JP4279846B2 - Reinforcement structure of wooden frame building - Google Patents

Description

  The present invention is intended to improve the seismic resistance of a wooden framed building, and is a vertical plane (including beams, girders, and foundations) including a pair of left and right columns and a transverse member (including beams, girders, and foundations) orthogonal to the columns. The present invention relates to a reinforcing structure of a wooden framed building that is a target of reinforcement on a surface equivalent to a wall made of columns and horizontal members.

  2. Description of the Related Art Conventionally, in a wooden framed building, a technique for reinforcing a vertical construction surface by columns, beams, and a foundation with a brace and a technique using a structural plywood are known.

The reinforcement method using the brace is to connect the upper and lower ends of the brace with columns and beams, and the corners of the column and foundation at an angle, and fasten the joint with hardware. It will be a scale (diagonal length of a square frame), and the end part needs to be cut obliquely according to the joint surfaces of the column and beam.
In particular, reinforcement of an existing wooden framed building has been a difficult construction technique that requires on-site alignment processing for each brace due to the construction error.

In addition, the reinforcing method using structural plywood is to attach plywood having shear rigidity between columns, but it is necessary to stop the four outer sides of the plywood with a large number of nails, which is troublesome in construction. there were.
In addition, it is necessary to attach the plywood to the front surface of the pillar. Therefore, when the wall on the indoor side is reinforced by this method, the part corresponding to the thickness of the plywood protrudes to the indoor side only in the reinforced wall part (partial Jump out).

  Furthermore, in addition to the above-mentioned problems, in order to attach the reinforcing plywood to the part above the ceiling board or the part below the floor board, it is necessary to partially cut or repair these materials, from the beam to the foundation The entire plywood reinforcement as a wall increases the construction cost.

As a means for solving the above problem, there is known a reinforcing structure provided with a horizontal beam connected by a stopper between a pair of columns and a reinforcing plate attached to an opening formed by the pair of columns and the horizontal beam (patent) Reference 1).
The cross rail and the stopper provided in this reinforcing structure support the reinforcing plate, and do not receive the reaction force or bending moment of the column.

Furthermore, a reinforcement structure in which a viscoelastic damper having a viscoelastic deformation characteristic is attached to a corner portion of a shaft assembly orthogonal to the construction surface is known as a reinforcement structure of a frame assembly (see Patent Document 2).
This reinforcement structure is intended to absorb and control the vibration deformation of the shaft due to the earthquake with the viscoelastic body energy of the viscoelastic damper, and is essentially the reinforcement hardware of the present invention that makes the earthquake resistant by absorbing the plastic deformation energy. Is different.
JP 2005-226450 A JP 2000-160683 A

In addition, as a method of increasing the shear strength of framed buildings that have been known since ancient times, in horizontal construction, the corners between orthogonal foundations and horizontal members, called fire-fired, are diagonally fastened. Then, there is a method of reinforcing the rectangular frame.
Similarly, in a vertical construction surface, there is a known method of reinforcing a column and a beam gate-shaped set by fastening an orthogonal column called a cane and a corner of a horizontal member obliquely.
However, in order to form triangles at the corners of the shaft group, the target shaft group members must be directly coupled (generally coupled with tenons), and the energy absorption function due to the plastic deformation of the diagonal material is completely The structure is not considered, and is essentially different from the configuration proposed in the present invention.

  The present invention has been made to solve the above-described problems. In particular, the earthquake resistance of a wooden framed building including an existing building can be improved extremely easily and can be constructed at a low cost. The purpose is to.

  In other words, the present invention is intended to reinforce the vertical construction surface of a wooden building, and a pair of left and right columns, which are constituent members of the vertical construction surface, are joined by horizontal rails having reinforcement hardware at both ends, The entire vertical construction surface can be formed into multi-layered ramen to improve and improve the seismic strength with high performance. It is an object of the present invention to provide a reinforcing structure for a wooden framed building that can be easily inserted into and attached to.

