JP2011174364A - Joint damper and structure of joint section - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint damper and structure of joint section which can produce excellent damping effect for a brace-mounted frame structure with no limitation to its installation place. <P>SOLUTION: The joint damper 1 includes the first high rigidity member 2 secured to a brace 13 with a fixture (wood screw 5), the second high rigidity member 3 secured to side face 11a of a timber 11 with the wood screw 5, and a platy damping material 4 made from viscoelastic high-damping rubber sandwiched between the first high rigidity member 2 and the opposite part 3a of the second high rigidity member 3, all of the members are integrally-established by cure adhesion. By installing this joint damper 1 in joint section of a wooden frame F, compression force or pull force imposed on the brace 13, when a lateral force acts on the wooden frame F due to any shaking such as an earthquake, is absorbed by shear deformation of the damping material 4 to inhibit shaking of the wooden frame F. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a structure of a joint damper and a joint part used for a wooden building such as a wooden house.

  Conventionally, in detached wooden houses, in order to improve earthquake resistance, it is common to have a structure that increases rigidity by fixing reinforcing hardware to pillars and horizontal members (such as foundations and beams) at the joint. It is. By adopting a structure with a viscoelastic body against such earthquake-resistant reinforcement hardware, vibration-damping reinforcement hardware that absorbs and reduces earthquake vibration and prevents building collapse ("damping hardware" ”And“ Mouth Damper ”have been proposed. (For example, patent document 1).

  The damping metal article described in Patent Document 1 includes a first steel plate fixed to the front surface of the column member, and a second steel plate fixed to the front surface of the horizontal base larger than the first steel plate. Steel plates and damping materials arranged between these steel plates, and these have an integrated structure by bonding. This damping metal has an effect on both the rigidity and the damping performance for a frame structure (open frame) where no bracing is provided, but has a little damping effect for a frame structure provided with bracing. This is presumably because the rigidity of the damping metal is lower than that of the bracing.

  In addition, in the specification of Patent Document 1, the first damper is fixed to the front surface of the bracing, and the second damper is fixed to the front surface of the column member and the horizontal member. However, when this type of joint damper is provided at the crossover, the installation location is limited, for example, it cannot be used at joints where the horizontal members cross each other. There is also a problem of interference with exterior materials such as outer walls and structural plywood.

  Therefore, in order to solve the above-mentioned problems, the applicant has filed a separate application for a joint damper that can be installed in the joint even for various frame structures of bearing walls with braces, and can exhibit a vibration damping effect. (Japanese Patent Application No. 2008-184860).

  The joint damper described in Japanese Patent Application No. 2008-184860 (hereinafter referred to as the prior application) is fixed to the first high-rigidity member that can be fixed to the bracing with a fixing member, the side surface of the column member, and the horizontal surface of the horizontal member. A joint damper in which a damping material is arranged between the second high-rigidity member that can be fixed by a tool and the first and second high-rigidity members and these are fixed integrally.

  In this way, the joint damper of the prior application is a structure that is installed inside the wooden frame, so it can be installed even in joints where the braces are placed on the rack and the horizontal members cross each other. Can absorb the force generated by.

JP-A-2006-336260 (pages 4 to 5, FIGS. 1 and 4)

Here, in the joint damper described in the prior application, the second high-rigidity member is fixed to the side surface of the column member and the horizontal surface of the horizontal member by a fixing tool. Although the yield strength is high with respect to the direction force, the yield strength is low with respect to the force in the pulling direction of the fixture (the pulling direction). In other words, in a normal wooden building, the pillar material and the bracing are configured within 45 degrees, so the force applied to the bracing has a large vertical component, and the fixed part with the horizontal member is the fixed part with the pillar. Compared with, rigidity and proof stress are low.

  In addition, according to the Building Standards Law, the total number of fixtures (screws) that can be used is clearly defined (for example, 5 or 8) for fixing the joint damper to the horizontal member and column member. .

  Therefore, the present invention was devised in order to further improve the rigidity and proof strength of the joint damper of the prior application, and exhibits an excellent vibration damping effect on the frame structure of the load bearing wall provided with braces and the installation location. It is resistant to the force in the pulling direction of the brace without changing the total number of fasteners in the joint, and the rigidity of the joint damper and joint is improved more than before. The purpose is to provide a structure.

  A joint damper according to claim 1 of the present invention is a joint damper used in a joint portion of a wooden frame structure having a horizontal member, a column member, and a brace, and is fixed to the brace by a fixture. The first high-rigidity member, the damping material having viscoelasticity, the one side part fixed to the side surface of the column member by a fixing tool, and the first high-rigidity member facing the first high-rigidity member And a second high-rigidity member having a facing portion, which are laminated and fixed together.

