing plate 4a and the reinforcing plates 4b and 4c described later are thinner than the reinforcing plate 4 used in the second embodiment.
Next, the installed reinforcing plates 4a and 4a are pressurized toward the plate-shaped member 1 using the above-mentioned vise 50 (pressurizing step). Vise 50s are provided at both ends of the reinforcing plates 4a and 4a in the length direction (horizontal direction in FIG. 3), respectively, to pressurize the reinforcing plates 4a and 4a. In this pressurizing step, the reinforcing plates 4a and 4a pressurize the reinforcing plates 4a and 4a with a pressure that does not cause them to fall off from the plate-shaped member 1, that is, the reinforcing plates 4a and 4a are temporarily tightened.
In FIGS. 3A to 3D, only the pressing portions 54a and 54b of the vise 50 are described, and the other members (bolt portion 53, lever 55, etc.) are omitted.

Next, as shown in FIG. 3C, after applying the fiber-reinforced pastes 3 and 3 to the surfaces of the reinforcing plates 4a and 4a (paste coating step), the second reinforcing plates 4b are applied to the reinforcing plates 4a and 4a. , 4b are stacked (stacking process). The reinforcing plate 4b has the same thickness as the reinforcing plate 4a, but is shorter in the left-right direction than the reinforcing plate 4a, and protrudes from the reinforcing plate 4a in the length direction of the plate-shaped member 1 (left-right direction in FIG. 3). The reinforcing plates 4a are stacked with the fiber reinforced paste 3 interposed therebetween. To put it the other way around, the reinforcing plate 4a protrudes from the reinforcing plate 4b in the length direction of the plate-shaped member.

Next, the installed reinforcing plates 4b and 4b are pressurized toward the plate-shaped member 1 by using the above-mentioned vise 50 (pressurizing step). Vise 50s are provided at both ends of the reinforcing plates 4b and 4b in the length direction to pressurize the reinforcing plates 4b and 4b, respectively. Also in this pressurizing step, the reinforcing plates 4b and 4b pressurize the reinforcing plates 4b and 4b with a pressure that does not cause the reinforcing plates 4b and 4b to fall off from the plate-shaped member 1, that is, the reinforcing plates 4b and 4b are temporarily tightened.

Next, as shown in FIG. 3D, after applying the fiber-reinforced pastes 3 and 3 to the surfaces of the reinforcing plates 4b and 4b (paste coating step), the third reinforcing plates 4c are applied to the reinforcing plates 4b and 4b. , 4c are stacked (stacking process). The reinforcing plate 4c has the same thickness as the reinforcing plates 4a and 4b, but the length in the left-right direction is shorter than that of the reinforcing plate 4b, and the length direction of the plate-shaped member 1 is shorter than that of the reinforcing plate 4b (left-right direction in FIG. 3). The reinforcing plates 4b are stacked with the fiber reinforced paste 3 interposed therebetween so as not to protrude into the reinforcing plate 4b. To put it the other way around, the reinforcing plate 4b protrudes from the reinforcing plate 4c in the length direction of the plate-shaped member.

Next, the installed reinforcing plates 4c and 4c are pressurized toward the plate-shaped member 1 using the above-mentioned vise 50 (pressurization step). Vise 50s are provided at both ends of the reinforcing plates 4c and 4c in the length direction, respectively, to pressurize the reinforcing plates 4c and 4c. Also in this pressurizing step, the reinforcing plates 4c and 4c pressurize the reinforcing plates 4c and 4c with a pressure that does not cause the reinforcing plates 4c and 4c to fall off from the plate-shaped member 1, that is, the reinforcing plates 4c and 4c are temporarily tightened.

With respect to the three reinforcing plates 4a to 4c stacked in this way, the reinforcing plate 4a, the reinforcing plate 4b, and the reinforcing plate 4c are arranged in this order from the reinforcing plate on the side closer to the plate-shaped member 1 by the vise 50. After temporarily tightening the reinforcing plates 4a to 4c, the reinforcing plates 4a to 4c are arranged in the order of the reinforcing plate far from the plate-shaped member 1, that is, the reinforcing plate 4c, the reinforcing plate 4b, and the reinforcing plate 4a by a vise 50. Fully tighten. In the final tightening, the vise 50 is tightened with the rated load, but in this case, care is taken so that the thickness of each adhesive layer formed by the fiber reinforced paste 3 does not exceed 30 mm.

