JP4044528B2 - Reinforcing equipment for concrete structures - Google Patents

Description

  The present invention relates to a reinforcing device that reinforces a concrete structure by preventing deformation due to expansion of the polygonal concrete structure.

  Concrete columns and beams such as reinforced concrete structures receive various forces from various directions. Therefore, there is a possibility that a part of the concrete column or beam is deformed due to expansion or the like and cracks are generated. When cracks or the like occur in this way and concrete columns and beams are damaged, there is a risk of collapse of the building. Therefore, conventionally, in order to prevent the concrete columns and beams from being damaged by the deformation, various reinforcing methods for preventing deformation such as expansion of the concrete columns and beams have been employed.

  As a method for reinforcing this concrete pillar, for example, steel plate winding reinforcement, carbon fiber winding reinforcement and the like are known. Steel plate winding reinforcement is a reinforcement method in which steel plates are welded along the peripheral surfaces of concrete columns and beams, and mortar or the like is injected and fixed between the concrete and the steel plates. In this reinforcement method, even if a concrete column or beam expands or cracks occur due to excessive force applied, this steel plate can suppress expansion and cracking and prevent destruction of the building. Can do.

  Carbon fiber winding reinforcement is a reinforcement method in which concrete columns and beams are surrounded by fiber reinforced resin such as carbon fibers. This reinforcing method is a method in which a reinforcing fiber sheet or the like is wrapped around a column, the impregnated resin is cured, and the column is wrapped in a cylindrical shape. This carbon fiber winding reinforcement can prevent the destruction of the building as well as the steel sheet winding reinforcement.

  However, with reinforcement methods such as steel plate winding reinforcement and carbon fiber winding reinforcement, when trying to reinforce existing concrete columns and beams, walls and floors are attached to the existing concrete columns and beams. Therefore, it is necessary to remove some of these walls and floors. After removing some of these floors and walls, it is necessary to reinforce the concrete columns and beams and restore the walls and floors again. Therefore, the construction period becomes long and the cost for the construction becomes high.

Therefore, reinforcing metal fittings are arranged at the corners of the outer peripheral surface of existing concrete columns and beams, and these reinforcing metal fittings are connected with a connecting tool such as a steel bar to deform the concrete columns and beams. There is a reinforcing method to prevent (for example, Patent Document 1). With this method of reinforcing a concrete column or beam, it is easy to attach a reinforcing bracket and the construction period can be shortened.
Japanese Patent Laid-Open No. 2000-120023 (FIG. 1)

  However, when the reinforcing metal fitting of the configuration of Patent Document 1 is provided, when the fatigue level of the coupler is accumulated and the strength is weakened, or when a large force is suddenly applied to the concrete column or beam due to an earthquake or the like In addition, there is a risk that this connector breaks due to the tensile force. When the connecting tool breaks, the connecting tool pops out in one direction due to the expansion force of the concrete columns and beams, so it is very dangerous if there are people or objects nearby. Therefore, it is necessary to take measures such as increasing the number of couplers that connect the engaging members or increasing the cross-sectional area of the coupler. However, when the number of connecting tools is increased, the number of parts is increased and the production cost is increased, and when the cross-sectional area of the connecting tool is increased, the reinforcing metal fitting itself is enlarged.

  An object of this invention is to provide the reinforcement tool of a safe concrete structure.

A concrete structure reinforcing instrument according to the present invention includes a plurality of engaging members respectively engaged with corners on the outer peripheral surface of a concrete structure having a substantially polygonal cross section, and provided on the outer periphery of the concrete structure. A reinforcing member for a concrete structure that includes a plurality of rod-like connecting members for connecting the joint members and prevents deformation due to expansion of the concrete structure, wherein the engaging member includes a pair of the connecting members together but are connected, at the intersection of the axis extended line of these coupling members, upon breaking the connecting member rests tensile force of the axial direction, the broken connecting member pops out on an extension of the axis A pin member for preventing this is provided.