In order to solve the above problems, the reinforcing structure of a wooden building of the present invention (Claim 1) is:
Reinforcement structure for vertical construction with a pair of left and right columns of a wooden frame building and horizontal members (including beams, girders and foundations) orthogonal to the columns,
A horizontal rail passed between the pair of pillars, and reinforcing hardware attached to both ends of the horizontal rail,
The reinforcement hardware includes a vertical surface (a surface on the column side of a right-angle surface formed by an extension line of the column and the horizontal beam) and a horizontal surface (the column and the horizontal beam). A vertical mounting piece and a horizontal mounting piece that are attached to a horizontal rail side surface among right-angled surfaces formed by the extension line, and an oblique piece that is passed between the vertical mounting piece and the horizontal mounting piece. Formed,
The oblique piece is formed in a buckled reinforcing structure having a concavo-convex shape or a rib or a flange,
The vertical mounting piece is attached to the vertical surface through at least two mounting holes arranged in the vertical direction of the column,
The lateral mounting piece is attached to the lateral surface through at least two mounting holes disposed in the axial direction of the horizontal rail,
In addition, the horizontal rail is formed to be shorter than the dimension between the columns, and a gap is formed between both end surfaces of the horizontal rail and the columns.
In the present invention, that the oblique piece has a concave-convex shape or a rib or a flange means a L-shaped cross section, a T-shaped cross section, an I-shaped cross section, or the like.

Moreover, the reinforcing structure of the wooden building of the present invention (Claim 2) is:
The reinforcing structure according to claim 1, wherein the horizontal rail is a wooden horizontal rail having a square cross section.

Moreover, the reinforcing structure of the wooden building of the present invention (Claim 3) is:
The reinforcing structure according to claim 1, wherein the horizontal rail is a metal horizontal rail having a square cross section or a substantially U-shaped cross section.

Moreover, the reinforcing structure of the wooden building of the present invention (Claim 4) is:
The reinforcing structure according to claim 3, wherein at least one of the reinforcing hardwares attached to both ends of the metal horizontal rail is attached to the metal horizontal rail so as to be movable in the axial direction .

Moreover, the reinforcing structure of the wooden building of the present invention (Claim 5) is:
4. The reinforcing structure according to claim 3, wherein the metal crosspiece is formed to be adjustable in length by an outer side crosspiece and an inner side crosspiece fitted in the outer side crosspiece so as to be slidable in the axial direction . The configuration.

Moreover, the reinforcing structure of the wooden building of the present invention (Claim 6) is:
6. The reinforcing structure according to claim 3, 4 or 5, wherein a wooden core material is fitted into the inside of the metal cross rail.

Moreover, the reinforcing structure of the wooden building of the present invention (Claim 7) is:
The reinforcing structure according to claim 2, wherein a metal reinforcing material having a square cross section or a substantially U cross section is attached to at least a range of the wooden horizontal rail to which the reinforcing hardware is attached.

The reinforcing hardware used in the present invention includes a vertical mounting piece that is attached to a vertical surface that forms a right-angle plane between a column and a horizontal rail, a horizontal mounting piece that is attached to a horizontal surface, and the vertical mounting piece and the horizontal mounting. It is formed with a slanting piece passed between the pieces.
And the oblique piece is formed in the buckling reinforcement structure which has an uneven | corrugated shape of a cross section, or a rib and a flange.
Further, the vertical mounting piece is attached to the vertical surface through at least two mounting holes arranged in the vertical direction of the column,
The horizontal mounting piece is mounted on the horizontal surface through at least two mounting holes arranged in the axial direction of the horizontal rail.

  As described above, it is possible to attach the horizontal beam and reinforcement hardware in the vertical construction plane (in the wall gap), so it is easy to install multiple horizontal beams and reinforcement hardware. Because it fits within the thickness, it is easy to repair the interior wall (decoration wall) after construction, and it is also easy to avoid interference with equipment such as outlets laid on the wall and heat insulating material in the wall. Never give.

