JP2018162602A - Joint metal and joint structure of wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint metal which can exhibit stable energy absorption performance suppressing the slip property and does not require time for finishing the wall.SOLUTION: The metal joint 10 includes a first connecting portion 11 connected to an upper end portion and/or a lower end portion of the wall 1, a deformable portion 12 capable of absorbing energy by plastic deformation, and a second connecting portion 13 connected to an upper structure 2 and/or lower structure 3, in which The deformable portion 12 is constituted by the first twisted plate 12 twisted around the deformation axis, and the first connecting portion 11 is provided at one end portion of the deforming portion 12 and the second connecting portion 13 is provided at the other end portion, and the deformed portion 12 of the metal joint 10 is inserted into each of the holes provided on the upper end surface and/or the lower end surface of the wall 1, the first connecting portion 11 is inserted and connected from the bottom surface of each hole 16 inside the wall 1, and the second connecting portion 13 is connected to the upper structure 2 and/or the lower structure 3, respectively.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a joint metal and a wall joint structure.

Brace material installed diagonally to increase the strength and rigidity of quadrilateral construction formed by columns, beams, etc., corner reinforcements installed diagonally across the corner, etc. The thing of patent document 1 is known as an example of the diagonal material for reinforcement.
This reinforcing diagonal member is installed obliquely with respect to a quadrilateral construction surface formed of columns, beams, etc., and is composed of a twisted plate formed by twisting an elongated flat plate into a spiral shape. Yes.
In such a reinforcing diagonal member, it is possible to provide a reinforcing diagonal member adapted to the application place by changing the twist pitch of the twist plate and adjusting the rigidity.

Moreover, the thing of patent document 2 is known as an example of the connection metal fitting used in order to install a column in cross members, such as a base and a beam.
This connecting metal fitting has a root portion embedded in a shaft hole formed in a cross member, and a pin hole for inserting a drift pin inserted from a column end surface into a slit formed in the axial direction and driven from a side surface of the column The said insertion board has the window which cut out the inside in the range from the said pin hole to the said root part.
When a building using such a connecting bracket encounters an earthquake and a load is applied in the direction that separates the cross member from the column, stress concentrates on the corners of the window, causing plastic deformation at an early stage. Therefore, energy can be absorbed efficiently, and the vibration control can be exhibited smoothly.

Moreover, in various wooden structures, the thing of patent document 3 is known as an example of the hozo pipe for connecting members, such as a foundation, a pillar, a pillar, and a horizontal member.
This hozo pipe is a hollow rod-shaped and embedded so as to penetrate the boundary between one material and the other material, and a side surface has a first pin hole for inserting a drift pin, a bolt or the like driven from one material. A second pin hole for inserting a drift pin, bolt or the like driven from the other material, and the entire circumference is curved in a radial direction between the first pin hole and the second pin hole. An extended part is provided.
In such a hozo pipe, when a tensile load is applied, the stress locally increases around the extended portion, which easily causes elasto-plastic deformation. Therefore, when an excessive load is applied in the direction of separating the two members due to an earthquake or the like, the impact is alleviated and damage to buildings and the like can be reduced.

JP 2010-47948 A Japanese Patent No. 5451549 Japanese Patent No. 5451561

  By the way, in the case of a solid wall such as a wall made of timber panels made of orthogonal laminated boards or laminated timber, the wall itself can hardly be expected to be deformed, and the wall can be used for lower structures such as floors and foundations, floors and beams, etc. Deformation performance needs to be ensured by a metal fitting to be joined (fastened) to the upper structure. In a conventional wall-joining structure using a cross laminated plate (CLT) wood panel, the joint hardware folded in a U-shape is joined to the wall and the upper and lower structures, that is, the opposite of the joint hardware. The upper and lower parts of the wall are sandwiched between a pair of pieces, and a nail is driven into the wall from the piece to join the nail, and the connecting piece connecting the pair of pieces of the joint hardware is vertically structured. In general, the connecting piece is joined to the structure with a bolt after contacting each object.

When a seismic force is applied to the wall in the horizontal direction, a force acts on the joint hardware in an attempt to cause a rigid rotation (rocking) of the wall. Therefore, when a seismic force is applied to the wall repeatedly, a nail joint that connects the joint hardware and the wall. Due to the destruction of the wall, there is a problem that the entire wall joining structure exhibits slip properties and cannot secure sufficient energy absorption performance.
In addition, since the pair of pieces of the joint hardware and the nail heads of nails driven from these pieces protrude from the front and back surfaces of the wall, there is a problem that the labor for finishing the wall becomes large.
On the other hand, the diagonal member for reinforcement described in Patent Document 1 described above does not join the wall and the upper and lower structures, and the connecting metal fittings and hozo pipes described in Patent Documents 2 and 3 are not provided on the wall. Therefore, it cannot be applied directly to the wall joint structure because there is a problem of insufficient load resistance.