Generally, the connecting member that connects the engaging members of the reinforcing instrument is formed of metal,
There is a possibility that the connecting member may be broken due to accumulation of fatigue or generation of excessive tensile force due to an earthquake. And when this connection member receives the force which is going to expand concrete, the connection member fractured | ruptured by this force will protrude in an axial direction. At this time, according to the present invention, when the plurality of connecting members that connect the plurality of engaging members are extended by applying an axial tensile force to the connecting member and breaking, A pin member is provided that prevents the shaft member from popping out from the extension of the shaft center. As a result, the pin member can prevent the connecting member from jumping out in the axial direction, so that no damage is caused to objects or people near the concrete structure. Therefore, by attaching this pin member , it is possible to reinforce the concrete by preventing deformation accompanying expansion of the concrete structure, and it is possible to ensure safety even when an excessive force such as an earthquake is applied.

In the present invention, as described above, the pin member is characterized and Turkey provided on the extension of the connecting member.

  In this invention, the pin member is provided on the extension of the connecting member. As a result, when the connecting member breaks due to a force due to an earthquake or the like and jumps out in the axial direction, the broken connecting member and the pin member come into contact with each other to prevent the connecting member from popping out. Further, since the pin member has a simple configuration that is simply provided on the extension of the connecting member, the production cost can be kept low.

  And it is preferable that the said pin member and the said engagement member are integrally formed by casting.

  According to this invention, the pin member and the engagement member are integrally formed in the casting. Thereby, since it is not necessary to separately provide a pin member on the engaging member, the work of attaching the pin member can be omitted, so that the work efficiency can be improved and the production cost can be reduced.

  Moreover, it is preferable that the said engaging member is formed in the cross-sectional substantially U shape provided with the main body which contact | abuts the said concrete structure, and the flange part formed in the both edge part of this main body.

  According to this invention, the engaging member is formed in a substantially U shape by the main body and the flange portion. Thereby, a space from the substantially U-shaped opening to the main body is formed in the engagement member, and the connecting member can be attached in this space. Therefore, the thick part of the engaging member does not get in the way and can be easily attached to the connecting member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 5 are views showing a concrete structure and a reinforcing device thereof according to this embodiment. FIG. 1 is an overall front view of a column to which a reinforcing device according to the present embodiment is attached. FIG. 2 is a perspective view showing a reinforcing instrument and a part of a column to which the reinforcing instrument is attached. FIG. 3 is a front view showing a reinforcing instrument and a part of a column to which the reinforcing instrument is attached. 4 is a cross-sectional view of the column of FIG. 3 taken along the line IV-IV. FIG. 5 is an enlarged view of the engaging member of the reinforcing instrument in FIG. 4.

  In FIG. 1, reference numeral 10 denotes a reinforced concrete building. A column 20 as a concrete structure is formed on a part of the reinforced concrete building 10, and a reinforcing device 30 is attached to the column 20.

  The column 20 is a concrete prismatic body formed on the floor 11 and supporting the upper floor 12. The bar 20 is provided with a reinforcing material (not shown). The reinforcing material is arranged in the upper and lower floor portions 11 and 12, and the lower foundation 13 and the upper beam 14. And connected to each other. In the present embodiment, the pillar 20 is provided on the first floor portion as the foundation 13 is illustrated. However, the present invention is not limited to this, and the pillar 20 is provided on the second floor or higher or in the underground level. May be applied. In addition, although the example which uses a reinforcement tool for the pillar 20 here is shown, you may apply not only to a pillar but to the beam etc. which are formed with concrete.

  As shown in FIG. 2, a wall 21 is formed at the approximate center of the column 20. An insertion hole 22 is formed in the wall 21, and a connecting member 32 of a reinforcing instrument 30 described later is inserted into the insertion hole 22. In addition, in this Embodiment, the wall 21 is formed in the approximate center of the pillar 20, and the structure which continues the pillar 20 and the wall 21 is shown, However, It is not limited to this. For example, the wall 20 may not be formed on the pillar 20.

  The column 20 is provided with a plurality of reinforcing instruments 30 surrounding the four circumferences at predetermined intervals. The interval between the reinforcing devices 30 is not particularly limited, and may be determined as appropriate upon implementation.

  3 to 5, the reinforcing device 30 includes a total of four corner pieces 31 as engaging members disposed at each corner of the column 20, and these corner pieces 31 are arranged along the four-round surface of the column 20. A total of four connecting members 32 that are connected horizontally are provided.