Further, the horizontal beam and the reinforcing hardware attached as described above have high shear strength against the shear deformation of the attached vertical structural surface, and function as a shear deformation suppressing member to reinforce the vertical structural surface. Seismic strength can be improved.
In particular, even when an existing wooden frame building is seismically reinforced, it can be reinforced only by removing the interior walls, rainy work is possible, and it is extremely simple and low in both existing and new construction. High-strength seismic reinforcement at low cost.

FIG. 1 is a front view showing a first embodiment of a reinforcing structure for a wooden building of the present invention.
This reinforcement structure is a reinforcement structure intended for a vertical construction surface including a pair of left and right columns 1 and 1 and a beam 20 orthogonal to the columns 1 and 1, and is passed between the pair of columns 1 and 1. The horizontal rail 3 and reinforcing hardwares 4 and 4 attached to both ends of the horizontal rail 3 are provided.

The horizontal rail 3 is formed in a wooden horizontal rail 3a having a square cross section.
As described above, when the wooden crosspiece 3a is formed to be shorter than the inter-column dimension, even if the dimensions between the columns 1 and 1 are varied, the wooden horizontal cross-piece 3a is set to an appropriate length shorter than the inter-column dimension at the construction site. It is easy to cope with the dimensional difference between the pillars in each building and each place, and it is not necessary to have a horizontal beam with various dimensions.

As shown in the front view of FIG. 2 (a), the reinforcing metal piece 4 includes a vertical mounting piece 40 and a horizontal mounting that are mounted on the vertical surface 10 and the horizontal surface 30 that form a right angle surface between the pillar 1 and the horizontal rail 3. The mounting piece 41 is formed of a slanting piece 42 passed between the vertical mounting piece 40 and the horizontal mounting piece 41.
The slanting piece 42 is passed between the vertical mounting piece 40 and the horizontal mounting piece 41, as shown in FIG. The buckling reinforcement structure is formed by forming the upper portion 42a and forming a concavo-convex shape in which the upright portion 42b is formed at the periphery of the space 43a formed inside.

Two mounting holes 44, 44 arranged in the vertical direction of the pillar 1 are formed in the vertical mounting piece 40, and two mounting holes 44 arranged in the axial direction of the horizontal rail 3 are formed in the horizontal mounting piece 41. Mounting holes 45, 45 are formed, and the vertical mounting piece 40 is mounted to the vertical surface 10 of the pillar 1 with a screw 50 or the like through these mounting holes 44, 45, and the horizontal mounting piece 41 is connected to the horizontal rail 3. It is attached to the lateral surface 30 with a screw 51 or the like.

Next, the construction procedure will be described.
First, the horizontal rail 3 is temporarily fixed between a pair of columns 1 and 1 at a predetermined height.
Next, with the horizontal mounting piece 41 of the reinforcing metal piece 4 applied to the horizontal surface 30 of the horizontal rail 3 at one end portion (for example, the left end portion) of the horizontal rail 3, the vertical mounting piece 40 of the reinforcing hardware 4 is It is fastened and fixed to the vertical surface 10 with screws 50 and 50 through two mounting holes 44 and 44.
Next, the vertical mounting piece 40 of the reinforcing metal piece 4 is attached to the column 1 in a state where the horizontal mounting piece 41 of the reinforcing metal piece 4 is applied to the horizontal surface 30 of the horizontal rail 3 at the other end portion (for example, the right end portion) of the horizontal rail 3. Are fastened and fixed by screws 50 and 50 through two mounting holes 44 and 44 to the vertical surface 10.

Next, the lateral mounting pieces 41, 41 of the reinforcing metal piece 4 are attached to the lateral surfaces 30, 30 of the horizontal rail 3 with the screws 51, 51 or the like through the mounting holes 45, 45.
And in the case of the above installation construction, the clearance S, S is formed between the both end surfaces of the crosspiece 3 and the pillars 1 and 1.

