JPH0557111U - Anti-vibration bracing member - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a brace member for vibration damping having excellent vibration damping property, durability and temperature resistance. [Structure] Large section side members 2 are provided at both ends of the small section intermediate member 1.
One end of each of the two is integrally connected in series to form a steel central axial force member 3, and the steel central axial force member 3 is inserted into a steel hollow buckling restraint member 4 and The compressible member 5 is fixed to the inner end surface of the lateral member 2 in cross section, and the central axial force member 3 made of steel is fixed.
The room temperature curable material 6 is filled between the compressible member 5 and the steel hollow buckling restraint member 4.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a vibration-damping bracing member used as a structural element for resisting horizontal forces such as seismic force and wind force in buildings and other structures.

[0002]

[Prior Art]

 Conventionally, as a bracing member used in a building, as disclosed in (1) Japanese Utility Model Laid-Open No. 63-101603, a buckling restraining concrete member reinforced with steel is used for a steel central axial force. The member is inserted, an anti-adhesive coating is provided between the surface of the central axial force member and the concrete member, and a steel reinforcing rib plate is fixed to the end of the steel central axial force member. A buckling restraint bracing member in which an elastic material for absorbing deformation that comes into contact with the end face of the reinforcing rib plate on the center side of the central axial force member is provided in the concrete member, (2) main bracing member and sub-bracing member Brace members and the like in which a viscoelastic material is interposed between and are known.

[0003]

[Problems to be solved by the device]

 Since the steel central axial force member inserted into the buckling restraint concrete member in the buckling restraint bracing member of the above (1) has the same cross-section member over almost the entire length, the steel central axial force member over almost the entire length. At the same time, the state of yielding is entered, so that the amount of axial deformation of the steel central axial member at the time of yielding is significantly increased, and the damping capacity of the building is reduced. Further, in the case of the bracing member of the above (2), problems tend to occur in quality control, durability, temperature resistance, etc. of the viscoelastic material.

[0004]

[Means for Solving the Problems]

 In order to advantageously solve the above-mentioned problems, in the invention of claim 1, one end of the large-section side member 2 is integrally connected to both ends of the small-section intermediate member 1 in series to form a steel middle member. The core axial force member 3 is configured, the steel central axial force member 3 is fitted and inserted into the steel hollow buckling restraint member 4, and the compressible member 5 is attached to the inner end surface of each large cross-section lateral member 2. After fixing, the room temperature hardenable material 6 is filled between the steel central axial force member 3 and the compressible member 5 and the steel hollow buckling restraint member 4. Further, in the invention of claim 2, in order to prevent the steel central axial force member 3 from adhering to the room temperature curable material 6, the steel central axial force member 3 and the room temperature curable material 6 are provided between the steel central axial force member 3 and the room temperature curable material 6. The anti-adhesion layer 7 is interposed.

[0005]

【Example】

 5 to 7 show a steel central axial force member 3 used in an embodiment of the present invention, in which both ends of a small cross-section steel intermediate member 1 having a cross-shaped cross section are made of steel having a cross-shaped cross section. The steel-made large-section side members 2 are integrally connected in series to form a steel central axial force member 3, and a plurality of bolts are provided on each plate body at both ends of the steel central axial force member 3. A through hole 8 for insertion is provided.

1 to 4 show a vibration-damping bracing member according to an embodiment of the present invention, which uses the steel central axial force member 3 in FIGS. A compressible member 5 made of Styrofoam is fixed to the inner end surface of each lateral member 2 having a large cross section in the force member 3 with an adhesive, and the exposed surface of the steel central axial force member 3 excluding both ends is shown. On the surface, an adhesion preventing layer 7 made of rubber asphalt is integrally provided, and the compressible member 5 and the portion of the steel central axial force member 3 provided with the adhesion preventing layer 7 excluding both ends are made of a square steel pipe. And a steel central axial force member 3 arranged in the center of the steel hollow buckling restraint member 4 and provided with the compressible member 5 and the adhesion preventing layer 7, and the steel hollow buckling restraint member 4 Room temperature curable material 6 consisting of mortar or concrete is filled between Has been done.

FIGS. 8 to 10 show a state in which the connecting members 9 are attached to both ends of the vibration-damping bracing member according to the embodiment of the present invention, in which a large number of bolt insertion through holes 10 are provided. A connecting plate 12 having a cross-shaped cross section is fixed to the connecting seat plate 11 by welding, and each plate body at the end of the steel central axial force member 3 protruding from both ends of the steel hollow buckling restraint member 4 A steel joint plate 13 is brought into contact with each of the connecting plates 12 of the connecting fitting 9, and is joined by a large number of bolts 14.