According to the present embodiment, the same effects as those of the first and second embodiments can be obtained, and the following effects can be obtained.
That is, the next reinforcing plates 4b, 4c are further stacked on the reinforcing plate 4a, and the side to be stacked so that the fiber reinforced paste 3 is interposed between the reinforcing plates 4a, 4b (4b, 4c) adjacent to each other in the stacking direction. The fiber reinforced paste 3 is applied to the reinforcing plates 4a and 4b of the above, and the stacked reinforcing plates 4b and 4c are pressed toward the plate-shaped member 1 by another vise 50, so that the reinforcing plates 4a to 4c are thinned. , The joint portion 2 can be reinforced more firmly.
That is, when a conventional adhesive is used instead of the fiber-reinforced paste 3, in order to firmly reinforce the joint portion 2, it is necessary to make the adhesive layer as thin as possible and thicken the reinforcing plate. By using the paste 3, even if the adhesive layer made of the fiber-reinforced paste 3 is thicker than that of the conventional adhesive, its rigidity and strength are higher than those of the conventional adhesive, so that the reinforcing plates 4a to 4c are made thinner. At the same time, the joint portion 2 can be reinforced more firmly.
Further, the reinforcing plates 4a to 4c are stacked so that the reinforcing plate closer to the plate-shaped member 1 projects from the other reinforcing plates in the length direction of the plate-shaped member 1, and the stacked reinforcing plates 4a to 4c are stacked. Since a vise 50 is provided at each end and the reinforcing plates 4a to 4c are pressed toward the plate-shaped member 1 by the vise 50, the respective reinforcing plates 4a to 4c can be easily and surely pressed.

Further, in the pressurizing step, of the three stacked reinforcing plates 4a to 4c, the reinforcing plates 4a to 4c are temporarily tightened by a vise 50 in order from the reinforcing plate closer to the plate-shaped member 1. Since the reinforcing plates 4a to 4c were fully tightened by the vise 50 in order from the reinforcing plates 4a to 4c on the side farther from the plate-shaped member 1, the reinforcing plates 4a to 4c were temporarily tightened from the plate-shaped member 1 to the joint portion 2. It can be held so as not to fall off, and by the subsequent final tightening, the fiber reinforced paste 3 can be released to the end side of the reinforcing plates 4a to 4c to correct the distortion of the reinforcing plates 4a to 4c, and the reinforcing plates can be corrected. A reliable and well-balanced pressure is applied to the fiber-reinforced paste 3 between the 4a and the plate-shaped member 1 and the fiber-reinforced paste 3 between the reinforcing plates 4a, 4b (4b, 4c) to increase the layer thickness of the fiber-reinforced paste 3. It can be held at a desired value.

In the present embodiment, the three reinforcing plates 4a to 4c are stacked, but the number of stacked reinforcing plates may be appropriately set.
Further, in the above-described first to third embodiments, the present invention has been described by taking as an example the case where the joint portion 2 of the plate-shaped members 1 and 1 is reinforced, but the present invention is not limited to this.
For example, if at least a part of the structural material other than the plate-shaped member has a decrease in plate thickness (thickness reduction) or a defect due to local corrosion due to aging or wind and rain, the thickness reduction or defect portion occurs. As a target portion that needs to be repaired or reinforced, the fiber reinforced paste 3, the reinforcing plate 4, and the pressure members 5, 50 may be used to repair or reinforce. Further, the structural material is not limited to a steel material, and may be made of other metals, hard resins, concrete, or a composite material thereof. Further, the portion that needs repair and reinforcement is not limited to a flat surface but may be a curved surface.

(Fourth Embodiment)
FIG. 4 is a diagram for explaining a method of repairing / reinforcing the structural material according to the fourth embodiment. The present embodiment is an example in which the method for repairing / reinforcing a structural material according to the present invention is applied as a repair method for repairing a fatigue crack when a fatigue crack occurs in the web of the I-section steel. Therefore, in the present embodiment, the structural material is a web of I-section steel, and the target portion requiring repair or reinforcement is a fatigue crack generated in the web.
In the present embodiment, as shown in FIG. 4A, a horizontal plate 61 such as a gusset is joined to the lower end of the web 1A of the I-shaped steel by welding or the like, and the horizontal plate 61 and the web 1A are joined to the lower end. At the end of the joint, the fatigue crack K1 extends substantially vertically on the web 1A.