  The corner piece 31 is made of a metal material such as steel, and is formed into a substantially L shape by casting as shown in FIG. The corner piece 31 includes a main body 310 having two abutting surfaces 311 that abut on the pillar 20 and two flange portions 314 formed at upper and lower edge portions of the main body 310. The two contact surfaces 311 of the main body 310 are in contact with two surfaces intersecting each other at the corners of the column 20, and the flange portion 314 is formed so as to be substantially perpendicular to these contact surfaces 311 and to be horizontal. The main body 310 and the flange portion 314 are formed to have a substantially U-shaped cross section.

  In the main body 310, a connection portion 312 that is substantially orthogonal to the contact surface 311 and the flange portion 314 is formed at a position away from the position where the two contact surfaces 311 intersect. A connection hole 313 is formed in the connection portion 312. In addition, side flange portions 315 that connect the connection portion 312 and the end portion of the contact surface 311 of the main body 310 are formed on the left and right ends of the main body 310. The side flange portion 315 reinforces the connecting portion 312 from the end direction, and prevents the connecting portion 312 from being deformed or damaged by being pulled by the connecting member 32.

  A stopper pin 33 is formed on the flange portion 314 so as to be orthogonal to the upper and lower flange portions 314. At this time, the stopper pin 33 is parallel to the contact surface 311 substantially perpendicular to the connection portion 312 where the connection hole portion 313 is formed from the connection hole portion 313 of the two connection portions 312. (Indicated by a two-dot chain line in FIG. 4) is extended and formed at a position where these horizontal lines intersect. The stopper pin 33 is integrally formed with the corner piece 31 by casting.

  The connecting member 32 is a substantially linear member formed of a steel rod such as a PC steel rod. A male screw portion 321 is formed at the distal end portion of the connecting member 32. The connecting member 32 has a tip inserted through the connection hole 313 of the corner piece 31, and is passed through a washer 324 from a substantially U-shaped space A side surrounded by the main body 310 and the flange 314, and the first nut 322 is inserted. And the 2nd nut 323 is screwed together and fixed to the external thread part 321.

  For connecting the corner pieces 31 by the connecting members 32, first, the connecting members 32 are inserted through the connection holes 313 of all the corner pieces. And in each corner piece 31, the washer 324 and the 1st nut 322 are temporarily fixed to the external thread part 321 of the connection member 32. FIG. At this time, the space A formed by the body 310 and the flange portion 314 of the corner piece 31 can be used for temporary fixing. Then, the first nut 322 is evenly tightened in the four corner pieces 31 and the corner pieces 31 are connected by the connecting members 32. Thereafter, the second nut 323 is screwed onto the first nut 322. The second nut 323 functions as a loosening prevention for the first nut 322 by tightening the first nut 322.

  The reinforcing device 30 fixed to the column 20 prevents deformation accompanying expansion of the column 20 or the like. Therefore, the reinforcing device 30 always receives pressure due to expansion of the column 20 or the like. In such a reinforcing device 30, metal fatigue tends to accumulate particularly in the connecting member 32, and the connecting member 32 may break due to such metal fatigue. In addition, when an excessive force is applied to the connecting member 32 such as an earthquake, the connecting member 32 may be similarly broken.

  When the connecting member 32 is broken in this manner, the connecting member 32 is vigorously ejected in the axial direction due to the pressure applied to the reinforcing device 30 by the concrete of the pillar 20. At this time, in the reinforcing instrument 30 of the present embodiment, since the stopper pin 33 is provided, the connecting member 32 that is about to break and jump out comes into contact with the stopper pin 33. The connecting member 32 that has come into contact with the stopper pin 33 either comes into full contact with the stopper pin 33 and stops, or rebounds at the moment of contact with the stopper pin 33 and stops between the stopper pin 33 and the connection hole 313. .

