JP2015209643A - Brace hardware and joining structure of wooden building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide brace hardware and a joining structure of a wooden building in which absorption performance of energy inputted into a wooden building is superior, and the reliability of earthquake performance and vibration damping performance can be improved.SOLUTION: Brace hardware 1 includes a plate-like base part 2, a plate-like structural material fixing part 3 extending from the base part 2 and including a mounting hole 3A, a plate-like brace fixing part 5 facing the base part 2 across a gap d through two or more bridge parts 4 and including a mounting hole 5A, and a damping material 6 interposed between the base part 2 and the brace fixing part 5. By using the brace hardware, a structural material fixing part 3 is installed to a column 100 by a wood screw 7, and the brace fixing part 5 is installed to the end of a brace 102 through an insertion hole 2A of the base part 2 by a wood screw 8.

Description

  The present invention relates to a brace fitting and a joining structure of a wooden building using the same, and is particularly used for an earthquake-resistant structure and a damping structure of a wooden building.

  Conventionally, in detached wooden houses, in order to improve seismic resistance, it has been a structure to increase the rigidity and proof strength by fixing reinforcing hardware to pillars and horizontal members (bases, beams, etc.) at the joints. It is common. By adopting a structure in which an elastic body or viscoelastic body is placed against such an earthquake-resistant reinforcement hardware, energy input to the building, such as earthquakes and typhoons, is absorbed and reduced, and the building is prevented from collapsing. Damping-type reinforcement hardware has been proposed. (For example, refer to Patent Document 1).

  The proposed reinforcing hardware is composed of a bracing side hardware fixed to the end of the bracing, a structural material side hardware fixed to the structural material, and an elastic body or viscoelastic body such as rubber interposed between the hardware. In addition, the elastic body or viscoelastic body is a structure integrated with hardware on both sides via an adhesive, and the elastic body or viscoelastic body that is a damping material shears and deforms the energy input to the building. To absorb.

Japanese Patent No. 3684129

  However, the above-mentioned proposed reinforcement hardware may have a reduced adhesiveness between the hardware and the elastic body or viscoelastic body such as rubber due to long-term use. There is a problem that deformation occurs and adhesion is peeled off, so that the elastic body or viscoelastic body cannot absorb energy, and the seismic performance and vibration control performance are greatly reduced.

  Further, since the proposed reinforcing hardware is manufactured by laminating a plurality of hardware and an elastic body or viscoelastic body such as rubber, there is a problem that the manufacturing cost is likely to be high.

  The present invention has been made in view of the above circumstances, and is excellent in the ability to absorb energy input to a wooden building, and can improve the reliability of seismic performance and vibration control performance. The purpose is to provide a structure.

The brace hardware according to the present invention is
A brace fitting attached between a structural member extending in a vertical direction or a horizontal direction of a wooden building and a brace extending in a direction inclined with respect to the structural member,
A plate-like base part, a first attachment hole extending from the base part, and fixed to the structural material by the first fixing member; and one or a plurality of bridge parts A second mounting hole is provided to face the base portion with a predetermined gap, and the bracing fixing portion is fixed to the end of the bracing by the second fixing member, and interposed between the base portion and the bracing fixing portion. With a damped damping material,
A main feature is that the base part and the damping member are provided with an insertion hole through which the second fixing member is inserted from the base part side toward the second mounting hole.

  A structural material, for example, a vertically extending column and a horizontally extending horizontal member (base or beam) are joined together, and a joint structure in which a brace extending in a direction inclined from the structural material is arranged at the joined portion On the other hand, by applying the brace fitting according to the present invention, when energy such as seismic force or wind power is input to the building, the column is displaced in the rotation direction, and tensile force / compression force acts on the brace, it is fixed to the column. The damping member interposed between the base portion extending from the structured fixing portion and the bracing fixing portion fixed to the end of the bracing facing this is subjected to shear deformation and bending deformation to the bridge portion, The energy input to the building is absorbed (consumed) by these deformations.