  The present invention has been made in view of the above circumstances, and exhibits a stable energy absorption performance that suppresses slip properties against repeated seismic forces, and uses a metal fitting that does not require time and effort to finish a wall. An object of the present invention is to provide a wall joining structure.

In order to achieve the above object, a metal fitting according to the present invention is a metal fitting for bonding the wall to an upper structure located above a wall and / or a lower structure located below the wall,
A first connection portion connected to the upper end portion and / or the lower end portion of the wall; a deformation portion capable of absorbing energy by plastic deformation; and a second connection portion connected to the upper structure and / or the lower structure. And
The deformable portion is constituted by a first torsion plate twisted around the deformation axis along the deformation axis;
The first connecting portion is provided at one end portion along the deformation axis of the deforming portion, and the second connecting portion is provided at the other end portion.

The wall joining structure of the present invention is a wall joining structure in which a wall is joined to the upper structure located above the wall and / or the lower structure located below the wall by the joining hardware. ,
Holes extending in the vertical direction are provided at both ends of the upper end surface of the wall and / or the lower end surface of the wall,
The deformed portion of the bonding hardware is inserted into each hole, and the first connection portion is inserted and connected to the inside of the wall from the bottom surface of each hole, and is connected to the upper structure and / or the lower structure. The second connection portion is connected.

  Here, as the wall, for example, a wall made of a wood panel such as an orthogonal laminated board or a laminated board and having a solid inside is mentioned, but the wall is not limited to this. For example, it may be a reinforced concrete wall panel or a wooden wall panel in which reinforcing plates such as plywood are fixed on both front and back sides of a rectangular frame. In the case of a wooden wall panel in which a reinforcing plate is fixed to the frame body, the hole may be provided in the vertical frame material of the frame body, and the first connection portion may be connected to the vertical frame material from the bottom surface of the hole. The wall is applied as a load-bearing wall or a damping wall, and the function of the support wall may be used in combination.

  In the present invention, when the wall rises due to the rigid rotation (rocking), that is, the wall rises to one corner on the upper end side and the other corner on the lower end side among the four corners of the wall due to locking. When one of the corners on the upper end side of the wall is spaced downward with respect to the upper structure, this also lifts up), so that the second connection portion of the joint hardware is connected to the upper structure and the lower structure. Since the connected first connecting portion is connected to the wall, the first torsion plate, which is a deformed portion of the joint metal provided at the both corners, is pulled and stretched in the direction of the deformation axis to be plastically deformed. In addition, stable energy absorption performance can be exhibited while ensuring rigidity and proof stress. On the other hand, the other corner on the upper end side of the wall where no lifting occurs and the one corner on the lower end side abut against the upper structure and the lower structure, respectively, and receive a bearing resistance. A compressive force hardly acts on the metal joints provided at both corners. For this reason, even if the rigid body rotation of the wall is repeatedly performed, the deformed portion 12 of the metal joint is repeatedly deformed between the state before the deformation and the extended state, and the widening (deformation) of the deformed portion of the metal joint is performed. Bulging in a direction intersecting the axis) can be prevented, and buckling of the deformable portion can be prevented while avoiding interference of the deformable portion with the inner peripheral surface of the hole. By such a mechanism, the wall to which the joint structure using the joint metal of the present invention is applied can ensure the energy absorption performance by the stable hysteresis characteristic with the slip property suppressed.

  In addition, a deformed portion of the joint metal fitting is inserted into each of the holes provided to extend in the vertical direction at both ends of the upper end surface and / or the lower end surface of the wall, and the first connection portion is provided in each of the holes inside the wall. Since it is inserted from the bottom and connected, the deformed part and the first connecting part of the joint hardware do not protrude from the wall surface of the wall and are built in the wall, reducing the wall finishing effort. can do.

  The said structure of this invention WHEREIN: The said 1st connection part may be comprised by the screw-shaped member. In this case, it is preferable to provide a pilot hole on the bottom surface of each hole provided at both ends of the upper end surface of the wall and the lower end surface of the wall. Moreover, although a lag screw is used suitably as a screw-shaped member, it is not restricted to this, A wood screw etc. may be sufficient.

  According to such a configuration, the metal fitting can be easily and reliably fixed to the wall by screwing the screw-like member as the first connection portion into the wall from the bottom surface of each hole.