  According to this configuration, when a force is applied from the lateral direction to the wooden frame of the load-bearing wall where the bracing is provided, the damping material braces the force that acts on the bracing that causes the most stress concentration. Can be absorbed by shear deformation in the compression direction or tension direction. That is, the energy caused by shaking such as an earthquake or strong wind received by the building can be absorbed by the shear deformation of the damping material, and the shaking of the building can be suppressed.

  Moreover, since the joint damper of the present invention has a structure that is installed inside the wooden frame, it can be installed even in joints where horizontal members intersect, there are few restrictions on the installation location, and the outer wall and Interference with exterior materials such as structural plywood can also be avoided.

  Furthermore, since the joint damper of the present invention can be fixed and attached only to the brace and the brace, unlike the conventional joint damper, other than the corner of the wooden frame, for example, a position moved slightly upward from the corner. It can be installed and there are fewer restrictions on the installation location.

  Further, as described above, the joint damper according to the present invention is not fixed to the horizontal member, but is fixed only to the brace with the column member. Therefore, it is used for fixing the horizontal member in the conventional joint damper. The fixing tool (number) that has been used can be turned to the fixing tool (number) used for fixing to the pillar material, and used to fix the joint damper and the pillar material without changing the overall number of fixing tools. The number of fixtures (number) can be increased. As described above, since the force applied to the bracing acts along the bracing, the longitudinal component is large.

  Then, since it can be used so as to oppose the force in the shearing direction applied to the fixing part of the column material, the fixture that has been conventionally used to fix the horizontal member and counters the force in the tensile direction can be used as a whole. The rigidity and proof stress can be improved. For example, a nail or a screw can be used as the fixture. These are all weak against a force in the tensile direction (drawing direction) and strong against a force in the shear direction (see FIG. 14). In addition, the arrow in FIG. 14 shows the direction of force.

  In addition, as the first and second high-rigidity members, for example, steel plates, metal plates, synthetic resin plates such as FRP, and the like can be used. As the damping material, for example, high damping rubber, polyurethane rubber, butyl rubber, or the like can be used. For fixing the first and second high-rigidity members and the damping material, for example, vulcanization adhesion or adhesion using an adhesive can be used.

Here, the high damping rubber means that the equivalent damping constant heq is 5 to 40% and the shear modulus G is 0.1 to 2.0 N / mm2.
When a high damping rubber is used, it is preferable to use a rubber having an equivalent damping constant heq of 15 to 25% and a shear elastic modulus G of 0.3 to 1.2 N / mm2.

  The raw rubber of the high damping rubber is not particularly specified, but one or more raw rubbers selected from natural rubber and synthetic rubbers such as IR, SBR, BR, EPDM, NBR, and IIR can be used. . Further, rubber chemicals (rubber reinforcing materials) generally used such as coumarone resin and carbon black may be added as necessary.

  As described above, since the damping material does not use a special raw material as the rubber composition, it can be manufactured at a low cost.

  In the joint damper according to claim 2, the facing portion is formed larger than the first high-rigidity member, and the facing portion is fixed to the first high-rigidity member via the damping material, You may arrange | position so that a clearance may be formed between the periphery of an opposing part and the periphery of said 1st highly rigid member and said damping material.

  According to this configuration, when installed in the joint portion, a clearance is formed between the peripheral edge of the second high-rigidity member and the first high-rigidity member and the damping material. Shear deformation can be performed in any direction of bracing compression and tension. Therefore, it is possible to efficiently absorb energy due to shaking such as an earthquake, suppress deformation of the building, and stop shaking earlier.

  In the joint damper according to a third aspect of the present invention, it is preferable that the side portion is orthogonal to the facing portion and protrudes in a direction opposite to the first high-rigidity member side.

  According to this structure, since the side of the column material is perpendicular to the side of the column in the joint portion of a normal wooden building, it can be installed without being limited to the joint portion of a general wooden building. Note that “the side portion is orthogonal to the facing portion” means a substantially L-shaped section formed by bending a steel plate or the like, for example.

  The joint damper according to claim 4 is provided with a plurality of mounting holes penetrating in the stacking direction in the first high-rigidity member, and the through holes correspond to the mounting holes in the damping material and the facing portion. It is arranged at a position, and a plurality of mounting holes are provided in the side portion.

