JP2007332570A - Bearing wall frame - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing wall frame, resisting against both pulling and compression when horizontal force due to an earthquake is applied thereto, having excellent vibration control effect, also supporting the vertical load, having no positional restrictions on the arrangement position between posts, and exhibiting vibration control effect. <P>SOLUTION: Diagonal members 2 are constructed in a rectangular frame 1 to constitute the bearing wall frame 3. A vertical frame 4 of the rectangular frame 1 is constructed by a structural material disposed between upper and lower beams 5 or between a beam 5 and a bed 6 to support the vertical load of a building. The diagonal member 2 is constructed by an unbond brace 9 comprising a brace body 7 with both ends constructed and fitted to the rectangular frame 1, and a constraining member 8 allowing the axial displacement of the brace body 7 while constraining the deformation in the out-of-plane direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a load-bearing wall frame used as a load-bearing wall of a building.

  Conventionally, Patent Document 1 is known as a load-bearing wall frame that can improve the deformability (stickiness) of the entire load-bearing wall frame.

  In the load bearing wall frame shown in Patent Document 1, a diagonal member is installed in a horizontal V shape between vertical frames of a rectangular frame, and a portion connected to a vertical frame of upper and lower diagonal members arranged in a horizontal V shape. Among them, at the part connecting the lower end of the upper diagonal and the upper end of the lower diagonal, the intersection of the neutral axis of the vertical frame and the neutral axis of the upper diagonal, the neutral axis of the vertical frame and the lower diagonal If the load is applied to the load-bearing wall frame in the event of an earthquake, the vertical frame 2 above will be used. The part between the two intersections is plastically deformed by bending stress to improve the deformation capacity (stickiness) of the entire load-bearing wall frame, and has a tough structure that easily absorbs earthquake energy. And in the said patent document 1, between the two said intersections of the intermediate part of the up-down direction of a vertical frame so that a plastic deformation can be more reliably performed in the part between the said two intersections of a vertical frame at the time of an earthquake. The part is made thinner than other parts.

The conventional load-bearing wall frame as described above is disposed between the upper and lower beams or between the beam and the base, and plastically deforms at the portion between the two intersections of the vertical frame during an earthquake as described above. In this case, the conventional load-bearing wall frame is designed to absorb seismic energy while improving the sticking force when the horizontal force is repeatedly applied to prevent breakage of the load-bearing wall frame. Because it is necessary to make the structure easy to plastically deform in the event of an earthquake, it is not possible to support a vertical load with a load-bearing wall frame.For this reason, when arranging between upper and lower beams or between a beam and a foundation, There is a restriction on the placement position that it can be placed only next to the column where vertical loads need not be supported, and the load-bearing wall frame is placed between the upper and lower beams or between the beam and the foundation at an intermediate position between the columns. Theft could not be.
JP 2003-113653 A

  The present invention was invented in view of the above-mentioned conventional problems, and can resist both pulling and compression when a horizontal force due to an earthquake or the like is applied, has excellent vibration damping effect, and has a vertical load. It is an object of the present invention to provide a load-bearing wall frame that can support the above and can exhibit a vibration damping effect without any positional restriction of the arrangement position between the columns.

  In order to solve the above problems, the bearing wall frame according to the present invention is a bearing wall frame 3 constructed by laying diagonal members 2 in a rectangular frame 1, and the rectangular frame 1 is between upper and lower beams 5 or beams 5. The brace body 7 is disposed between the base 6 and the base 6 and is constructed of a structural material for supporting the vertical load of the building. 7 is constituted by an unbonded brace 9 including a restraining member 8 for restraining deformation in the out-of-plane direction while allowing axial displacement of 7.

  As described above, the vertical frame 4 of the rectangular frame 1 is arranged between the upper and lower beams 5 or between the beam 5 and the base 6 and is constituted by a structural material for supporting a vertical load. Since the load from the beam 5 can be supported and the diagonal member 2 is an unbonded brace 9, the restraint member 8 prevents buckling of the brace body 7 when a horizontal force such as an earthquake acts, and pulls it. Since it can resist both compression and restrains deformation in the out-of-plane direction while allowing axial deformation during pulling and compression, an excellent vibration damping effect can be obtained by hysteresis absorption energy when restraining deformation. It is what As described above, the bearing wall frame of the present invention is disposed between the upper and lower beams 5 or between the beams 5 and the base 6 and can support a vertical load and has an excellent vibration damping effect in the event of an earthquake. Therefore, the load-bearing wall frame of the present invention has an excellent vibration damping effect in which there is no restriction on the arrangement position between the columns 15 when arranged between the upper and lower beams 5 or between the beam 5 and the base 6 and the degree of freedom of design is obtained. The load-bearing wall frame 3 can be obtained.