When repairing such a fatigue crack K1, a plurality of (for example, four) reinforcing plates 41a to 41d are stacked on the lower end surface of the web 1A on the side where the fatigue crack K1 is generated (stacking step). In this case, the reinforcing plates 41a to 41d are stacked so as to include both ends of the fatigue crack K1. The pair of upper and lower reinforcing plates 41a to 41d are arranged and stacked so as to face in the lateral direction (horizontal direction in FIG. 4A) and sandwich the horizontal plates 61 vertically. The reinforcing plates 41a to 41d are arranged so that the end portion of the fatigue crack K1 is located substantially at the center of the reinforcing plates 41a to 41d in the longitudinal direction.

Further, when repairing the fatigue crack K1, the cross-sectional integral lost due to the fatigue crack K1 may be compensated by the reinforcing plates 41a to 41d, so that the entire fatigue crack K1 does not need to be covered with the reinforcing plates 41a to 41d. Good. Further, it is efficient to repair both ends of the fatigue crack K1 in terms of suppressing the spread of the fatigue crack K1.

When the reinforcing plates 41a to 41d are stacked, the same procedure as in the third embodiment described above is performed. As will be described later, when the reinforcing plates 41a to 41d are pressed toward the web 1A, unlike the third embodiment, the bolts 5a and the nuts 5b are used.
First, when the web 1A is subjected to surface treatment such as plating or painting, the surface treatment (layer) is removed (removed step) from the surface of the web 1A around the fatigue crack K1 to remove the surface treatment (layer) of the web 1A. To expose the surface of.
Next, the fiber-reinforced paste is applied to a part of the surface of the web 1A including both ends of the fatigue crack K1 on the web 1A whose surface is exposed (paste application step). In this case, the fiber-reinforced paste may or may not be applied to the fatigue crack K1.
Next, the first reinforcing plate 41a is installed on the surface of the web 1A so as to be overlapped with the applied fiber-reinforced paste so as to straddle the end portion of the fatigue crack K1 (reinforcing plate installation step). The reinforcing plates 41a and the reinforcing plates 41b to 41d are thinner than the reinforcing plates 4 used in the second embodiment.

Next, the installed reinforcing plate 41a is pressurized toward the web 1A by using the bolts 5a and nuts 5b described above (pressurization step). Bolts 5a and nuts 5b are provided at both ends of the reinforcing plate 41a in the length direction (left-right direction in FIGS. 4A and 4C) to pressurize the reinforcing plate 41a. In this pressurizing step, the reinforcing plate 41a pressurizes the reinforcing plate 41a with a pressure that does not cause the reinforcing plate 41a to fall off from the web 1A, that is, the reinforcing plate 41a is temporarily tightened.

Next, after applying the fiber reinforced paste to the surface of the reinforcing plate 41a (paste coating step), the second reinforcing plate 41b is stacked on the reinforcing plate 41a (stacking step). The reinforcing plate 41b has the same thickness as the reinforcing plate 41a, but the length in the left-right direction is shorter than that of the reinforcing plate 41a, and the width direction of the web 1A is shorter than that of the reinforcing plate 41a (left and right in FIGS. 4A and 4C). The reinforcing plates 41a are stacked with the fiber reinforced paste interposed therebetween so as not to protrude in the direction). To put it the other way around, the reinforcing plate 41a protrudes from the reinforcing plate 41b in the width direction of the web 1A.

Next, the installed reinforcing plate 41b is pressurized toward the web 1A by using the bolts 5a and nuts 5b described above (pressurization step). Bolts 5a and nuts 5b are provided at both ends of the reinforcing plate 41b in the length direction to pressurize the reinforcing plate 41b. Also in this pressurizing step, the reinforcing plate 41b pressurizes the reinforcing plate 41b with a pressure that does not cause the reinforcing plate 41b to fall off from the web 1A, that is, the reinforcing plate 41b is temporarily tightened.
In the same manner, the reinforcing plates 41c and 41d are sequentially stacked on the reinforcing plates 41b, and the fiber reinforced paste is interposed between the reinforcing plates 41b, 41c, 41c, 41d adjacent to each other in the stacking direction. The fiber reinforced paste is applied to the reinforcing plates 41b and 41c on the side to be stacked. Further, the reinforcing plates 41b and 41b are temporarily tightened using the bolts 5a and the nuts 5b.