  According to this configuration, the plurality of mounting holes that penetrate the first high-rigidity member in the stacking direction are provided, and the second high-rigidity member and the damping material have through-holes at positions corresponding to the mounting holes. Since it is provided, the first high-rigidity member can be easily fixed to the brace through the attachment hole from the second high-rigidity member side through the through hole.

  Moreover, the attachment hole to be used can be selected according to the various installation angles of the bracing by providing the plurality of attachment holes of the first high-rigidity member in a scattered manner.

  Normally, the bracing installation angle (the angle between the brace and the column material) is within 45 degrees, and it is only necessary to be able to cope with it. Therefore, either one of the left and right lower portions of the first high-rigidity member has a mounting hole. Need not be provided. If the mounting holes are reduced in this way, the rigidity of the first high-rigidity member itself can be increased. The same applies to the through holes provided in the second high-rigidity member and the damping material.

  On the other hand, since a plurality of mounting holes are provided in the side portion of the second high-rigidity member, the second high-rigidity member can be easily fixed to the side surface of the column member using a fixing tool such as a screw. Also, the number of mounting holes is specified by the Building Standards Act, and it should be more than the number corresponding to the number of fixtures that can be used to fix the joint damper and the column and horizontal members at the joint. That's fine.

  For example, when it is defined as 8 in the Building Standard Law, in the case of a conventional joint damper, there are 4 mounting holes for pillars and 4 mounting holes for horizontal members. What is necessary is just to provide 8 or more attachment holes in the said side part. Since there is a balance with the rigidity of the side portion itself, it is not preferable to provide too many mounting holes.

  The joint damper according to claim 5 is not fixed to the horizontal member and the brace in a state where the joint damper according to any one of claims 1 to 4 is disposed in the joint portion. It is characterized by that.

  According to this configuration, a structure in which the horizontal member and the brace are usually fixed with screws, bolts, or the like is generally used, but by using the joint damper according to the present invention, it is installed without fixing them. be able to. Thereby, compared with the structure where the normal horizontal member and the brace were fixed, the damping property of a joint damper can be used and the shaking of a building can be suppressed effectively.

  In addition, since the joint damper of the present invention is used for a wooden frame structure, if the horizontal member and the brace are fixed with screws or bolts, a load is applied to the fixed part due to expansion or contraction of the wood due to temperature change or humidity change. It takes. Furthermore, when such a load is applied, stress concentrates around the screw or bolt, which may cause damage to the wood. Therefore, by adopting a structure that does not fix the horizontal member to the brace, it can flexibly respond to the expansion and contraction of the wood, and since there is no need for screws or bolts, there is no stress concentration around the screws and bolts, and the fixed part Such an extra load can be suppressed. As a result, it will lead to longer life of wood.

  In the joint damper according to a sixth aspect, a gap may be provided between the horizontal member and the brace in a state where the joint damper is disposed in the joint portion.

  In the joint damper according to a seventh aspect, the horizontal member and the brace may be in contact with each other in a state where the joint damper is disposed in the joint portion.

  According to these configurations, if a structure is provided in which a gap is positively provided between the horizontal member and the brace, the damping of the joint damper can be made more effective. If it is set as the structure contact | abutted, it can also be set as the structure which raised the rigidity of the joint part with respect to the force to the compression direction of bracing rather than the case where a clearance gap is provided. In addition, a structure may be adopted in which a gap is provided between the upper horizontal member (beam) and the brace and the lower horizontal member (base) and the brace are in contact with each other. It has a configuration with increased rigidity at the bottom.

  According to the structure of the joint portion according to claim 8, in the joint portion of the wooden frame structure having the horizontal member, the column member, and the brace, the first high-rigidity member is fixed to the end portion of the brace. The second high-rigidity member having a facing portion facing the first high-rigidity member via a damping material having viscoelasticity and one side portion orthogonal to the facing portion is the first high-rigidity member. It is fixed integrally with the member, and the side portion is fixed only to the side surface of the column member.

  According to this configuration, as in the case where the joint damper according to claim 1 is provided in the joint portion, the energy of the vibration received by the building from an earthquake or strong wind is absorbed by the shear deformation of the damping material, and the building Deformation can be suppressed and shaking can be stopped early.

  In addition, since the second high-rigidity member is structured to be fixed by a fixture between the side surface of the column member and the horizontal surface of the horizontal member, the joint portion where the horizontal member intersects is provided. Even can be applied. Moreover, according to the structure of this joint part, when constructing exterior materials, such as an outer wall and a structural plywood, interference with said 2nd highly rigid member can be avoided.

  Furthermore, compared with the conventional joint damper, since it has high rigidity and proof strength with respect to the force which acts on bracing, the damping effect is higher.