  In the configuration of the present invention, the first connecting portion may be constituted by a second twisted plate that is twisted around the deformation axis along a deformation axis that is coaxial with the deformation axis of the first torsion plate. Good.

  According to such a configuration, since the first connecting portion is constituted by the second torsion plate twisted around the deformation axis coaxial with the deformation axis of the first torsion plate, the second torsion plate is replaced with the first torsion plate. It can be formed continuously. Therefore, it becomes easy to manufacture the joint hardware, and the performance is stabilized, and further, the rigidity and the proof stress of the first connection portion can be easily secured.

  In the configuration of the present invention, a twist angle per unit length of the second twist plate may be different from a twist angle per unit length of the first twist plate.

  Here, the twist angle of the torsion plate is an angle when the torsion plate is twisted around its deformation axis. For example, the twist when the flat plate before twisting is twisted once around the deformation axis. The angle is 360 °.

  According to such a configuration, since the torsion angles per unit length of the first torsion plate and the second torsion plate are different, by appropriately adjusting these torsion angles, the energy absorption capacity required for the first torsion plate, The rigidity and proof stress can be adjusted, and the rigidity, proof strength and connection resistance to the wall required for the second torsion plate (first connecting portion) can be adjusted.

  In the configuration of the present invention, the deformation portion is connected to the first deformation portion twisted to one side around the deformation axis, and is connected in the axial direction of the first deformation portion and the deformation axis. You may provide the 2nd deformation | transformation part twisted to the other side around.

  According to such a configuration, the direction in which the first deformable portion is twisted is opposite to the direction in which the second deformable portion is twisted. For this reason, the first deforming portion and the second deforming portion are deformed while the portion between the first deforming portion and the second deforming portion rotates around the deformation axis. Thereby, the energy absorption load (the load acting in the direction that prevents the change in the relative position between the first connection portion and the second connection portion) can be stabilized.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to exhibit the energy absorption performance by the stable hysteresis characteristic which suppressed slip property with respect to repeated seismic force, the finishing effort of a wall can be reduced.

FIG. 3 is a front view of the wall joint structure according to the first embodiment of the present invention, seen through. FIG. It is process drawing for demonstrating the method to install a metal joint to a wall and the method to join a wall to a structure, and is the front which shows the state before joining a wall to a lower structure. It is a front view which shows the state which joined the wall to the lower structure same as the above. It is a front view which shows the state which joined the upper structure to the wall. It is a front view which shows the state which the floating (rocking) by rigid body rotation produced in the same wall. It is a front view which sees through and shows the joining structure of the wall which concerns on the 2nd Embodiment of this invention. It is a transparent front view which shows the joining structure of the wall which concerns on the 3rd Embodiment of this invention. The modification of the metal joint in the 3rd Embodiment of this invention is shown, (a) is a front view of a 1st modification, (b) is a front view of a 2nd modification. 2A and 2B show analysis models for analyzing the deformation characteristics of the deformed portion of the joint metal fitting according to the present invention, in which FIG. 1A shows a case where the twist angle θ is 360 °, and FIG. 2B shows a case where the twist angle θ is 540 °. FIG. It is a graph which shows the result of having analyzed the deformation property of the deformation part of the joint metal object concerning the present invention. FIG. 10 is a front view showing a wall joining structure according to a fourth embodiment of the present invention in perspective. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a front view showing a wall joining structure according to the first embodiment as seen through, and FIG. 2 is a side view thereof. In FIGS. 1 and 2, the metal joint 10 provided inside the wall 1 is indicated by a solid line.

As shown in FIGS. 1 and 2, the wall 1 is made of a wood panel such as an orthogonal laminated board or laminated wood, and the inside is a solid wall. An upper structure 2 is provided above the wall 1 and a lower structure 3 is provided below the wall 1. The upper structure 2 is, for example, a floor or a beam, and the lower structure 3 is, for example, a foundation, a floor, or a beam.
Bonding hardware 10 is provided at each of the four corners of the wall 1, that is, at both ends of the upper end surface of the wall 1 and both ends of the lower end surface of the wall 1.
The metal joint 10 is for joining the wall 1 to the upper structure 2 and the lower structure 3, and includes a first connection portion 11, a deformation portion 12, and a second connection portion 13.

The 1st connection part 11 is comprised by the screw-shaped member. Specifically, the 1st connection part 11 is comprised by the lag screw.
The deformation portion 12 is configured by a first twist plate 12 that is spirally twisted around the deformation axis L1 along the deformation axis L1. The first torsion plate 12 is capable of absorbing energy by plastic deformation at least partially with respect to a load acting in the longitudinal direction (direction of the deformation axis L1). The first torsion plate 12 is formed by being twisted by applying torsion processing or the like to a plate-shaped steel plate material.