  In this way, the energy input to the building is absorbed by the bending deformation of the bridge portion in addition to the shear deformation of the damping material, so that the energy that can be absorbed compared to the case of absorbing only by the deformation of the damping material as in the prior art. The amount can be increased, the energy absorption performance is greatly improved, and the reliability with respect to seismic performance and vibration control performance is greatly improved. That is, even when a large amount of energy is input to the building, the same energy is absorbed by both the damping material such as the high damping rubber and the bridge portion, or a larger amount of energy is input to the building and the high damping rubber or the like. Even when the bond with the damping material is peeled off and absorption by the damping material cannot be expected, the remaining bridge portion is plastically deformed to absorb the remaining energy. As a result of the bridge portion acting as a fault tolerance mechanism, energy absorption performance can be sufficiently secured, and reliability with respect to seismic performance and vibration control performance can be secured.

  The bracing fixing portion has a second feature that the bracing fixing pieces bent from one side or both sides of the base portion via one or a plurality of bridge portions are joined to each other at their end portions.

  A third feature is that the bridge portion occupies at least 2% and not more than 60% as a whole with respect to the corresponding width of the base portion.

  By setting the total to at least 2% to 60%, the energy input to the building can be effectively absorbed not only by the damping material but also by the bridge part, and the bond with the damping material peels off due to the input of large energy. The remaining energy can be absorbed by effectively plastically deforming the bridge portion. The bridge portion is preferably at least 3% or more and 50% or less as a whole with respect to the corresponding full width of the base portion. Furthermore, it is more preferable to set it as 5% or more and 30% or less.

A structure of a wooden building in which a structural material extending in the vertical direction and a structural material extending in the horizontal direction are abutted and joined, and a brace extending in a direction inclined from the structural material is arranged at the joint portion,
The bracelet according to claim 1 is used,
The structural material fixing portion is fixed to the structural material by the first fixing member, and the bracing fixing portion is fixed to the side surface of the end portion of the bracing by the second fixing member.

  Of the bracing hardware, the material of the hardware part is a highly rigid member, for example, a metal plate such as a steel plate, a synthetic resin plate such as FRP, or the like. In addition, wood screws, nails or the like are used for the first and second fixing members. As the damping material, a high damping rubber, a viscoelastic body such as polyurethane rubber or butyl rubber, or an elastic body such as natural rubber is used.

  As described above, according to the present invention, the energy input to the building is absorbed by both the deformation of the damping material and the deformation of the bridge portion of the brace according to the present invention. The amount is increased, and the energy absorption performance is improved, and the reliability with respect to the seismic performance and the vibration control performance can be improved.

  In addition, according to the present invention, a brace fitting can be obtained by bending a piece of hardware and interposing a viscoelastic body or elastic body such as high-damping rubber in the interior thereof, thereby reducing manufacturing costs, The production quality can be improved.

The principal part perspective view which shows the state which attached the brace fitting which concerns on this invention to the pillar of a wooden building, and the brace, (A) is a front view showing the mounting state of the brace shown in FIG. 1, (B) is a side view thereof, The perspective view which shows the brace fitting which concerns on this invention, The perspective view which looked at the brace shown in FIG. 3 from the opposite side, Sectional drawing which shows the principal part of the attachment state of the brace shown in FIG. The figure which shows the expansion | deployment state of the hardware unit of the braces shown in FIG. It is explanatory drawing which shows the mode of a deformation | transformation when horizontal force (energy) is input into the structural frame of a wooden building.

  The best mode for carrying out the present invention will be described below with reference to the drawings. In the following explanation, the wooden building is a building in which the structural material frame consisting of the foundation, foundation, pillars, and beams is integrated using hardware joints as in the past, ensuring a certain level of strength and rigidity. Yes.

  As shown in FIG. 1 and FIG. 2, in a wooden building, a pillar 100, which is a structural material extending in the vertical direction, and a base 101, which is a structural material extending in the horizontal direction, are butted in an inverted T shape and joined together. A brace 102 extending in a direction inclined from the column 100 and the base 101 is in contact with the joint portion, and the brace 1 is attached to the end portion 102A of the pillar 100 and the brace 102 at the joint portion. .

  As shown in FIGS. 3 and 4, the brace 1 includes a plate-like base portion 2 and a plate-like column fixing portion (structural material fixing portion) that is bent and extends perpendicularly from one side 2 </ b> A of the base portion 2. 3 and two other sides 2B adjacent to one side 2A of the base unit 2 via a plurality of narrow (three in the illustrated example) bridge units 4 and extending parallel to the base unit 2 with a predetermined gap d. Attenuation held between the base unit 2 and the brace fixing part 5 that are parallel to each other and the metal unit U composed of the plate-like bracing fixing parts 5 that are joined to each other near the center. The structure is provided with a material (for example, high damping rubber) 6. The hardware unit U and the damping material 6 are integrated by vulcanization adhesion.