In the reinforcing device 30 of the present embodiment as described above, the following effects are obtained.
The reinforcing device 30 according to the present embodiment includes four corner pieces 31 arranged at each corner of the column 20 and four connecting members 32 that connect these corner pieces 31. A stopper pin 33 is provided to prevent the broken connecting member 32 from jumping out on the extension of the shaft center when the connecting member 32 is broken due to a tensile force in the axial direction. Accordingly, even when the connecting member 32 is broken due to accumulation of metal fatigue of the connecting member 32 or generation of excessive tensile force due to an earthquake, the stopper pin 33 prevents the connecting member 32 from protruding in the axial direction. can do. Therefore, the stopper pin 33 can prevent the connecting member 32 from popping out, so that safety can be ensured without damaging objects or people near the concrete structure.

  In addition, horizontal lines are extended from the connection hole portions 313 of the two connection portions 312 of the main body 310 so as to be parallel to the contact surface 311 substantially perpendicular to the connection portion 312 where the connection hole portions 313 are formed. The stopper pin 33 is formed so as to be orthogonal to the upper and lower flange portions 314 on the position where the horizontal lines intersect, that is, on the intersection position of the extension lines of the two connecting members 32 connected to the connection portion 312. Thereby, when the connecting member 32 breaks and tries to jump out in the axial direction, the broken connecting member 32 and the stopper pin 33 come into contact with each other, and the jumping out of the connecting member 32 can be prevented. Further, since the stopper pin 33 has a simple configuration only provided on the extension of the connecting member 32, the corner piece can be easily manufactured.

  The stopper pin 33 and the corner piece 31 are integrally formed by casting. Thereby, the operation | work which installs the stopper pin 33 in the corner piece 31 is unnecessary, and the installation operation | work of the stopper pin 33 can be abbreviate | omitted, For this reason, the improvement of work efficiency can be aimed at.

  Further, conventionally, the corner piece is formed by forging, but is formed by casting as in the present embodiment. Thereby, the weight is lighter than that formed by forging, and the material cost can be reduced, so that the production cost can be reduced. In addition, the corner piece 31 formed by casting can reduce the thickness dimension compared to the corner piece formed by conventional forging, and can form the small corner piece 31 compared to the corner piece formed by forging. It can also be used in narrow spaces.

  The corner piece 31 is formed in a substantially U shape by a main body 310 that abuts on a corner portion of the column 20 and a flange portion 314 formed by bending the upper and lower ends of the main body 310. As a result, a space A surrounded by the main body 310 and the flange portion 314 is formed in the corner piece 31, and the attachment work of the connecting member 32 can be performed in the space A. Therefore, the connecting member 32 can be easily attached to the corner piece 31, and the construction period of the reinforcement work can be shortened.

  Moreover, the corner piece 31 of this Embodiment installs the four corner pieces 31 in each corner | angular part of the outer peripheral surface of the pillar 20, and connects the corner pieces 31 with the four connection members 32 along the surface of the pillar 20. is doing. Thereby, even when it is desired to reinforce the existing pillar 20, the reinforcement work 30 can be easily performed by attaching the reinforcing device 30 on the surface of the pillar 20. Accordingly, there is no need to drill a part of the wall or floor as in the conventional steel plate winding reinforcement, and the reinforcing device 30 can be easily attached, and the workability of the reinforcing work can be improved.

  Furthermore, since the reinforcing instrument 30 is attached to the surface of the column 20, it is possible to easily perform periodic replacement of the connecting member 32 and maintenance of the column 20 and the beam. Therefore, it is possible to perform construction while occupying only the construction area without moving by the building user, so that the cost for repairing and re-reinforcing work can be reduced, and the construction period of the reinforcing work can be shortened.

  It should be noted that the present invention is not limited to the above-described embodiment, but includes modifications and improvements as long as the object of the present invention can be achieved.

  For example, in the above-described embodiment, the corner piece 31 and the stopper pin 33 are integrally formed by casting. However, the present invention is not limited to this. For example, a configuration as shown in FIG. In FIG. 6, a pin insertion hole 316 is formed in a flange portion 314 that is an extension of the connecting member 32, and a separately prepared stopper pin 331 is inserted into the pin insertion hole 316. When using such a reinforcing instrument, first, the corner pieces 31 are arranged at the respective corners of the pillars 20, and these corner pieces 31 are respectively connected by the connecting members 32. Thereafter, the stopper pin 33 is inserted into the pin insertion hole 316. At this time, the stopper pin 33 is fixed to the pin insertion hole 316 by press-fitting or welding. With such a configuration, since the stopper pin 331 can be installed after the connection of the connecting member 32, when the corner piece 31 is connected by the connecting member 32, the space between the main body 310 of the corner piece 31 and the flange portion 314. A can be further widened, and the connecting work of the connecting member 32 can be performed more easily.