  In addition, the structure of this joint damper can also be made into the structure which exhibits a damper effect only in the said pulling direction of a bracing, or can be made into the structure which exhibits a damper effect in both a tension direction and a compression direction, for example.

  According to the structure of the joint portion according to claim 9, a structure is formed in which a gap is formed between the side surface of the pillar material, the end portion of the brace, the first high-rigidity member, and the damping material. It is desirable to do.

  According to this configuration, as in the case where the joint damper according to claim 2 is provided in the joint portion, the damping material can be shear-deformed in both the compression and tension directions of the bracing, It can efficiently absorb the energy generated by shaking such as suppressing the deformation of the building and stopping the shaking earlier.

  The structure of the joint part according to claim 10 is characterized in that the horizontal member and the brace are not fixed.

  In the structure of the joint portion according to an eleventh aspect, a gap may be provided between the horizontal member and the brace.

  In the structure of the joint portion according to claim 12, the horizontal member and the brace may be in contact with each other.

  According to the structure of the joint damper and the joint part according to the present invention, the shaking of the building can be stopped slowly and quickly, so that the collapse of the building can be effectively prevented. Moreover, because it can be installed regardless of the structure of the joint, it can be installed regardless of whether it is a new construction, the joint can be easily reinforced, and it interferes with exterior materials such as outer walls and structural plywood. This makes it easier to construct the outer wall. Furthermore, if a structure that does not restrain the shear deformation of the damping material is used, it is possible to absorb the energy of shaking more efficiently and to construct a wooden building that is resistant to a large earthquake or the like.

In addition, since the joint damper of the present invention has a structure that is not fixed to the horizontal member but is fixed only to the side of the column member, it has been used to fix the horizontal member in the past (number) Can be used for fixing to the side surface of the column member, so that the proof stress is improved against the force in the pulling direction that mainly acts on the bracing, the rigidity is increased, and the damping effect can be enhanced.

(A) is a front view of the joint damper concerning this invention, (b) is the left side view, (c) is the bottom view. It is the perspective view which installed the joint damper of this invention in the wooden frame. It is the elements on larger scale of the joint part (A) in FIG. It is the perspective view which looked at FIG. 3 from the reverse direction. 2A is a cross-sectional view in the X direction in FIG. 2, and FIG. 3B is an explanatory diagram in the case where the bracing angle is different. It is a perspective view of the joint part which installed the joint damper of this invention in the wooden frame where a pillar material and a beam cross | intersect. It is a perspective view which shows another Example of the structure of the joint part concerning this invention. It is the perspective view which installed the joint damper of this invention in the load-bearing wall which leaned the bracing. (A) is a front view which shows another embodiment of the joint damper concerning this invention, (b) is the left side view, (c) is the bottom view. It is a perspective view of the joint part which installed the joint damper shown in FIG. (A) is a front view of the wooden frame used for the effect test. (B) is a front view which shows the outline | summary of the testing apparatus used for the effect test. (A) is a graph which shows the relationship between top horizontal displacement and load at the time of installing the joint damper of this invention obtained by the effect test. (B) is the same graph at the time of installing the joint damper of the comparative example obtained by the effect test. (A) is the comparison figure which piled up both the graphs of FIG. 12 in top part horizontal displacement -60 mm-60 mm. (B) is the comparison figure which showed the relationship between the true interlayer deformation angle and load when the joint damper of this invention obtained by the effect test and the joint damper of a comparative example are installed. (A) is the front view which showed the direction of the load concerning a bracing, and the direction of the load concerning a fixing tool (wood screw) in the joint part which installed the joint damper of this invention. (B) is the same front view at the time of installing the joint damper of a comparative example. (A) is a front view of the joint damper of a comparative example. (B) is the perspective view which installed the joint damper of the comparative example in the joint part of a wooden frame. It is the perspective view which installed the joint damper of this invention in the wooden frame (installation method 3). It is the elements on larger scale of the joint part (B) in FIG. It is the perspective view which looked at FIG. 17 from the reverse direction. It is a graph showing the relationship between the top horizontal displacement and the load when the joint damper of the present invention obtained by the vibration damping effect test is installed, and when a gap is provided between the brace and the horizontal member and column member FIG. 6 is a comparison diagram between (Installation Method 1) and a case where the contact is made without providing a gap (Installation Method 3).

  Embodiments of the structure of the joint damper and joint part according to the present invention will be described with reference to FIGS.