  The second connection portion 13 is formed in a cubic box shape or a rectangular parallelepiped box shape, and an opening is formed on the front side so that a tool such as a wrench can be inserted. A through hole for inserting an anchor 14 using an anchor bolt is formed in the wall portion. One end portion of the anchor 14 is inserted into the through hole, and a nut 14a is screwed into the one end portion inside the second connection portion 13.

  And the 1st connection part 11 is being fixed to the one end part along the deformation | transformation axis L1 of the deformation | transformation part (1st twist board) 12 by welding etc. coaxially with the deformation | transformation axis L1. In addition, the second connecting portion 13 is fixed to the other end portion along the deformation axis L1 of the deformable portion (first torsion plate) 12 by welding or the like.

The joining structure of the wall 1 using such a joining metal fitting 10 is configured as follows.
That is, notches 15 having a rectangular shape in front view are provided at both ends of the upper end surface of the wall 1 and both ends of the lower end surface of the wall 1. That is, a total of four notches 15 are provided at the four corners of the wall 1. The notch 15 opens to the front and back sides and side end surfaces of the wall 1, and the left and right width W 1 of the notch 15 is equal to or greater than the left and right width W 2 of the second connection portion 13. Further, the depth H1 of the notch 15 is equal to or greater than the height H2 above and below the second connection portion 13. Furthermore, the width T <b> 1 in the thickness direction of the wall 1 of the notch 15 is equal to or greater than the width T <b> 2 in the thickness direction of the wall 1 of the second connection portion 13.

The surfaces of the upper end portion and the lower end portion of the wall 1 formed by the notch portion 15 are referred to as a bottom surface C of the notch portion 15. A hole 16 extending in the vertical direction of the wall 1 is provided on the bottom surface C of the notch 15. The hole 16 is formed in a circular shape in cross section, and the inner diameter thereof is slightly larger than the maximum diameter of the deformed portion (first torsion plate) 12 of the metal joint 10, and the depth H3 of the hole 16 (the vertical direction of the wall 1). Is substantially equal to the length of the deformation portion (first torsion plate) 12 in the deformation axis direction.
The hole 16 serves as a buckling restricting portion of the deformable portion (first torsion plate) 12, and the deformable portion (first torsion plate) 12 faces the outer peripheral edge of the hole 16 to the inner peripheral surface of the hole 16. In addition, by being inserted with a predetermined gap from the inner peripheral surface, buckling of the deformable portion (first torsion plate) 12 against the compression axial force is prevented.
In addition, a pilot hole P for screwing the first connection portion (lag screw) 11 is provided on the bottom surface U of the hole 16 coaxially with the hole 16.

And the deformation | transformation part (1st torsion board) 12 of the joining metal fitting 10 is each inserted in each hole 16, and the 1st connection part (lag screw) 11 is screwed in the pilot hole P provided in the bottom face U of the hole 16. Yes. Further, the second connection portion 13 of the metal joint 10 is disposed in the notch portion 15, and the second connection portions 13 provided on both end sides of the upper end surface of the wall 1 are in contact with the upper structure 2, The second connecting portions 13 provided on both end sides of the lower end surface of the wall 1 are in contact with the lower structure 3.
The second connection portions 13 provided on both end sides of the upper end surface of the wall 1 are fixed to the upper structure 2 by anchors 14, and the second connections provided on both end portions of the lower end surface of the wall 1. The portion 13 is fixed to the lower structure 3 by an anchor 14.
Further, a plurality of shear keys 18 are inserted into the upper end surface of the wall 1 and the lower surface of the upper structure 2, and a plurality of shear keys 18 are inserted into the lower end surface of the wall 1 and the upper surface of the lower structure 3. A plurality of shear keys 18 are arranged at predetermined intervals in the width direction of the wall 1, and a shearing force is transmitted between the wall 1 and the upper and lower structures 2 and 3.

Next, a method for joining the wall 1 to the upper structure 2 and the lower structure 3 will be described.
First, as shown in FIG. 3, the joint hardware 10 is provided at each of the four corners of the wall 1. In this case, the first connecting portion 11 and the deforming portion (first twisted plate) 12 are inserted into the hole 16 from the notches 15 provided at the four corners of the wall 1, and the first connecting portion 11 is further connected to the bottom surface of the hole 16. The joining hardware 10 is fixed to the wall 1 by screwing into the prepared hole P provided in U. In this state, the deformable portion (first twisted plate) 12 is inserted into the hole 16 with a predetermined gap between the inner peripheral surface, the second connecting portion 13 is provided in the notch portion 15, and The upper surface of the second connection portion 13 on both ends of the end surface is flush with the upper end surface of the wall 1, and the lower surface of the second connection portion 13 on both ends of the lower end surface of the wall 1 is the surface of the lower end surface of the wall 1. It is one.
In addition, one end of each of the plurality of shear keys 18 is inserted into the upper end surface and the lower end surface of the wall 1, and the anchor 14 is protruded from the lower structure 3, with the upper end protruding from the upper surface of the lower structure 3. Insert and fix.