  Of the brace 1, the material of the hardware unit U is a highly rigid member, for example, a metal plate such as a steel plate, a synthetic resin plate such as FRP, or the like. The damping material 6 may use another viscoelastic body such as polyurethane rubber or butyl rubber, or an elastic body such as natural rubber, instead of the high damping rubber. If an elastic body is used, the effect of maintaining the shape of the bridge portion 4 can be expected.

  The pillar fixing portion 3 of the hardware unit U is provided with a plurality of first mounting holes 3A for fixing the column fixing portion 3 to the side surface of the pillar 100 with a plurality of first fixing members (for example, wood screws) 7. Similarly, the bracing fixing portion 5 includes a plurality of second fixing members for fixing the bracing fixing portion 5 to the side surface of the end portion 102A of the bracing 102 by a plurality of second fixing members (for example, wood screws) 8 from the outside of the base portion 2. 2 A mounting hole 5 </ b> A is opened, and the base portion 2 is provided with a plurality of insertion holes 2 </ b> C through which the plurality of second fixing members 8 are inserted toward the plurality of second mounting holes 5 </ b> A. FIG. 5 shows a state in which the bracing fixing portion 5 is fixed to the side surface of the end portion 102 </ b> A of the bracing 102 by a plurality of second fixing members 8 from the outside of the base portion 2.

  The first and second fixing members 7 and 8 may use nails or the like instead of wood screws.

  The bridge portion 4 has a substantially U-shaped cross section and absorbs energy input to the building together with the damping material 6 due to the deformation. The bridge portion 4 is the center in the width direction of the other side 2B of the base portion 2. And provided at both ends in the width direction. The width of each bridge part 4 has, for example, a width of 0.5 mm or more, and is 2 to 60% as a whole, preferably 3 to 50%, more preferably 5 to the entire width of the other side 2B of the base part 2. The width is set to 30%.

  Each bridge section 4 acts as a fault tolerance mechanism when the damping material 6 is peeled off due to the input of large energy, and effectively plastically deforms to absorb the residual energy. It also serves to increase the reliability of vibration performance.

  The bridge portion 4 has a plurality of holes formed at equal intervals or unequal intervals in the width direction along one side 2A of the base portion 2 so that a bridge portion between the base portion 2 and the bracing fixing portion 5 is formed at the bridge portion. As good as

  The bracing fixing portion 5 is composed of a pair of bracing fixing pieces 5B and 5B extending in parallel with the base portion 2 from both other sides 2B of the base portion 2 via a plurality of bridge portions 4, and one bracing near the center. The dovetail-shaped joint convex portion 5D provided at the end of the other bracing fixing piece 5B is fitted into the dovetail-shaped joint concave portion 5C provided at the end of the fixed piece 5B, and the ends are joined together. doing. By such strong joining, the joint ends of the bracing fixing pieces 5B and 5B are prevented from being pulled out when energy is input, and the stress transmission from the bracing 102 is ensured.

  A plurality of nodes 9 are provided at the bent portions of the base portion 2 and the column fixing portion 3 in order to increase the cross-sectional secondary moment of the brace 1.

  The brace 1 having the above structure is manufactured as follows. That is, from one plate-like high rigidity member such as a steel plate, as shown in FIG. 6, the base portion 2 portion, the column fixing portion 3 portion, the narrow bridge portions 4 portion, and the bracing fixing piece 5B portion are arranged. The remaining parts are cut out by a press, laser, or the like, and a plurality of first attachment holes 3A, second attachment holes 5A, and insertion holes 2C are opened at predetermined positions.

  Next, with respect to the member for the hardware unit U shown in FIG. 6, the column fixing portion 3 portion is bent by 90 degrees from one side 2A of the base portion 2 portion, and a nod 9 is projected and processed. Bending the bracing fixing piece 5B part from the side 2B into an inverted U-shape, leaving a predetermined gap d (see FIG. 3) between the base part 2 and finally with respect to the joint recess 5C at one end, The metal projection unit 5 is obtained by fitting the joint projections 5 </ b> D at the other end and joining the ends. If necessary, an adhesive is applied to the inner surface of the base portion 2 and the inner surface of the bracing fixing piece 5B after the bracing fixing piece 5B is bent.