In the present embodiment, the reinforcement hardware 90 and 91 is also attached to the right-angled corner surfaces of the pillar 1 and the base 21 and the right-angled corner surfaces of the pillar 1 and the beam 20 which are the original axes of the building.
This is intended to achieve the effect of improving the shear strength using all the materials of the shaft assembly, and is preferably used in combination with the reinforcing structure constituted by the cross rail 3 and the reinforcing hardware 4 of the present invention.
In addition, there is a case where the reinforcing hardware is not attached to the right-angled corner surfaces of the pillar 1 and the base 21 because the priority is given to attaching hardware (generally referred to as hole-down hardware) that stops the lifting of the pillar 1. This is to prevent interference in terms of space.

6 and 7 are schematic structural views of a reinforcing structure using the reinforcing link 49 and the cross rail 3. FIG.
The reinforcing structure of FIG. 6 is one in which one reinforcing link 49 is attached between a vertical surface (column 1) and a horizontal surface (horizontal rail 3) .
As shown in FIG. 6 (a), when the reinforcing link 49 is connected to the horizontal beam and the column at one place, when an external force F acts on this, as shown in FIG. 6 (b), A tensile force acts on one reinforcing link 49 (the left reinforcing link 49 in the figure), a compressive force acts on the horizontal beam end portion 3d (the horizontal beam left end portion 3d in the drawing), and the other reinforcing link 49 ( A compressive force is applied to the reinforcing link 49 on the right side in the drawing, and a tensile force is applied to the horizontal beam end portion 3d (the horizontal beam right end portion 3d in the drawing).
As a result, a bending moment acts on the column and the crosspiece in a direction opposite to the external force F, and vertical composition deformation can be suppressed.

On the other hand, the reinforcing structure of FIG. 7 is a schematic structural view showing the reinforcing structure of the present invention, in which two reinforcing links 49a and 49b are attached between the vertical surface and the horizontal surface.
As shown in FIG. 7 (a), when the reinforcing links 49a and 49b are connected to the cross rail and the column by two each, when an external force F acts on this due to an earthquake or the like, Thus, a tensile force acts on one reinforcing link 49a at one end (the left end in the figure), a compressive force acts on the other reinforcing link 49b, and one of the other links (the right end in the figure) A compressive force acts on the reinforcing link 49a, and a tensile force acts on the other reinforcing link 49b.
As a result, a bending moment acts on the column and the crosspiece in a direction opposite to the external force F, and vertical composition deformation can be suppressed.

Since it is set as the above structure, the crosspiece 3 can fully exhibit a function, without making the end surface contact the pillar 1 (a horizontal force is supported by a pillar).
In other words, the cross rail 3 only needs to be connected to the column 1 via the reinforcement hardware 4, and the gaps S and S of the end surfaces can be freely selected. Therefore, the gaps S and S are absorbed by the difference in dimensions between the columns 1 and 1. It can be used as an alternative, and it is not necessary to have cross beams of various dimensions, and it is very easy to construct an existing building where dimensions are likely to be distorted, and its applicability is greatly improved.
It should be noted that the gaps S between the end face of the cross rail 3 and the column 1 do not have to be the same at the left and right ends. In other words, the gap between the end face of the horizontal beam 3 and the column 1 is provided to absorb the dimensional difference between the columns 1 and 1 as described above, so that the left and right identity is not necessarily required, and the situation at the site The right and left gap distribution can be set in accordance with.

3 to 5 show other examples of the reinforcing hardware.
The reinforcing hardware 4 shown in FIG. 3 is obliquely passed between the vertical mounting piece 40 and the horizontal mounting piece 41 as shown in FIG. A raised portion 42 a is formed on the outer edge of the piece 42, and a concavo-convex shape is formed in which a raised portion 42 c is formed on the edge of the chamfered portion formed at the corner.