  Next, as shown in FIG. 4, the wall 1 is suspended by a crane and installed on the upper surface of the lower structure 3. In this case, the upper end portion of the anchor 14 protruding from the upper surface of the lower structure 13 is inserted into the second connection portion 13, and the other end portion (lower end portion) of the shear key 18 is placed on the upper surface of the lower structure 3. The wall 1 is installed on the upper surface of the lower structure 3 so as to be inserted into the formed groove S. Next, the nut 14a is inserted into the second connection portion 13 through the opening of the second connection portion 13, screwed into the upper end portion of the anchor 14, and the nut 14a is tightened with a tool such as a wrench, thereby The connecting portion 13 is connected to the lower structure 3. Thus, the wall 1 is bonded and fixed to the lower structure 3.

Next, as shown in FIG. 5, the upper structure 2 is suspended by a crane and installed on the upper end surface of the wall 1. In this case, the upper structure 2 is installed on the upper end surface of the wall 1 so that the other end portion (upper end portion) of the shear key 18 is inserted into the groove S formed on the lower surface of the upper structure 2. Next, the anchor 14 is inserted into the through-hole provided in the upper structure 2 from the upper surface of the upper structure 2 and the lower end portion of the anchor 14 is inserted into the second connection portion 13. 2 The nut 14a is inserted into the second connection portion 13 from the opening of the connection portion 13, screwed into the lower end portion of the anchor 14, and the nut 14a is tightened with a tool such as a wrench to thereby fix the upper structure 2 to the wall. Bonded and fixed to the upper end surface of 1. As a result, the wall 1 is bonded and fixed to the upper structure 2.
When no upper floor is provided above the upper structure 2, the nut 14 a is screwed onto the upper end portion of the anchor 14 protruding from the upper surface of the upper structure 2 with a washer 14 b interposed therebetween and tightened. On the other hand, when an upper floor is provided above the upper structure 2, the upper floor wall 1 is installed on the upper structure 2 and fixed to the anchor 4 as shown in FIG. 1. In this case, the upper structure 2 is used as the lower structure, and the upper floor wall 1 is joined and fixed to the lower structure in the same manner as described above.

In the joining structure of the wall 1 constructed in this way, as shown in FIG. 6, when the seismic force F acts on the wall 1 in the horizontal direction and the wall 1 is lifted by rigid rotation (rocking), That is, among the four corners of the wall 1, it floats to one (right) corner on the upper end side and the other (left) corner on the lower end side (one corner on the upper end side of the wall 1). Part is separated downward with respect to the upper structure 2, but this is also lifted), the second connecting portion 13 of the right joint 10 on the upper end side of the wall 1 is connected to the upper structure 2. The first connecting portion 11 is connected to the wall 1, the second connecting portion 13 of the left joint 10 on the lower end side of the wall 1 is connected to the lower structure 3, and the first connecting portion 11 is a wall 1, the first torsion plate 12, which is the deformed portion 12 of the joint hardware 10, 10, is pulled to extend in the direction of the deformation axis. Plastic deformation Te, while ensuring the rigidity and strength, can exhibit a stable energy absorption performance.
On the other hand, the other (left) corner on the upper end side of the wall 1 where no locking is generated and the one (right) corner on the lower end side contact the upper structure 2 and the lower structure 3, respectively. By contacting and receiving the bearing resistance R, the compressive force hardly acts on the metal joints 10 and 10 provided at both corners. For this reason, even if the rigid body rotation of the wall 1 is repeatedly performed, the deformed portion 12 of the metal joint 10 only repeats deformation between the state before the deformation and the stretched state. It is possible to prevent buckling of the deformable portion 12 while preventing widening of the deformable portion 12 (swelling in a direction intersecting the deformation axis) and avoiding interference with the inner peripheral surface of the hole 16 of the deformable portion 12. . With such a mechanism, the wall 1 can secure energy absorption performance with stable hysteresis characteristics with reduced slip properties against the seismic force F.