In carrying out the present invention, the small cross section intermediate member 1 of the steel central axial force member 3 may be made of low yield point steel, and the large cross section side member 2 may be made of high tensile steel. Yes. With this structure, the low yield point steel acts as a damping material when the strain is small, but the residual deformation can be reduced because the high tensile steel is in the elastic range.

As the axial force acting on the vibration-damping bracing member increases due to the wind pressure or the seismic force acting on the building, the stress level of the small-section intermediate member 1 becomes higher. Surrender begins. However, as compared with the case where the steel central axial force member 3 has a small cross-sectional area over the entire length, the amount of strain of the entire steel central axial force member until reaching the yield point is small. Therefore, the yield point can be reached with a smaller amount of strain than in the case where the steel central axial force member 3 has a cross-sectional area over the entire length. After the small cross section intermediate member 1 of the steel central axial force member 3 reaches the yield point, the hysteresis damping effect of energy absorption of the small cross section intermediate member 1 is utilized to effectively suppress the vibration of the building. be able to.

[0010]

[Effect of the device]

 According to the present invention, one end of a large cross-section lateral member 2 is integrally connected in series to both ends of a small cross-section intermediate member 1 to form a steel central axial force member 3, and the steel central shaft member The force member 3 is fitted into the steel hollow buckling restraint member 4, and the compressible member 5 is fixed to the inner end surface of each large cross-section lateral member 2, and the steel central axial force member 3 and the compressible member 3 are contracted. Since the room-temperature curable material 6 is filled between the elastic member 5 and the steel hollow buckling restraint member 4, it is possible to easily obtain a vibration-damping bracing member having excellent vibration damping property, durability, and temperature resistance. In addition, since the room temperature buckling restraint member 4 made of steel is filled with the room temperature curable material 6, it is necessary to increase the rigidity of the vibration damping bracing member and significantly increase its buckling strength. In addition, compared with the case where the steel central axial force member 3 has a small cross-sectional area over its entire length, the steel central axial force member 3 is It is possible to reduce the strain of the entire steel center axis force member to reach the Fushimi point. When an axial compressive force acts on the steel central axial force member 3, the compressible member 5 is compressed by the inner end portion of the large-section lateral member 2 of the steel central axial force member 3. The small intermediate member 1 can be easily yield-deformed. Furthermore, by interposing the adhesion preventive layer 7 between the steel central axial force member 3 and the room temperature curable material 6, the adhesive bonding between the room temperature curable material 6 and the steel central axial force member 3 is prevented. Therefore, the damping property can be surely exhibited.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a vibration-damping bracing member according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged sectional view taken along line BB of FIG.

FIG. 4 is an enlarged sectional view taken along line CC of FIG.

FIG. 5 is a side view showing a steel central axial force member used in an embodiment of the present invention.

6 is an enlarged cross-sectional view taken along the line DD of FIG.

7 is an enlarged cross-sectional view taken along the line EE of FIG.

FIG. 8 is a side view showing a state in which connecting fittings are attached to both ends of the vibration-damping bracing member according to the embodiment of the present invention.

FIG. 9 is a side view showing a part of FIG. 8 in an enlarged manner.

10 is a sectional view taken along line FF of FIG.

[Explanation of symbols]

 1 Small Section Intermediate Member 2 Large Section Side Member 3 Steel Central Axial Force Member 4 Steel Hollow Buckling Restraint Member 5 Compressible Member 6 Room Temperature Curable Material 7 Adhesion Prevention Layer 8 Bolt Insertion Through Hole 9 Connecting Metal Fitting 10 Through hole for bolt insertion 11 Connection seat plate 12 Connection plate 13 Joint plate 14 Bolt

Claims (2)

[Scope of utility model registration request] 1. A steel central axial force member 3 is constructed by integrally connecting one end of a large sectional side member 2 to both ends of a small sectional intermediate member 1 in series so as to form a steel central axial force. The member 3 is inserted into the hollow buckling restraint member 4 made of steel, and the compressible member 5 is fixed to the inner end surface of each of the large cross-section lateral members 2, and the steel central axial force member 3 and the compressible member A vibration-damping bracing member in which a room temperature curable material 6 is filled between the member 5 and the steel hollow buckling restraint member 4. 2. A steel central axial force member 3 and a room temperature hardening material 6
The anti-vibration bracing member according to claim 1, wherein an adhesion prevention layer 7 is interposed between the anti-vibration bracing member and the anti-vibration bracing member.