  The reinforcing metal piece 4 shown in FIG. 4 is obliquely passed between the vertical mounting piece 40 and the horizontal mounting piece 41 as shown in FIG. A space 43 b is formed at the corner of the piece 42, an upright portion 42 d is formed at the edge of the space 43 b, and an upright portion 42 a is formed at the outer edge of the oblique piece 42.

  The reinforcing hardware shown in FIG. 5 is an oblique piece passed between the vertical mounting piece 40 and the horizontal mounting piece 41 as shown in FIG. 5 (b), which is a DD cross-sectional view of FIG. 5 (a). A substantially U-shaped portion 42 e is formed on 42.

Next, FIGS. 8 to 14 show other examples of the horizontal rail.
The horizontal beam 3 shown in FIG. 8 is a metal horizontal beam 3b, which uses a channel shape with a lip having a substantially U-shaped cross section and is cut into a length slightly shorter than the inter-column dimension. Circular through-holes 31, 31 that coincide with the lateral mounting piece 41 are formed at two positions at both ends.
In order to attach the reinforcing metal piece 4 to the metal crosspiece 3b, the mounting holes 45, 45 of the reinforcing metal piece 4 are aligned with the through holes 31, 31 and fastened with bolts or the like.

  As the horizontal metal rail 3b, as shown in FIG. 9, a non-lip channel shape having a substantially U-shaped cross section, a square pipe material having a square cross section as shown in FIG.

Unlike the wooden crosspiece 3a, the metal crosspiece 3b is difficult to cut to an appropriate length at the construction site, so at least one of the reinforcement hardware 4 attached to both ends of the metal crosspiece 3b. It is preferable to attach the reinforcing metal piece 4 to the metal crosspiece 3b so as to be movable in the axial direction .

As a structure for this purpose, as shown in FIG. 11, a through hole 31a formed at one end of the metal cross rail 3b is formed as a long hole in the axial direction of the metal cross rail 3b. In addition, you may form the through-hole 31a by a long hole in the both ends of the metal crosspiece 3b.
Accordingly, the reinforcing metal piece 4 can be attached to the metal crosspiece 3b so as to be movable in the axial direction by the amount that the through hole 31a is formed as a long hole, and the metal crosspiece 3b can be attached to the various inter-column dimensions. The reinforcing metal piece 4 can be attached between the columns 1 and 1.

When the through hole 31 is formed in a circular shape as in the metal crosspiece 3b shown in FIG. 8, the mounting holes 45, 45 formed in the lateral mounting piece 41 of the reinforcing hardware 4 are oblong holes (not shown). ), The reinforcement hardware 4 can be attached to the metal crosspiece 3b so as to be movable in the axial direction .

Next, the metal crosspiece 3b shown in FIG. 12 is formed to be adjustable in length by an outer side crosspiece 35a and an inner side crosspiece 35b fitted inside the outer side crosspiece 35a so as to be slidable in the axial direction. This is also a structure for corresponding to various dimensions between the pillars 1 and 1.
In this case, the long hole 36a formed in the outer side crosspiece 35a (or the inner side crosspiece 35b) and the round hole 36b formed in the inner side crosspiece 35b (or the outer side crosspiece 35a) may be matched and fastened by the bolt 36c. Thus, the entire length of the metal crosspiece 3b can be expanded and contracted by the length of the elongated hole 36a. The bolts 36c and 36c may be through bolts.

Next, FIG. 13 shows another example of the length adjustment of the metal cross rail 3b.
The horizontal rail 3 shown in FIG. 13 has metal outer members 37, 37 attached to both ends of the metal horizontal rail 3b.
In this case, the left and right metal outer members 37 can be slid in the axial direction with respect to the metal crosspiece 3b.
That is, the distance between the metal outer members 37 and 37 can be changed in accordance with the adjustment of the mounting position of the reinforcing hardware 4.