  Next, the metal unit U is set in a cavity of a mold (not shown), and an unvulcanized high damping rubber material is filled in the gap d between the base portion 2 and the bracing fixing portion 5 of the metal unit U, The mold is heated at a constant temperature for a certain time to vulcanize the unvulcanized high damping rubber material. Further, an insertion hole 6 </ b> A is opened in the damping material 6 immediately below each insertion hole 2 </ b> C of the base portion 2. Thus, the brace 1 which consists of the said structure can be obtained.

  And in order to attach the brace 1 to the joint part of a building, first, while fixing the pillar fixing | fixed part 3 to the pillar 100 with the 1st fixing member 7 through 3A of 1st attachment holes, as shown in FIG. The bracing fixing portion 5 is fixed to the end portion 102A of the bracing 102 by the second fixing member 8 through the second mounting hole 5A from the outside of the base portion 2 through 2C and 6A. As a result, the column 100 and the end portion 102 </ b> A of the brace 102 are coupled via the bridge portions 2 and the damping material 6 of the brace 1.

  In this way, when the column (100) is deformed when energy (horizontal force) P is input to the wooden building and the column 100 is deformed, as shown in FIG. There is a shift (relative displacement) between the base portion 2 extending from the structural member fixing portion 3 and the bracing fixing portion 5 fixed to the end portion 102A of the bracing 102 in opposition thereto. It is eliminated by the deformation of the damping member 6 and each bridge portion 4 interposed between the base portion 2 and the brace fixing portion 5, and energy can be absorbed (consumed).

  In particular, each bridge section 4 is elastically deformed to absorb energy for a small energy input, and the damping material 6 absorbs energy, and for a large energy input, the damping material 6 and the bridge section 4 cooperate to absorb energy. However, when the bond with the damping member 6 is peeled off due to greater energy input, each bridge portion 4 is plastically deformed to absorb the residual energy and act as a fault tolerance mechanism. Therefore, by applying the brace 1, it is possible to greatly increase the reliability with respect to the seismic performance and damping performance.

  In the brace 1 of the present embodiment, the bridge portions 4 are provided at the center in the width direction and at both ends in the width direction of the other side 2B of the base portion 2, but the present invention is not limited to this. For example, only one may be provided at the center in the width direction of the other side 2B of the base part 2, or two may be provided at both ends in the width direction of the other side 2B of the base part 2. In any case, the width of the bridge portion 4 is desirably set to a width of 2 to 60% as a whole with respect to the entire width of the other side 2B of the base portion 2.

  In the brace 1 of the present embodiment, the bracing fixing portion 5 is bent from the base portion 2 to the same side as the bending direction of the column fixing portion 3, but the bracing is performed in accordance with the position of the bracing 102 with respect to the side surface of the column 100. The fixing portion 5 may be bent to the side opposite to the bending direction of the column fixing portion 3.

  Further, the damping material 6 is filled in the gap d between the base portion 2 and the bracing fixing portion 5, but is not limited to the gap d and is disposed so as to cover the periphery of the base portion 2 and the bracing fixing portion 5. May be. Covering the periphery can prevent the brace 1 from being corroded, leading to improved durability.

  The brace of the present invention can also be applied to a box-type brace. In other words, for the box-type brace that can be attached simultaneously in the three directions of the column, horizontal member (beam, foundation), and bracing, the bracing fixing part is parallel to the base part from the base part via the bridge part. The damping material is interposed in the gap between the base portion and the brace fixing portion. Then, the column fixing part and the horizontal member fixing part that are bent 90 degrees from the base part are fixed to the column and the horizontal member with wood screws, respectively, while the bracing fixing part is connected to the end of the bracing with the wood screw etc. through the insertion hole from the base part side. What is necessary is just to fix to a part.

  Thus, by applying the brace 1 of the present invention to the joint between the structural material extending in the vertical direction and the structural material extending in the horizontal direction of the wooden building, the energy input to the wooden building due to an earthquake or a typhoon is attenuated. In addition, it can be absorbed by the bridge portion, thereby improving the energy absorption performance and improving the reliability of the earthquake resistance performance and the vibration control performance.