[Composition of joint damper]
FIG. 1 is a diagram showing the configuration of a joint damper according to the present invention. In FIG. 1, the joint damper 1 sandwiches a plate-like damping material 4 made of high-damping rubber having viscoelasticity between a first high-rigidity member 2 made of a steel plate and a second high-rigidity member 3. , Fixed integrally by vulcanization adhesion.

The first high-rigidity member 2 is formed in a substantially square shape having chamfered corners. The second high-rigidity member 3 has a substantially square-shaped facing portion 3a that is slightly larger than the first high-rigidity member 2, and has an end bent to an L-shape at one edge of the four sides of the facing portion 3a. It is formed by the side part 3b. Eight mounting holes 3c are provided in the side portion 3b, and are arranged in a substantially M shape at a predetermined interval. On the other hand, the damping material 4 is formed in a substantially square shape that is slightly smaller than the first high-rigidity member 2.

  Then, the first high-rigidity member 2, the damping material 4, and the opposing portion 3 a of the second high-rigidity member 3 are sequentially laminated with their centers aligned, and are fixed together by vulcanization adhesion. Yes. When integrated, the first high-rigidity member 2 and the damping member 4 are opposed to the second high-rigidity member 3 as opposed to the second high-rigidity member 3 when viewed from the stacking direction (front direction). It is fixed so that a clearance is formed between the peripheral edge of 3a and the first high-rigidity member 2 and the damping material 4.

  The joint damper 1 configured in this manner is provided with a plurality of mounting holes 1z penetrating in the thickness direction. These mounting holes 1z are a plurality of through-holes 3z, 4z provided in the mounting hole 2z provided in the first high-rigidity member 2, and the facing portion 3a of the second high-rigidity member 3 and the damping material 4, respectively. The through holes 3z and 4z of the second high-rigidity member 3 and the damping material 4 are attached to the first high-rigidity member 2. The diameter is slightly larger than the hole 2z, and the mounting hole 2z is provided with a counterbore for screwing (see FIG. 5 (a)).

  The mounting holes 1z are provided at predetermined intervals in a substantially triangular shape in the order of five, three, and one from the side portion 3b side, for example, so as to correspond to various installation angles of bracing. ing. By arranging the mounting holes 1z in this way, the mounting holes 1z can be appropriately selected according to the installation angle of the braces (see FIG. 5 (b)).

[Installation method 1 of joint damper]
Next, an installation method for installing the joint damper 1 in the wooden frame joint will be described.
FIG. 2 is a perspective view of a wooden frame F (one-line crossed shaft) serving as a load-bearing wall of a wooden building, FIG. 3 is a partially enlarged view of the joint portion 10 indicated by A in FIG. 2, and FIG. It is the perspective view which looked at the opening | mouth part 10 from the reverse direction to FIG. 3, and FIG. 5 (a) is X direction sectional drawing in FIG. Reference numeral 11 denotes a pillar material, reference numeral 12 denotes a base, reference numeral 13 denotes a brace, and reference numeral 14 denotes a foundation.

  The brace 13 is shortened by cutting both ends so that a gap C <b> 1 is formed between the pillar material 11 and the base 12. In the lower joint portion 10, the first high-rigidity member 2 is brought into contact with the lower end portion of the brace 13, and the side portion 3 b of the second high-rigidity member 3 is brought into contact with the side surface 11 a of the column member 11. Arrange in the state of letting. Then, the wood screw 5 is screwed into the mounting hole 3y of the side portion 3b, the side portion 3b is fixed to the pillar 11, and the mounting hole 1z penetrating in the thickness direction of the joint damper 1 faces the brace 13. The wood screw 5 is screwed into the mounting hole 1z from the second high-rigidity member 3 side, and the first high-rigidity member 2 is fixed to the bracing 13.

  If the joint damper 1 is installed in the joint portion 10 in this manner, a gap C1 is formed between the lower end of the brace 13 and the side surface 11a of the column member 11 and the upper surface 12a of the base 12, The brace 13, the column material 11, and the base 12 are connected via the joint damper 1. Similarly, in the upper joint portion, the joint damper 1 is installed at the upper end of the brace 13.

[Effects of installing a joint damper]
When this wooden building is shaken by an earthquake or the like and a horizontal (horizontal) vibration (force) is generated in the wooden frame F, the compressive and tensile forces are applied to the braces 13 along with the deformation of the wooden frame F. Acts alternately. Then, the damping material 4 of the joint damper 1 fixed to the brace 13 is subjected to shear deformation in accordance with the force acting in the compression direction or the pulling direction of the brace 13, thereby efficiently using energy such as earthquake applied to the wooden frame F. Absorb well and suppress shaking. Thus, by effectively suppressing the shaking of the building, the shaking can be stopped at an early stage, so that the building can be prevented from being collapsed.