The horizontal beam shown in FIG. 14 is a composite horizontal beam in which a wooden core material 3c is fitted inside a metal horizontal beam 3b, and the cross section is reduced while maintaining strength and rigidity by the metal horizontal beam 3b and the wooden core material 3c. Can do.
Such a composite cross rail can also be applied to the metal cross rail 3b shown in FIGS.

  If the crosspiece 3 is satisfactory in strength and rigidity, the thinner it is, the better the handling and workability, and the better the clearance into the wall. As shown in FIG. 14, a practical one is to form a composite cross beam in which a wooden core material 3c is fitted inside a metal cross beam 3b.

That is, in the horizontal beam 3 applied to the present invention, a function of absorbing the dimensional variation between the left and right pillars 1 and 1 passing the horizontal beam 3 is necessary. For this reason, the mounting position of the reinforcing hardware 4 on the horizontal beam 3 is It is preferable that construction can be performed on site, and in order to facilitate this, a composite cross beam in which a wooden core 3c is fitted inside a metal cross beam 3b having a long hole 31a shown in FIG. Form.
This makes it easy to adjust the span and achieves the required strength of the horizontal beam, making it possible to narrow the cross-section of the horizontal beam, improving construction support to a true wall with a narrow wall gap, material storage, and workability. Is possible.

The horizontal rail 3 shown in FIG. 15 is provided with metal reinforcing members 38 at both ends of the wooden horizontal rail 3a in a range where at least the reinforcing hardware is attached.
In this case, the left and right metal reinforcing members 38 can be slid in the axial direction with respect to the wooden crosspiece 3a.
That is, the distance between the metal reinforcing members 38 can be changed in accordance with the adjustment of the mounting position of the reinforcing hardware 4.
In addition, the space between the left and right metal reinforcing members 38, 38 is only the rigidity and strength of the wooden crosspiece 3a not reinforced by the metal reinforcing material, but in the configuration of the present invention, the shear of the vertical structural surface to be reinforced is Since the bending moment distribution generated in the horizontal beam 3 at the time of deformation is as shown in FIG. 16, the central portion in the axial direction of the horizontal beam 3 in FIG. 16 generates a small bending moment, and the strength and rigidity of this part are low. However, the structural mechanical property peculiar to the configuration of the present invention, which is not a problem in design, is successfully utilized.

Next, FIG. 17 is a front view showing a second embodiment of the reinforcing structure of the present invention.
In this reinforcing structure, two reinforcing hardwares 4a and 4b are respectively attached to the end of the horizontal rail 3 vertically.
In this way, when the reinforcing hardware 4a and 4b are attached to the top and bottom of the frame 3, higher reinforcement strength can be obtained.
Further, when the upper and lower reinforcing hardwares 4a and 4b are fastened with the bolts 52 and 52, the surface receiving the pulling force of the bolts is increased, and the local deformation of the horizontal beam 3 can be suppressed.
In this way, when two reinforcing hardwares 4a and 4b are attached to the end of the horizontal rail 3 in the vertical direction, the upper and lower reinforcing hardwares 4a and 4b may be made symmetrical using the same hardware, Different hardware may be used for the upper and lower reinforcing hardware 4a and 4b.

  Further, in the reinforcing structure of the present invention, two or more horizontal beams 3 can be arranged between the columns 1 and 1, which is stronger than the one having the single horizontal beam 3 disposed. Surface reinforcement can be performed.

In addition, although the compressive strength is determined by the buckling strength of the inclined piece, particularly the reinforcing performance of the reinforcing hardware in the reinforcing structure of the present invention, the seismic reinforcing member applied to the wooden building is sheared to 1/15 radians. It is important to stick to the deformation (building collapse limit) without breaking the column, and the initial stiffness to 1/120 radian shear deformation is also important.
That is, in order to make full use of the characteristic that the reinforcement hardware is a metal, the deformation characteristics are as follows: 1) the buckling moment Mc of the reinforcement hardware is smaller than the column breakage moment Mw, and 2) until 1/120 radian deformation. It is preferable to have no buckling.