  The brace fitting according to the present invention can be used as an anti-seismic or vibration-damping hardware attached between the bracing structure and the brace, and can also be applied to hole-down hardware and other hardware.

DESCRIPTION OF SYMBOLS 1 Bracing hardware 2 Base part 2A, 6A Insertion hole 3 Structural material fixing | fixed part 3A 1st attachment hole (1st attachment hole)
4 Bridge portion 5 Bracing fixing portion 5A Second mounting hole (second mounting hole)
5B Bracing fixing piece 5C Joining recess 5D Joining projection 6 Attenuating material 7 First fixing member (first fixing member)
8 Second fixing member (second fixing member)
100 Pillar 101 Base 102 Bracing 102A Bracing End d Clearance U Hardware Unit

The brace hardware according to the present invention is
A brace fitting attached between a structural member extending in a vertical direction or a horizontal direction of a wooden building and a brace extending in a direction inclined with respect to the structural member,
A plate-like base portion, a structural material fixing portion that is provided extending from one side of the base portion , is provided with a first attachment hole, and is fixed to the structural material by the first fixing member ; Extending in parallel so as to face the base portion with a predetermined gap through a plurality of substantially U-shaped bridge portions from both sides , a second mounting hole is provided, A bracing fixing portion fixed to the end portion of the brace by a second fixing member, and a damping material interposed between the base portion and the bracing fixing portion,
A main feature is that the base part and the damping member are provided with an insertion hole through which the second fixing member is inserted from the base part side toward the second mounting hole.

The brace fitting according to the present invention is a single plate-like height cut out by leaving a structural material fixing part on one side of the base part and leaving a bracing fixing piece on both sides of the base part via a bridge part. Using a rigid member, bend the structural material fixing part to one side of the base part so that it can be fixed to the fixing surface of the structural material, and bend each bracing fixing piece in a U shape to both sides of the base part In addition , the second feature is that both ends are joined to each other and a bracing fixing portion extending in parallel is formed so as to face each other with a gap for interposing an attenuation member between the base portion and the base portion .

In the brace metal according to the present invention, a damping material is formed by vulcanizing an unvulcanized high damping rubber member filled in a gap between the base portion and the brace fixing portion in the cavity of the mold . Features.

The bridge portion preferably occupies at least 2% and not more than 60% of the entire corresponding width of the base portion. By setting the total to at least 2% to 60%, the energy input to the building can be effectively absorbed not only by the damping material but also by the bridge part, and the bond with the damping material peels off due to the input of large energy. The remaining energy can be absorbed by effectively plastically deforming the bridge portion. More preferably, the bridge portion is at least 3% or more and 50% or less as a whole with respect to the corresponding full width of the base portion. Furthermore, it is more preferable to set it as 5% or more and 30% or less.

Claims (4)

A brace fitting attached between a structural member extending in a vertical direction or a horizontal direction of a wooden building and a brace extending in a direction inclined with respect to the structural member,
A plate-like base part, a first attachment hole extending from the base part, and fixed to the structural material by the first fixing member; and one or a plurality of bridge parts A second mounting hole is provided to face the base portion with a predetermined gap, and the bracing fixing portion is fixed to the end of the bracing by the second fixing member, and interposed between the base portion and the bracing fixing portion. With a damped damping material,
A brace fitting characterized in that an insertion hole for inserting the second fixing member from the base portion side toward the second mounting hole is provided in the base portion and the damping material.   The brace fitting according to claim 1, wherein the brace fixing portion is formed by joining bracing fixing pieces bent from both sides of the base portion via one or a plurality of bridge portions at their end portions.   The brace brace according to claim 1 or 2, wherein the bridge portion occupies at least 2% or more and 60% or less as a whole with respect to the corresponding total width of the base portion. A structure of a wooden building in which a structural material extending in the vertical direction and a structural material extending in the horizontal direction are abutted and joined, and a brace extending in a direction inclined from the structural material is arranged at the joint portion,
The bracelet according to claim 1 is used,
A structure of a wooden building, wherein the structural material fixing part is fixed to the structural material by the first fixing member, and the bracing fixing part is fixed to the side surface of the end of the bracing by the second fixing member. .

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