  Furthermore, since the joint damper 1 is installed inside the wooden frame F, the joint damper 1 can be installed in the joint part 10 where the base 12 intersects, and the installation location is not limited. That is, it is possible to improve the vibration damping performance by installing the joint damper 1 in each brace 13 for the wooden frame F provided with the brace 13 as a rack, and the number of joint dampers 1 installed. This makes it easy to adjust the rigidity and attenuation of the building.

  Thus, since the joint damper 1 is installed inside the wooden frame F, the exterior material can be easily constructed without interfering with the exterior material such as the outer wall or the structural plywood.

[Damping effect test when the joint damper of the present invention and the joint damper of the comparative example are installed]
Here, a test apparatus was used to test the vibration damping effects when the joint damper 1 of the present invention was installed and when the joint damper 101 (see FIG. 15) of the comparative example was installed. Hereinafter, details of the test apparatus and test results will be described with reference to FIGS.

As shown in FIG. 11, the test apparatus uses a wooden frame in which a base 112 (Sill), a beam (Beam) 115, a pillar (Post) 111 × 2, and a brace 113 is diagonally arranged, and the bracing 113 Install joint dampers at both ends. Then, the base 112 is fixed, and a liner guide 116 is attached to the beam 115 so as to be slidable in the lateral direction. The oil jack 117 is pistoned from the right side of the beam 115 to apply a lateral load alternately between the compression direction and the tension direction. Then, this load is gradually increased.

  In addition, the pillar material 111 and the base 112 are 105 mm × 105 mm square material using Japanese cedar, the beam 115 is 180 mm × 105 mm square material using rice pine, and the bracing 113 is 90 mm × 45 mm square material using Canadian Tsuga. A wooden frame with a width of 2730 mm and a width of 910 mm was used. In this test, the column member 111 and the bracing 113 are brought into contact with each other, a clearance of 20 mm is provided at each end of the base 112 (beam 115) and the bracing 113, and the joint damper 1 (101) is provided at both ends of the bracing 113. Install in the department.

On the other hand, for the joint damper 1 (101) used in the test, a steel plate having a thickness of 5 mm is used for the first high-rigidity member 2 (102) and the second high-rigidity member 3 (103), and the damping material 4 (104 ) Was used a high-damping rubber with a thickness of 5 mm (rigidity G = 0.8 N / mm2 / equivalent damping constant Heq = 22.9% / shear strain failure rate Eb = 600% over). In both dimensions of the joint damper 1 (101), the facing portion 3a (103a) is 120 mm × 120 mm, and the side portions 3b (fixed portions 103b and 103b ′) are 120 mm × 35 mm. Wood screws (φ = 5mm / L = 45mm) were used as fixtures for the joint damper and wood.

  Note that the joint damper 101 of the comparative example is a joint damper that is fixed at three positions where the pillar material and the horizontal member (base or beam) are in close contact with each other, and is fixed to the pillar material 111 with four bases 112 (beams). 115) and four wood screws were used for fixing to the brace 113.

  On the other hand, the joint damper 1 of the present invention uses eight wood screws for fixing to the column member 111 and six wood screws for fixing to the brace 113. In any joint damper, a total of 14 wood screws were used for each joint damper.

With this test equipment, the relationship between the lateral load (load: kN) and the lateral displacement of the beam (top horizontal displacement: mm), and the lateral load (load: kN) and angular displacement (true interlayer deformation angle: * The effect of the joint damper 1 of the present invention and the joint damper 101 of the comparative example is compared. Here, the angular displacement is a value obtained by dividing the lateral displacement of the beam by the height of the column (the lateral displacement of the beam is very small compared to the height of the column, so tan ((the lateral displacement of the beam ) / (Column height)) can be approximated by angular displacement.)

[Results of vibration suppression test]
The following results were obtained by the above test. 12A is a graph showing the relationship between the load and the top horizontal displacement when the joint damper 1 of the present invention is installed, and FIG. 12B is the same graph when the conventional joint damper 101 is installed. It is. FIG. 13A is a comparative view in which the above two graphs are overlapped when the top horizontal displacement is about −60 mm to 60 mm. FIG. 13B is a comparative diagram showing the relationship between the load and the true interlayer deformation angle, comparing the case where the joint damper 1 of the present invention is installed and the case where the joint damper 101 of the comparative example is installed. .