FIG. 18 shows the results of an in-plane shear characteristic experiment of the reinforcing structure of the present invention. (Model with a shaft height of 273cm)
The horizontal axis represents shear deformation (radian) 1000 times, and the vertical axis represents the horizontal load.
As can be seen from the load deformation curve diagram of FIG. 18, when an appropriate strength balance is designed in the configuration of the present invention, the initial rigidity is substantially linear until 1/120 radian shear deformation (8 on the horizontal axis scale in FIG. 18). The load increases, the curve begins to fall a little, and the load gradually increases without breaking the column until 1/15 radian deformation (67 on the horizontal axis scale in FIG. 18) (depending on the experimental conditions, the load is almost constant after buckling). It is possible to obtain very favorable characteristics in terms of seismic performance.

That is, the buckling moment Mc of the reinforcing hardware is made smaller than the column breakage moment Mw to be the weakest part of the constituent member of the present invention, and the deformation condition can be at the maximum deformation (1/15 radian deformation).
Furthermore, it is desirable that the initial rigidity is secured to 1/120 radians within the elastic deformation, and the deformation ratio with respect to the maximum deformation is 120/15 = 8.
After all, by setting the buckling moment Mc of the reinforcing hardware to (Mw / 8) ≦ Mc ≦ Mw, it is possible to obtain a reinforcing hardware having the most desirable strength characteristics.

The following are examples of specific numerical values.
Assuming that the pillar of the vertical construction surface to be reinforced is cedar with a cross section b = 10.5 cm square,
Column section modulus Z = b ³ /6=192.9 cm ³
The allowable bending stress σ ^ba of cedar is σ ^ba = 2200 N / cm ² ,
Column bending breaking moment Mw = Z · σ ^ba = 424 kN · cm
Therefore,
The buckling moment Mc that the reinforcing hardware should have is from 424/8 = 53, 53 ≦ Mc ≦ 424 (kN · cm)
In addition, the design of the horizontal beam may be a normal design having sufficient strength, and is not the main point of the present invention, and thus the description thereof is omitted.

With the above configuration of the present invention, in the in-plane shear test results,
a) Yield yield strength Py: 9.65 kN
b) Multiply the ultimate strength Pul by (0.2 / Ds): 8.14 kN
c) 2/3 of the maximum load Pmax: 12.08 kN
d) Load at 1/120 rad: 7.69 kN
Got. This is 4.3 in terms of wall magnification, and a high performance exceeding the wall magnification of 2.5 obtained with a general structural plywood can be realized.

As described above, the reinforcing structure of the present invention can be installed in the frame of the frame member forming the vertical structural surface, and the vertical structural surface is utilized by utilizing the buckling characteristics of the reinforcing hardware made of the ductile material. The frame structure will not break even during the maximum deformation of the frame (preventing collapse at once), and the variation in the distance between the columns can be absorbed at the mounting position of the horizontal beam and the reinforcement hardware. It can be easily applied to the field, and can be applied to column beams that have undergone some deformation, improving the shear deformation resistance of the vertical structural surface made of the frame structure of the building, and further balancing the entire building It is possible to install by selecting a place that takes into account, greatly improving the earthquake resistance of wooden buildings.
In particular, it can easily improve the rigidity and strength of the vertical construction surface of existing buildings, contributing to the enhancement of earthquake resistance.