Further, the deformed portions 12 of the joint metal fitting 10 are respectively inserted into the holes 16 provided in both ends of the upper end surface of the wall 1 and both ends of the lower end surface of the wall 1 so as to extend in the vertical direction. Since the 1st connection part 11 is inserted and connected from the bottom face U of each hole 16, respectively, the deformation | transformation part 12 and the 1st connection part 11 of the joining metal fitting 10 do not protrude from the wall surface of the wall 1, It will be built inside the wall 1. Therefore, the labor for finishing the wall 1 can be reduced.
Furthermore, since the 1st connection part 11 is comprised by the lag screw, it can fix to the wall 1 easily and reliably by screwing this lag screw into the inside of the wall 1 from the bottom face U of each hole 16. FIG. .

(Second Embodiment)
FIG. 7 is a front view of the wall joint structure according to the second embodiment seen through. In FIG. 7 as well, the joint hardware provided inside the wall is indicated by a solid line.
Since the joint metal and wall joint structure according to the present embodiment is different from the first embodiment in the configuration of the deformed portion of the joint hardware 20, this difference will be described below and the first embodiment will be described. The same reference numerals are given to the same configuration as the form, and the description thereof is omitted or simplified.

In the present embodiment, the deformable portion 22 has a longer length in the deformation axis direction than the deformable portion 12 in the first embodiment, and the first deformable portion 22a twisted to one side around the deformable axis, The first deformable portion 22a is connected to the axial direction of the deformed axis, and the second deformable portion 22b is twisted to the other side around the deformed axis.
That is, the deforming portion 22 is formed symmetrically across a bisector L2 that bisects the deforming portion 22 in the direction of the deformation axis. One end of the deformable portion 22 in the longitudinal direction is fixed to the first connecting portion 11, and the other end is fixed to the second connecting portion 13.
Further, in the deformable portion 22, a portion (second deformable portion 22 b) between the first connecting portion 11 and the bisector L <b> 2 is helically twisted in the counterclockwise direction when viewed from the first connecting portion 11 side. The portion between the second connecting portion 13 and the bisector L2 (first deforming portion 22a) is twisted spirally in the clockwise direction when viewed from the second connecting portion 13 side. That is, the 2nd deformation part 22b and the 1st deformation part 22a are twisted in the opposite direction.
Further, the length of the hole 16 in the axial direction is longer than that of the hole 16 in the first embodiment so that the entire deformable portion 22 can be inserted.

According to the present embodiment, the same effects as those of the first embodiment can be obtained, and the following effects can be obtained. That is, since the direction in which the first deformation portion 22a of the deformation portion 22 is twisted is opposite to the direction in which the second deformation portion 22b is twisted, the first deformation portion 22a and the second deformation portion 22b The first deforming portion 22a and the second deforming portion 22b are deformed while the portion between them (the portion in the vicinity of the bisector L2) rotates around the deformation axis.
As a result, when the first deformable portion 22a and the second deformable portion 22b are deformed, the local stress increase in the first deformable portion 22a and the second deformable portion 22b is caused by the deformable portion in the first embodiment. This is suppressed as compared to the case of twisting in the same direction as in FIG. As a result, energy absorption load (first connecting portion) is suppressed by suppressing local plasticization due to local stress development and fracture due to fatigue when the first deforming portion 22a and the second deforming portion 22b are repeatedly deformed. 11 and a load acting in a direction that prevents a change in the relative position between the second connecting portion 13 and the second connecting portion 13) can be stabilized.

(Third embodiment)
FIG. 8 is a front view of the wall joint structure according to the third embodiment seen through. In FIG. 8 as well, the joint hardware provided inside the wall is indicated by a solid line.
The difference between the joint structure of the joint metal and the wall according to the present embodiment and the first embodiment is the configuration of the first connection portion 21 of the joint hardware 30. Therefore, this difference will be described below. The same components as those in the embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified.

In the present embodiment, the first connecting portion 21 is in the same direction as the first torsion plate (deformation portion) 12 around the deformation axis along the deformation axis that is coaxial with the deformation axis of the first torsion plate (deformation portion) 12. The second torsion plate 21 is helically twisted, and the maximum diameter D2 of the second torsion plate 21 is substantially equal to the maximum diameter D1 of the first torsion plate 12.
Further, the twist angle θ per unit length L of the second torsion plate 21 is different from the twist angle θ per unit length L of the first torsion plate 12, and the second torsion plate 21 is the first one. The twist angle θ per unit length is larger than that of the twist plate 12. The unit length L may be set as appropriate. Here, L = 3.0D with respect to the maximum diameter D (D1, D2) of the first torsion plate 12 and the second torsion plate 21. Specifically, the twist angle θ per unit length L of the first torsion plate 12 is 360 °, and the first torsion plate 12 is twisted by 540 ° over the entire length of 1.5L. Further, the twist angle of the second torsion plate 21 per unit length L is 720 °, and the second torsion plate 21 is twisted by 720 ° over the entire length of 1.0 L.
A spiral pilot hole P2 that matches the shape of the second torsion plate 21 is formed on the bottom surface U of the hole 16, and the second torsion plate (first connecting portion) 21 is screwed into the pilot hole P2. The joint hardware 30 is connected to the wall 1.