With respect to the four reinforcing plates 41a to 41d stacked in this way, the bolts 5a and nuts are arranged in the order of the reinforcing plates on the side closer to the web 1A, that is, the reinforcing plates 41a, the reinforcing plates 41b, the reinforcing plates 41c, and 41d. After the reinforcing plates 41a to 41d are temporarily tightened by 5b, the bolts 5a and the nuts 5b are sequentially tightened in the order of the reinforcing plates far from the web 1A, that is, the reinforcing plates 41d, the reinforcing plates 41c, the reinforcing plates 41b, and the reinforcing plates 41a. The reinforcing plates 41a to 41d are finally tightened. In the final tightening, the bolts 5a and nuts 5b are tightened with the rated load, but in this case, care is taken so that the thickness of the adhesive layer formed by the fiber reinforced paste does not exceed 30 mm.

According to the present embodiment, the fatigue crack K1 generated in the web 1A can be reliably repaired, and the same effect as that of the third embodiment can be obtained.
In the present embodiment, the reinforcing plates 41a to 41d are stacked on the surface of the web 1A on the side where the fatigue crack K1 is generated, but the reinforcing plates 41a to 41d are similarly stacked on the other surface of the web 1A. It may be stacked.

(Fifth Embodiment)
FIG. 5 is a diagram for explaining a method of repairing / reinforcing the structural material according to the fifth embodiment. The present embodiment is an example in which the method for repairing / reinforcing a structural material according to the present invention is applied as a repair method for repairing a fatigue crack when a fatigue crack occurs in a flange of an I-shaped steel. Therefore, in the present embodiment, the structural material is a flange of I-shaped steel, and the target portion that needs to be repaired or reinforced is a fatigue crack generated in the flange.
In the present embodiment, as shown in FIG. 5C, a horizontal plate 62 such as a gusset is joined to the edge of the flange 1B of the I-shaped steel along the longitudinal direction by welding or the like. At the end of the joint between 62 and the flange 1B, a fatigue crack K2 is formed in the flange 1B so as to extend substantially perpendicular to the long side of the flange 1B.

When repairing such a fatigue crack K2, the repair is basically performed in the same manner as the method for repairing the fatigue crack K1 generated in the web 1B described above, but the difference from the fourth embodiment is that the repair is performed. The four reinforcing plates 42a to 42d are stacked on the surface of the flange 1B so as to sandwich the flange 1B from above and below, and a vise 50 is used to pressurize the reinforcing plates 42a to 42d. ..
The reinforcing plates 42a to 42d are longer than the reinforcing plates 41a to 41d in the fourth embodiment.
Further, the fatigue crack K2 penetrates the flange 1B in the thickness direction. For this reason, fatigue cracks K2 appear on both the upper and lower surfaces of the flange 1B.

Similar to the fourth embodiment, a plurality of (for example, four) reinforcing plates 42a to 42d are stacked on the upper and lower surfaces of the flange 1B, respectively (stacking step). In this case, the reinforcing plates 42a to 42d are stacked so as to include almost the entire fatigue crack K2. The pair of upper and lower reinforcing plates 42a to 42d are oriented in the lateral direction (horizontal direction in FIG. 5A), and the horizontal plate 62 is located substantially at the center of the reinforcing plates 42a to 42d in FIG. 5A. And stack.

When the reinforcing plates 42a to 42d are stacked, the same procedure as in the fourth embodiment described above is performed. As will be described later, when the reinforcing plates 42a to 42d are pressed toward the flange 1B, unlike the fourth embodiment, a vise 50 is used.
That is, first, when the flange 1B is subjected to surface treatment such as plating or painting, the flange is first removed (removed step) from the surface of the flange 1B around the fatigue crack K2. The surface of 1B is exposed.
Next, the fiber-reinforced paste is applied to a part of the surface of the flange 1B including almost the entire fatigue crack K2 on the flange 1B whose surface is exposed (paste application step). In this case, the fiber-reinforced paste may or may not be applied to the fatigue crack K2.
Next, the first reinforcing plate 42a is installed on both sides of the flange 1B so as to be overlapped with the applied fiber-reinforced paste so as to straddle the fatigue crack K2 (reinforcing plate installation step). The reinforcing plates 42a and the reinforcing plates 42b to 42d are thinner than the reinforcing plates 4 used in the second embodiment.

Next, the installed reinforcing plates 42a and 42a are sandwiched by the above-mentioned vise 50 and pressed toward the flange 1B (pressurization step). The vise 50 is provided at both ends of the reinforcing plate 42a in the length direction (left-right direction in FIGS. 5A and 5C) to pressurize the reinforcing plate 42a. In this pressurizing step, the reinforcing plate 42a pressurizes the reinforcing plate 42a with a pressure that does not cause the reinforcing plate 42a to fall off from the flange 1B, that is, the reinforcing plate 42a is temporarily tightened.