The front view which shows 1st Example of the reinforcement structure of the wooden building of this invention. The Example of a reinforcement metal fitting is shown, (A) is a front view, (B) is AA sectional drawing of (A). The Example of a reinforcement metal fitting is shown, (A) is a front view, (B) is BB sectional drawing of (A). The Example of a reinforcement metal fitting is shown, (A) is a front view, (B) is CC sectional drawing of (A). The Example of a reinforcement metal fitting is shown, (A) is a front view, (B) is DD sectional drawing of (A). The schematic structure figure of the reinforcement structure using a reinforcement link and a crosspiece. The schematic structure figure of the reinforcement structure using the reinforcement link and horizontal crosspiece in this invention. The perspective view which shows the Example of a crosspiece. Sectional drawing which shows the Example of a crosspiece. Sectional drawing which shows the Example of a crosspiece. The perspective view which shows the Example of a crosspiece. Sectional drawing which shows the Example of a crosspiece. The front view which shows the Example of a crosspiece. The perspective view which shows the Example of a crosspiece. The perspective view which shows the Example of a crosspiece. The figure which shows the bending moment distribution characteristic of a crosspiece. The front view which shows 2nd Example of the reinforcement structure of the wooden building of this invention. The figure which shows the example of the result of the in-plane shear characteristic experiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pillar 10 Longitudinal surface 20 Beam 21 Base 3 Horizontal beam 3a Wooden horizontal beam 3b Metal horizontal beam 3c Wooden core 3d Horizontal beam edge part 4 Reinforcement metal 4a Reinforcement metal 4b Reinforcement metal 30 Horizontal surface 31 Through hole 31a Through hole 35a Outside Horizontal beam 35b Inner horizontal beam 36a Long hole 36b Round hole 36c Bolt 37 Metal outer material 38 Metal reinforcing material 40 Vertical mounting piece 41 Horizontal mounting piece 42 Oblique piece 42a Standing upper part 42b Standing upper part 42c Standing upper part 42d Standing upper part 42e 43a Space 43b Space 44 Mounting hole 45 Mounting hole 49 Reinforcement link 49a Reinforcement link 49b Reinforcement link 50 Screw 51 Screw 52 Bolt 90 Reinforcement hardware 91 Reinforcement hardware S Gap

Claims (7)

It is a reinforcement structure for a vertical construction surface with a pair of left and right columns of a wooden frame building and a horizontal member orthogonal to the columns,
A horizontal rail passed between the pair of pillars, and reinforcing hardware attached to both ends of the horizontal rail,
The reinforcement hardware was passed between the vertical mounting piece and the horizontal mounting piece attached to the vertical surface and the horizontal mounting surface that form a right angle surface between the pillar and the horizontal rail, and the vertical mounting piece and the horizontal mounting piece. Formed with oblique pieces,
The oblique piece is formed in a buckled reinforcing structure having a concavo-convex shape or a rib or a flange,
The vertical mounting piece is attached to the vertical surface through at least two mounting holes arranged in the vertical direction of the column,
The lateral mounting piece is attached to the lateral surface through at least two mounting holes disposed in the axial direction of the horizontal rail,
And the reinforcement structure of the wooden frame structure characterized by the said horizontal beam being formed shorter than the dimension between pillars, and the clearance gap being formed between the both ends of a horizontal beam, and a column.   2. The reinforcing structure for a wooden frame building according to claim 1, wherein the horizontal beam is a wooden horizontal beam having a square cross section.   2. The reinforcing structure for a wooden frame building according to claim 1, wherein the horizontal beam is a metal horizontal beam having a square or substantially U-shaped cross section. 4. The reinforcement structure according to claim 3, wherein at least one of the reinforcement hardware attached to both ends of the metal crosspiece is attached to the metal crosspiece so as to be movable in the axial direction . Reinforced structure. 4. The reinforcing structure according to claim 3, wherein the metal crosspiece is formed to be adjustable in length by an outer side crosspiece and an inner side crosspiece fitted in the outer side crosspiece so as to be slidable in the axial direction . Reinforcement structure for wooden frame buildings.   6. The reinforcing structure for a wooden frame building according to claim 3, 4 or 5, wherein a wooden core material is fitted inside the metal cross rail.   3. The reinforcing structure of a wooden frame building according to claim 2, wherein a metal reinforcing material having a square cross section or a substantially U-shaped cross section is attached to at least a reinforcing bar of the wooden horizontal rail.

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