According to the present embodiment, the same effects as those of the first embodiment can be obtained, and the following effects can be obtained.
That is, the second torsion plate (first connection portion) 21 has a larger twist angle θ per unit length L than the first torsion plate 12, that is, the second torsion plate (first connection portion). Since the torsion amount per unit length L of 21 is greater in the first torsion plate 12, the drawing resistance when the second torsion plate (first connecting portion) 21 is screwed into the wall 1 and screwed together Can be increased. Accordingly, the axial length of the second torsion plate (first connection portion) 21 can be reduced as compared with the case where the second torsion plate 21 has the same twist angle θ as that of the first torsion plate 12.

  In the present embodiment, the first twist plate (deformed portion) 12 may be changed to the first twist plate (deformed portion) 22 in the second embodiment.

FIGS. 9A and 9B are front views showing a modified example of the metal joint 30 in the third embodiment.
9A, the torsion angle θ and the length in the deformation axis direction per unit length of the second torsion plate (first connection portion) 21a and the first torsion plate (deformation portion) 12 are the same. Are equal.
According to such a configuration, the second torsion plate (first connection portion) 21a and the first torsion plate (deformation portion) 12 can be formed in the same manner, so that the manufacturing of the joint hardware 10 is compared to the third embodiment. And it becomes easy.

9B, the second twisted plate (first connecting portion) 21a has a smaller twist angle θ per unit length than the first twisted plate (deformed portion) 12a. Further, the first torsion plate (deformation portion) 12a has a larger twist angle per unit length than the first torsion plate (deformation portion) 12 in the third embodiment.
According to such a configuration, the torsion angle θ per unit of the first torsion plate (deformation part) 12a is large, that is, the torsion amount is large, so that the first torsion plate (deformation part) 12a is An increase in yield strength when absorbing plastic energy by plastic deformation can be suppressed.

  As described above, the first torsion plates 12 and 12a can be obtained by making the torsion angles per unit length of the first torsion plates 12 and 12a coincide with the torsion angles of the second torsion plates 21 and 21a or appropriately different from each other. The energy absorption capacity, rigidity and proof stress required for the second torsion plates (first connection portions) 21 and 21a can be adjusted, and the rigidity, proof stress and connection resistance to the wall 1 can be adjusted.

Next, the results of analyzing the deformability (deformation in the axial direction of the deformed portion), rigidity, proof stress, and energy absorption performance of the deformed portion (first torsion plate) by the finite element method will be described.
FIG. 10 shows an analysis model. In this analysis model, the dimension of the deformed portion (first torsion plate) is represented by a width B, a unit length L, a plate thickness t, and a twist angle θ per unit length L. The analysis conditions are as follows.
(1) The end surface on the support point side is coupled to the support point (rotation constraint around the axis) with a rigid beam, and the end surface on the load point side is coupled to the load point (rotation constraint about the axis) with a rigid beam.
(2) A first torsion plate having a width B = 60 mm, a unit length L = 180 mm, and a plate thickness t = 6.0 mm is an object.
(3) A steel plate is applied as the material of the first twisted plate, the physical properties are Young's modulus 205 Gpa, Poisson's ratio 0.3, yield point 200 Mpa, and work hardening after yielding is given by a multi-linear curve.
(4) The influence of the shape is confirmed by setting the twist angle θ per unit length of the first twist plate (twist angle with respect to the unit length L) to 360 ° and 540 °.

The analysis results are shown in FIG. In the graph shown in FIG. 11, the horizontal axis is the ratio (δ / L) of the deformation amount δ to the unit length L of the deformed portion (first torsion plate), and the vertical axis is the tensile yield strength (Ny: cross-sectional area) of the steel plate. Is the ratio (P / Ny) of the load (energy absorption load) P that the deformed portion receives in the axial direction with respect to (multiplied by the yield stress).
As is clear from the graph shown in FIG. 11, the smaller the twist angle θ per unit length of the first torsion plate (deformed portion), the more equivalent to the deformation resistance of the deformed portion at the same deformation amount δ (ratio δ / L). Load P (ratio P / Ny) to be increased.
Therefore, by appropriately adjusting the torsion angle, it is possible to adjust the energy absorption capability, rigidity, and proof stress required for the deformable portion (first torsion plate).