Next, after applying the fiber reinforced paste to the surfaces of the reinforcing plates 42a and 42a (paste coating step), the second reinforcing plates 42b and 42b are stacked on the reinforcing plates 41a and 41a (stacking step).
Next, the installed reinforcing plates 42b and 42b are sandwiched by a vise 50 and pressed toward the flange 1B (pressurization step). Vise 50s are provided at both ends of the reinforcing plate 41b in the length direction to pressurize the reinforcing plate 42b. Also in this pressurizing step, the reinforcing plate 42b pressurizes the reinforcing plate 42b with a pressure that does not cause the reinforcing plate 42b to fall off from the flange 1B, that is, the reinforcing plate 42b is temporarily tightened.
Similarly, the reinforcing plates 42c, 42c and the reinforcing plates 42d, 42d are sequentially stacked on the reinforcing plates 42b, 42b, and the fiber reinforced paste is formed between the reinforcing plates 42b, 42c, 42c, 42d adjacent to each other in the stacking direction. The fiber reinforced paste is applied to the reinforcing plates 42b and 42c on the side to be stacked so as to intervene. Further, the reinforcing plates 42c, 42c and the reinforcing plates 42d, 42d are temporarily tightened using the vise 50.

With respect to the four reinforcing plates 42a to 42d stacked in this way, the reinforcing plates 42a, the reinforcing plates 42b, the reinforcing plates 42c, and 42d are arranged in this order from the reinforcing plate on the side closer to the flange 1B by the vise 50. After temporarily tightening the reinforcing plates 42a to 42d, the reinforcing plate 42a is applied in the order of the reinforcing plate far from the flange 1B, that is, the reinforcing plate 42d, the reinforcing plate 42c, the reinforcing plate 42b, and the reinforcing plate 42a by the vise 50. Fully tighten ~ 42d. In the final tightening, the vise 50 is tightened with the rated load, but in this case, care is taken so that the thickness of the adhesive layer formed by the fiber reinforced paste does not exceed 30 mm.

A strain gauge (not shown) is attached to the vise 50 to periodically or constantly measure the stress generated in the vise 50 (actually, strain in the case of this embodiment) to monitor the pressing force. Do. Therefore, for example, when the pressing force on the reinforcing plates 42a to 42d changes with time and the pressing force becomes insufficient (or excessive), the pressing force by the vise 50 is increased by the measured stress. Since the pressing force can be adjusted by reducing the pressure, the necessary repair of the flange 1B can be stably maintained.

According to the present embodiment, the fatigue crack K2 generated in the flange 1B can be reliably repaired, and the same effect as that of the fourth embodiment can be obtained.
In the present embodiment, the stacked reinforcing plates 42a to 42d are arranged so as to sandwich the flange 1B, but the reinforcing plates 42a are placed on one surface of the flange 1B depending on the occurrence of fatigue crack K2 and the like. ~ 42d may be stacked.

Further, in the first to fifth embodiments, the bolt 5a / nut 5b or the vise 50 is used properly for the pressurizing member 5, but the pressurizing member 5 uses the bolt 5a / nut 5b and the vise. You may use it together with 50.
In this way, by using the bolt 5a / nut 5b and the vise 50 together, the vise may not reach, for example, when repairing or reinforcing the web of I-shaped steel or H-shaped steel. In this case, by using bolts, the applicable range of repair or reinforcement can be expanded and the total cost can be reduced.

Further, after using the vise 50 as the pressurizing member 5, bolts 5a and nuts 5b may be used instead of the vise 50 after the fact. In this case, after removing the vise 50 from the structural material, bolt holes can be locally constructed and the vise 50 can be replaced with bolts 5a and nuts 5b one by one.
In this way, after the fact, the bolt 5a and the nut 5b can be used instead of the vise 50, and then the removed vise can be reused. Further, the absolute amount of the tightening force (pressurizing force) increases and stabilizes when the bolt 5a and the nut 5b are used as compared with the vise 50.