  1. From FIG. 12 and FIG. 13 (a), when a load of 1 kN is applied, the top of the comparative damper is displaced about 1.7 times compared to the case where the joint damper of the present invention is installed. I understand that.

  2. From FIG. 13B, it can be seen that when a load of 2 kN is applied, the joint damper of the comparative example has an angular displacement of about twice as much as when the joint damper of the present invention is installed.

  As described above, when the joint damper of the present invention is installed when the same load is applied, the effect of suppressing the deformation amount of the wooden frame is greater than when the joint damper of the comparative example is installed. That is, it has been found that the joint damper of the present invention can absorb a larger force and suppress shaking, and has a very high vibration damping effect as compared with the joint damper of the comparative example.

[How to install a joint damper 2]
Next, the case where it installs in the wooden frame of the structure different from the said installation method 1 is demonstrated. The installation method 1 is an example in which the joint damper 1 is installed in the joint portion 10 where the pillar material 11 and the base 12 intersect. As shown in FIG. 6, the pillar material 11 and the beam 15 intersect. It is also possible to install in the joint part 15 to be performed. Note that the same reference numerals in FIG. 6 denote the same or corresponding components as those in FIG. 2, and a description thereof will be omitted to avoid duplication. The same applies to the reference numerals in FIGS.

  As shown in FIG. 7, the bracing damper 1 can also be attached by arranging the bracing 13 so that the end abuts against the side surface 11 a of the column member 11. If the joint portion 10 has such a structure, when the wooden frame F receives a force from the lateral direction and a compressive force acts on the brace 13, the brace 13 becomes a compression material and stretches, thereby causing a lateral force. Resist. On the other hand, when a tensile force acts on the brace 13, the damping material 4 of the joint damper 1 shears and deforms in the pulling direction of the brace 13, thereby absorbing the energy of the acting force and suppressing the swing of the wooden frame F. Can do.

[Installation method 3 of joint damper]
Further, a case where the installation method is different from the installation methods 1 and 2 will be described. The installation methods 1 and 2 are examples in which the joint damper 1 is attached by providing a gap C1 between the both ends of the brace 13 and the base 12 and the beam 15, but the installation shown in FIGS. Method 3 is an example in which the joint damper 1 is attached so that both ends of the brace 13 abut the base 12 and the beam 15.

  As shown in FIGS. 17 and 18 in which the joint B is enlarged, the end of the brace 13 is in contact with the upper surface 12a of the base (horizontal member) 12 and the lower surface 15a of the beam (horizontal member) 15. Then, the joint damper 1 is attached. If the joint portion 10 ′ has such a structure, even when the wooden frame F receives a force from the vertical direction and a compressive force acts on the brace 13, the brace 13 becomes a compression material and stretches, so that Resist the force. On the other hand, when a tensile force acts on the brace 13, the damping material 4 of the joint damper 1 shears and deforms in the pulling direction of the brace 13, thereby absorbing the energy of the acting force and suppressing the swing of the wooden frame F. Can do. Thereby, it can comprise in a rigid wooden frame. Moreover, in this installation method 3, since the end part of the brace 13 and the side surface 11a of the column member 11 are also brought into contact with each other, the resistance force is high against the compressive force from the lateral direction. Note that the brace 13, the base 12, the beam 15, and the column member 11 are not fixed.

  Further, in order to confirm the vibration damping effect in this case, a vibration damping test was performed using the test apparatus shown in FIG. The result is shown in FIG. FIG. 19 shows the vibration damping effect in the installation method 1 in which the gap C1 is provided between the brace 13 and the base 12, the beam 15, and the column member 11, and in the installation method 3 in which the gap C1 is not provided. It is the graph which compared the test result. From FIG. 19, it can be seen that when there is no gap, the top horizontal displacement at the same load is smaller than when there is a gap. Therefore, it was confirmed that the rigidity increases if there is no gap.

[Installation method 4 of joint damper]
The structure of the joint damper 1 shown in FIG. 7 can also be adopted for a load bearing wall overlaid with braces 13 ′ and 13 ″ as shown in FIG. 8, and can have excellent vibration damping performance. .

  That is, when a force from the right direction is applied to the wooden frame F, a compressive force is generated in one brace 13 'and a tensile force is generated in the other brace 13 ". Then, the brace 13' acts as a compression material. On the other hand, the tensile force generated in the bracing 13 ″ is alleviated by the shear deformation of the damping material 4 of the joint damper 1 installed at both ends thereof.

  On the contrary, when a force is applied to the wooden frame F from the left direction, the brace 13 "acts as a compression material, and stretches and resists the force. On the other hand, the tensile force generated on the brace 13 ' Are alleviated by the shear deformation of the damping material 4 of the joint damper 1 installed in each.