  Moreover, in the said embodiment, from the connection hole part 313 of the two connection parts 312 of the main body 310 of the corner piece 31, it is parallel to the contact surface 311 substantially orthogonal to the connection part 312 in which this connection hole part 313 is formed. The horizontal line is extended so that the stopper pin 33 is formed so as to be orthogonal to the upper and lower flange portions 314 at the intersection of these horizontal lines, that is, at the intersection of the extended lines of the two connecting members 32. Not limited to. For example, one stopper pin 33 may be formed on each end extension of one connecting member 32. Further, the stopper is not limited to the stopper pin 33, and for example, a plate-like stopper may be provided at the corner of the corner piece that is an extension of the connecting member 32. As described above, when the stopper is disposed on the extension of the connecting member 32 and the connecting member 32 is broken, if the stopper is in contact with the broken connecting member 32 and prevents popping out, the shape, material, number, etc. Is not questioned.

  In addition to the above, as shown in FIG. 7, the stopper may have a configuration in which a stopper piece 332 is provided at a position on the opposite side across the side flange portion 315 of the connection portion 312. The stopper piece 332 is made of a steel member, for example, and is formed in a substantially rectangular parallelepiped shape. As shown in FIG. 8, the stopper piece 332 includes a column facing surface 333 disposed on the column 20 side, and a connection portion facing surface 334 that intersects the column facing surface 333 substantially orthogonally and contacts the connecting portion 312. And a connecting member insertion surface 335 serving as a side surface opposite to the connection portion facing surface 334. An installation groove 336 having a substantially U-shaped cross section is formed in the column facing surface 333 so as to penetrate from the connection portion facing surface 334 to the connecting member insertion surface 335. The installation groove 336 is formed with a female screw portion 337 that meshes with the male screw portion 321 of the connecting member 32. When such a stopper piece 332 is used, when the connecting member 32 breaks and tries to jump out in the axial direction, the connecting portion 32 is opposed to the connecting portion of the stopper piece 332 engaged with the male screw portion 321 and the female screw portion 337. The surface 334 abuts on the connection portion 312, and the connecting member 32 can be prevented from popping out. Further, the stopper piece 332 can be easily attached. Furthermore, since it attaches to the position of the side flange part 315, the space A between the main body 310 and the flange part 314 becomes wide, and the workability | operativity of the attachment operation | work of the connection member 32 can be improved.

  In addition, the stopper piece 332 is costly and troublesome for forming the stopper piece 332. On the other hand, as shown in FIG. 9, an E ring 338 may be attached instead of the stopper piece 332. The E-ring 338 is attached by engaging the protruding piece 338 </ b> A with the groove portion 325 formed in the male screw portion 321 of the connecting member 32. The diameter of the E-ring 338 is set larger than the diameter of the connection hole 313, and the E-ring 338 is formed so as not to pass through the connection hole 313. With such a configuration, even if the connecting member 32 breaks and tries to jump out in the axial direction, the E-ring 338 and the connecting portion come into contact with each other, so that the connecting member 32 can be prevented from popping out. Furthermore, the E-ring 338 is less expensive than the stopper piece 332 and can be easily mounted.

  In addition, although the E ring 338 showed the example attached to the groove part 325 formed in the surrounding surface of the connection member 32, even if the projection piece 338A of the E ring 338 was directly engaged with the external thread part 321 of the connection member 32, it is. Good. In this case, since it is not necessary to process the connecting member 32, it is possible to further reduce production time and cost.