1 Plate-shaped member (structural material)
1A web (structural material)
1B flange (structural material)
2 Joint (target part)
3 Fiber reinforced paste 4 Reinforcing plate 4a-4c Reinforcing plate 5 Pressurizing member 5a Bolt (pressurizing member)
5b nut (pressurizing member)
500,000 vise (pressurized member)
41a to 41d Reinforcing plate 42a to 42d Reinforcing plate K1, K2 Fatigue crack (target part)

Claims (12)

It is a method of repairing / reinforcing a structural material for repairing or reinforcing a target part that requires repair or reinforcement of the structural material.
A coating step of applying the fiber reinforced paste to at least a part of the structural material including the target portion, and
The reinforcing plate installation process of installing the reinforcing plate on the structural material so as to be overlapped with the applied fiber reinforced paste, and
It is provided with a pressurizing step of pressurizing the installed reinforcing plate toward the structural material by a pressurizing member .
A method for repairing and reinforcing a structural material, wherein the fiber-reinforced paste is a resin composition containing a room temperature curable thermosetting resin and a fibrous filler . The first aspect of claim 1, wherein when the structural material is subjected to a surface treatment, a removal step of removing the surface treatment from the structural material is provided around the target portion before the coating step. How to repair and reinforce structural materials. The structural material according to claim 1 or 2, wherein when the target portion is a crack, a stop hole for suppressing crack growth is provided at the end of the crack before the coating step. Repair / reinforcement method. The structural material is a steel plate-shaped member.
The target portion is located on at least one surface of both sides of the plate-shaped member.
In the coating step, the fiber reinforced paste is applied to at least a part of the surface of the plate-shaped member including the target portion.
In the reinforcing plate installation step, the reinforcing plate is installed on the plate-shaped member so as to be overlapped with the applied fiber-reinforced paste.
The method for repairing / reinforcing a structural material according to claim 1 or 2, wherein in the pressurizing step, the reinforcing plate is pressurized toward the plate-shaped member by the pressurizing member. A stacking process in which one or more of the following reinforcing plates are further stacked on the reinforcing plate,
A paste application step of applying the fiber-reinforced paste to the reinforcing plates on the stacking side is provided so that the fiber-reinforced paste is interposed between the reinforcing plates adjacent to each other in the stacking direction.
In the stacking step, the reinforcing plates are stacked so that the reinforcing plate on the side closer to the plate-shaped member protrudes from the other reinforcing plates in the length direction of the plate-shaped member.
The claim is characterized in that, in the pressurizing step, pressurizing members are provided at the ends of the stacked reinforcing plates, and the pressurizing members pressurize each of the reinforcing plates toward the plate-shaped member. The method for repairing / reinforcing a structural material according to 4. In the pressurizing step, among the plurality of stacked reinforcing plates, the reinforcing plates are temporarily tightened by the pressurizing member in order from the reinforcing plate on the side closer to the plate-shaped member, and then from the plate-shaped member. The method for repairing / reinforcing a structural material according to claim 5, wherein the reinforcing plate is finally tightened by the pressure member in order from the reinforcing plate on the far side. The method for repairing / reinforcing a structural material according to any one of claims 1 to 6, wherein the pressure member is a vise or a bolt / nut. The method for repairing / reinforcing a structural material according to any one of claims 1 to 6, wherein a vise and bolts / nuts are used in combination as the pressurizing member. The method for repairing / reinforcing a structural material according to claim 7 or 8, wherein after using a vise as the pressure member, bolts and nuts are used instead of the vise. Any of claims 7 to 9, wherein when the pressure member is a vise, the stress generated in the vise is measured and the pressing force by the vise is adjusted according to the measured stress. The method for repairing / reinforcing a structural material according to item 1. The fiber-reinforced paste is a resin composition containing a room temperature curable thermosetting resin and a filler.
The resin composition contains both a fibrous filler and a non-spherical particle filler as the filler, has a viscosity of 5 to 2000 Pa · s at 25 ° C., and has a viscosity with respect to 100 parts by weight of a room temperature curable thermosetting resin. The fibrous filler and the non-spherical particle filler are prepared by the following formula (1).
Amount of non-spherical particle filler / Amount of fibrous filler = 1-10 ... (1)
Repair of the structural material according to any one of claims 1 to 10, wherein the total particle size is 20 to 150 parts by weight, and the average particle size of the non-spherical particle filler is 1 to 80 μm. Reinforcement method. It is a structural material repair / reinforcement structure for repairing or reinforcing the target part that requires repair or reinforcement of the structural material.
A fiber-reinforced paste applied to at least a part of the structural material including the target portion,
A reinforcing plate installed on the structural material so as to be layered on the fiber reinforced paste,
A pressurizing member that pressurizes the reinforcing plate toward the structural material is provided .
The fiber-reinforced paste is a structural material repair / reinforcement structure characterized by being a resin composition containing a room temperature curable thermosetting resin and a fibrous filler .

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