  In this way, one of the braces 13 ′ and 13 ″ is stretched and resisted against the external force, and at the same time, the other can absorb the energy of the external force by the shear deformation of the damping member 4, so that the shaking can be efficiently performed. It can decay and stop early.

  In the structure of the joint portion 10 shown in FIG. 7, the joint damper 1 'shown in FIG. 9 may be employed. FIG. 9A shows a front view of the joint damper 1 ′, FIG. 9B shows the same side view, and FIG. 9C shows the same bottom view. Further, FIG. 10 is a perspective view of the joint portion 10 in which the joint damper 1 ′ is installed. In addition, the same code | symbol is attached | subjected and represented to the same thing as the joint damper 1 of FIG.

  The joint damper 1 ′ has the same configuration as the joint damper 1 except that the first high-rigidity member 2 ′ and the damping material 4 ′ are approximately the same size as the second high-rigidity member 3. Yes. Then, as with the joint damper 1, as shown in FIG. 10, the second high-rigidity member 3 is fixed to the side surface 11a of the column member 11, and the first high-rigidity member 2 ′ is fixed to the end of the brace 13. To do.

  In the above-described first and second embodiments, the example in which the joint damper 1 or 1 'is installed at both ends of the brace 13 is shown, but it is possible to provide only one or the other. It is also possible to install and use conventional metal fittings.

  Further, since the joint dampers 1 and 1 ′ can be installed if there is a brace 13 with the column member 11, a structure without the base 12 and the beam 15 (for example, the column member 11 seems to be directly hit against the ground. Can also be applied.

DESCRIPTION OF SYMBOLS 1 Joint damper 1z Attachment hole 2 1st highly rigid member 2z Attachment hole 3 2nd highly rigid member 3a Opposing part 3b Side part 3y Attachment hole 3z Through hole 4 Attenuating material 4z Through hole 5 Wood screw 10 Joint part 11 Column material 11a Side (column material)
12 Foundation 12a Upper surface (Base)
13 Bracing 14 Foundation 15 Beam 15a Bottom (beam)
C1 Clearance F Wooden frame

Claims (12)

A joint damper used in a joint part of a wooden frame structure having a horizontal member, a pillar member and a brace,
A first high-rigidity member fixed to the braces by a fixture;
A damping material having viscoelasticity;
Comprising one side part fixed to a side surface of the column member by a fixture and a second high-rigidity member having a facing part facing the first high-rigidity member via the damping material;
A joint damper in which these are laminated and fixed together. The opposing portion is formed larger than the first high-rigidity member, and the opposing portion is fixed to the first high-rigidity member via the damping material;
The joint damper according to claim 1, wherein a clearance is formed between the periphery of the facing portion and the periphery of the first high-rigidity member and the damping material.   The joint damper according to claim 1, wherein the side portion is provided so as to be orthogonal to the facing portion and project in a direction opposite to the first high-rigidity member side. The first high-rigidity member is provided with a plurality of mounting holes penetrating in the stacking direction,
In the damping material and the facing portion, a through hole is arranged at a position corresponding to the mounting hole,
The joint damper according to any one of claims 1 to 3, wherein a plurality of mounting holes are provided in the side portion.   The joint damper according to claim 1, wherein the horizontal member and the brace are not fixed in a state in which the joint damper according to claim 1 is arranged in the joint portion.   The joint damper according to claim 5, wherein a gap is provided between the horizontal member and the brace in a state where the joint damper is disposed in the joint portion.   The joint damper according to claim 5, wherein the horizontal member and the brace are in contact with each other in a state where the joint damper is disposed in the joint portion. In the joint part of the wooden frame structure that has horizontal members and pillars and braces,
A first high-rigidity member is fixed to the end of the brace,
A second high-rigidity member having a facing portion facing the first high-rigidity member via a damping material having viscoelasticity and one side portion orthogonal to the facing portion is the first high-rigidity member. Are fixed together with
The structure of the joint part by which the said side part is being fixed only to the side surface of the said column material.   The structure of the joint part according to claim 8, wherein a gap is formed between a side surface of the column member, an end portion of the brace, the first high-rigidity member, and the damping material.   The structure of the joint part according to claim 8 or 9, wherein the horizontal member and the brace are not fixed.   The structure of the joint part according to claim 10, wherein a gap is provided between the horizontal member and the brace.   The structure of the joint part according to claim 10, wherein the horizontal member and the brace are in contact with each other.