  Furthermore, as shown in FIG. 10, the connecting member 32 has a stopper insertion hole 326 formed in the radial direction of the connecting member 32 on the side flange portion 315 side from the connection portion 312, and a stopper is provided in the insertion hole. The pin 331A may be inserted. The stopper pin 331A has a length larger than the diameter of the connection hole 313. For example, retaining balls 331B are attached to both ends of the stopper pin 331A. The retaining ball 331B is provided so as to be able to protrude and retract in the radial direction of the stopper pin 331A, and is biased in the radial direction from the central axis. For this reason, when the stopper pin 331A is inserted into the stopper insertion hole 326, the retaining ball 331B is sunk in the direction of the central axis, and protrudes again when the retaining ball 331B passes through the stopper insertion hole 326. Even when such a stopper pin 331A is used, the stopper pin 331A abuts against the connecting portion 312 when the broken connecting member 32 is about to jump out of the extension, and the connecting member 32 can be prevented from popping out. Although the stopper pin 331A provided with the retaining ball 331B is shown here, the stopper ball 331B is not provided, and the stopper pin 331A is fixed to the stopper insertion hole 326 by press-fitting, welding, adhesion, or the like. It is good.

  Moreover, in the said embodiment, although the corner piece 31 was shape | molded by casting, it is not limited to this. For example, the corner piece 31 may be formed by forging. In this case, the strength and durability of the corner piece 31 can be enhanced, and the corner piece 31 is not easily damaged.

  Furthermore, in the said embodiment, although the corner piece 31 was provided with the flange part 314 formed in the edge part of the main body 310 and the main body 310, it is not limited to this. For example, the flange portion 314 may not be formed. In this case, for example, as shown in FIG. 11, stopper pieces 339 that are substantially parallel to the two connection portions 312 are provided at the corner portions of the main body 310 corresponding to the corner vertices of the pillars 20 to prevent the coupling member 32 from popping out. It is good also as a structure which provides a stopper in the side flange part 315 side of the connection member 32 as mentioned above. In such a case, when the connecting member 32 is connected to the corner piece 31, the work space is further widened, so that workability is further improved.

In addition, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described with particular reference to certain specific embodiments, but without departing from the spirit and scope of the invention, Various modifications can be made by those skilled in the art in terms of material, quantity, and other detailed configurations.
Therefore, the description limiting the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such restrictions is included in this invention.

  The present invention can be used for reinforcing columns and beams of reinforced concrete buildings.

It is the whole pillar front view to which the reinforcing instrument of this Embodiment was attached. It is a perspective view which shows a part of pillar which the reinforcing instrument and the reinforcing instrument were attached. It is a front view which shows a part of pillar to which the reinforcing instrument and the reinforcing instrument are attached. It is sectional drawing when the pillar of FIG. 3 is cut by the IV-IV line. It is an enlarged view of the engaging member of a reinforcement instrument. It is a longitudinal cross-sectional view of the engaging member which shows the modification of this Embodiment. It is a cross-sectional view of the engaging member showing another modification of the present embodiment. It is a perspective view of the stopper in FIG. It is a perspective view which shows the connection member and stopper of another modification of this Embodiment. It is a cross-sectional view which shows the modification of another stopper of this Embodiment. It is a longitudinal cross-sectional view of the engaging member which shows another modification of this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 ... Column as concrete structure 30 ... Reinforcing device 31 ... Corner piece as engaging member 310 ... Main body 314 ... Flange part 32 ... Connecting member 33,331,331A ... Stopper pin as stopper 332 ... Stopper piece as stopper 338 ... E-ring as a stopper 339 ... Stopper piece as a stopper

Claims (3)

A plurality of engagement members respectively engaged with corners of the outer peripheral surface of the concrete structure having a substantially polygonal cross section, and a plurality of rod-like connections provided on the outer periphery of the concrete structure to connect the engagement members to each other A reinforcing member for a concrete structure that prevents deformation accompanying expansion of the concrete structure,
A pair of the connecting members are connected to the engaging member, and when the connecting member is broken due to the axial force applied to the connecting member at the intersection of the axial extension lines of the connecting members, A reinforcing member for a concrete structure, wherein a pin member is provided to prevent the broken connecting member from jumping out on an extension of the shaft center. The reinforcing device for a concrete structure according to claim 1,
The said pin member and the said engagement member are integrally formed by casting. The reinforcement tool of the concrete structure characterized by the above-mentioned. In the reinforcing device for a concrete structure according to claim 1 or 2,
The engaging member is formed in a substantially U-shaped cross section including a main body that comes into contact with the concrete structure and flange portions formed at both edges of the main body. Reinforcement equipment.

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