(Fourth embodiment)
FIG. 12 is a front view showing a wall joining structure according to the fourth embodiment as seen through, and FIG. 13 is a side view thereof. In FIG. 12 and FIG. 13 as well, the joint hardware provided inside the wall is indicated by a solid line.
Since the joint metal and wall joint structure according to the present embodiment is different from the first embodiment in the configuration of the first connecting portion 41 of the joint hardware 40, this difference will be described below. The same components as those in the embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified.

In the present embodiment, the first connection portion 41 includes a vertically long rectangular plate-like plate-like member 41 a and a plurality of pins 41 b such as drift pins.
The width D3 of the plate-like member 41a is substantially equal to the maximum diameter D4 of the deformed portion (first torsion plate) 12. Further, a groove P3 for inserting the plate-like member 41a is formed in the bottom surface U of the hole 16, and the plate-like member 41a is inserted into the groove P3. The plate-like member 41a is provided with a plurality of pin holes for inserting the pins 41b at predetermined intervals.
Further, a through-hole penetrating from the surface to the back surface is provided on the surface of the wall 1 facing the groove P3. A plurality of through holes are provided at predetermined intervals in the vertical direction, and are disposed coaxially with the pin holes provided in the plate-like member 41a.
The first connecting portion 41 is connected to the wall 1 by inserting and fixing the pin 41b from the surface side of the wall 1 through the through hole and the pin hole.

According to the present embodiment, the same effects as those of the first embodiment can be obtained, and the following effects can be obtained.
That is, in the first embodiment, since the first connection portion 11 is constituted by a lag screw, when the first connection portion 11 is connected to the wall 1, the hole 16 is rotated while the metal joint 10 is rotated around the axis. It is necessary to screw in the first connection part 11 in consideration of the position of the second connection part 13 in the direction around the axis. Since the 1st connection part 41 is provided with the plate-shaped member 41a and the pin 41b which fixes this to the wall 1, when connecting the 1st connection part 41 to the wall 1, without rotating the joining metal fitting 40 The plate-like member 41a may be inserted into the groove P3 provided in the bottom surface U of the hole 16 and the pin 42b may be inserted. For this reason, there exists an advantage that the positioning of the rotation direction around an axis of the 2nd connection part 13 is easy.

DESCRIPTION OF SYMBOLS 1 Wall 2 Upper structure 3 Lower structure 10, 20, 30, 40 Joint metal | frame 11, 21, 21, 21a, 41 1st connection part 12, 12a Deformation part (1st twist board)
13 2nd connection part 16 hole 21 2nd twist board (1st connection part)
22 deformation part 22a first deformation part 22b second deformation part

Claims (6)

A metal fitting for joining the wall to an upper structure located above the wall and / or a lower structure located below the wall,
A first connection portion connected to the upper end portion and / or the lower end portion of the wall; a deformation portion capable of absorbing energy by plastic deformation; and a second connection portion connected to the upper structure and / or the lower structure. And
The deformable portion is constituted by a first torsion plate twisted around the deformation axis along the deformation axis;
The joint hardware according to claim 1, wherein the first connection portion is provided at one end portion along the deformation axis of the deformation portion, and the second connection portion is provided at the other end portion.   2. The metal joint according to claim 1, wherein the first connection portion is constituted by a screw-like member.   The said 1st connection part is comprised by the 2nd torsion board twisted around the said deformation | transformation axis along the deformation | transformation axis line coaxial with the said deformation | transformation axis line of the said 1st twist board. Bonding hardware.   The metal joint according to claim 3, wherein a twist angle per unit length of the second torsion plate is different from a twist angle per unit length of the first torsion plate.   The deformation portion is connected to the first deformation portion twisted to one side around the deformation axis, and is connected to the first deformation portion and the deformation axis in the axial direction, and is twisted to the other side around the deformation axis. It has 2 deformation | transformation parts, The joining metal fitting of any one of Claims 1-4 characterized by the above-mentioned. A wall joining structure in which a wall is joined to the upper structure located above the wall and / or the lower structure located below the wall by the joining hardware according to any one of claims 1 to 5. And
A hole extending in the vertical direction is provided in the upper end surface and / or the lower end surface of the wall,
The deformed portion of the bonding hardware is inserted into each hole, and the first connection portion is inserted and connected to the inside of the wall from the bottom surface of each hole, and is connected to the upper structure and / or the lower structure. The wall connection structure, wherein the second connection portion is connected.

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