  Moreover, it is preferable that two or more unbonded braces 9 are installed in the rectangular frame 1 so that the inclination direction with respect to the vertical is opposite.

  By adopting such a configuration, when a horizontal force is applied due to an earthquake, if one unbonded brace 9 resists a pulling force, the other unbonded brace 9 resists a compressive force. When one of the unbonded braces 9 resists the compressive force, the other unbonded brace 9 resists the pulling force, and both unbonded place 9 repeats this alternately while maintaining the horizontal force during the earthquake. In addition to resisting, both the unbonded braces 9 can exhibit an excellent vibration damping effect due to the hysteresis absorption energy when restraining deformation in the out-of-plane direction while allowing deformation in the axial direction.

  A brace body 7 made of steel strip is slidably inserted into the steel pipe 10 so that both ends protrude from the steel pipe 10 and a wooden spacer 11 is interposed between both surfaces of the brace body 7 and the inner surface of the steel pipe 10. It is preferable to constitute the unbonded brace 9 and to restrain the deformation in the out-of-plane direction while allowing the steel pipe 10 to deform the brace body 7 in the axial direction via the spacer 11.

  With this configuration, the brace body 7 is slidably inserted into the steel pipe 10 and the wooden spacer 11 is interposed between both side surfaces of the brace body 7 and the inner surface of the steel pipe 10. The unbonded brace 9 having an excellent vibration damping effect can be configured.

  In addition, the pair of square steel pipes 12 are juxtaposed with each other through the small gap 13, and both side surfaces orthogonal to the juxtaposition direction of the pair of square steel pipes 12 are fixed with the fixing plates 14, respectively. An unbonded brace 9 is formed by slidably inserting a brace body 7 made of a steel strip into a small gap 13 of the restraining member 8, and out of plane while allowing the restraint member 8 to deform the brace body 7 in the axial direction. It is preferable to constrain directional deformation.

  By setting it as such a structure, the restraint member 8 can be comprised with a simple structure.

  The present invention is capable of resisting both pulling and compression when a horizontal force due to an earthquake or the like is applied, and restraining deformation in an out-of-plane direction while allowing axial deformation during pulling and compression. The vibration absorption effect of this system can provide excellent vibration control effects and can support vertical loads.Therefore, there is no positional restriction between the positions of the columns, so that they can be placed at any position between the columns. It is possible to provide a load-bearing wall frame capable of supporting the vibration and exhibiting the damping effect.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  The load-bearing wall frame 3 of the present invention is disposed between the upper and lower beams 5 or between the beams 5 and the base 6, and is constructed by building a diagonal member 2 on a rectangular frame 1.

  The rectangular frame 1 is constructed by laying an upper horizontal frame 16 and a lower horizontal frame 17 between the upper and lower ends of the left and right vertical frames 4. The vertical frame 4 and the upper horizontal frame 16 constituting the rectangular frame 1, The horizontal frame 17 is made of strong square steel pipe, H steel, or the like. In particular, the vertical frame 4 is a state in which the load-bearing wall frame 3 is disposed between the upper and lower beams 5 or between the beam 5 and the base 6 and attached. It is a structural material that can support the vertical load of the building.

  In the rectangular frame 1, two or more diagonal members 2 having an opposite inclination direction with respect to the vertical direction are installed. In the embodiment shown in FIG. 1, an example is shown in which two diagonal members 2 (upper diagonal member 2 a and lower diagonal member 2 b) are installed in a horizontal V shape between vertical frames 4 of a rectangular frame 1.

  The diagonal member 2 used in the present invention is composed of unbonded braces 9. The unbonded brace 9 includes a brace body 7 and a restraining member 8 for restraining deformation in the out-of-plane direction while allowing axial displacement of the brace body 7.

  FIG. 2 shows an example of an unbonded brace 9 used in the present invention. In FIG. 2, the brace body 7 is made of band steel, and the restraining member 8 is made of a steel pipe 10 and a wooden spacer 11. The brace body 7 that is longer than the steel pipe 10 is used, and both end portions serve as connection portions 7a. The brace body 7 is slidably inserted into the steel pipe 10 so that both ends protrude from the steel pipe 10 and a wooden spacer 11 is interposed between both surfaces of the brace body 7 and the inner surface of the steel pipe 10 to form an unbonded brace 9. It is. Here, the wooden spacer 11 and the steel pipe 10 may be fixed by any fixing means. The spacer 11 and the brace body 7 are non-fixed. In addition, although the example of a square steel pipe is shown as the steel pipe 10 in embodiment of FIG. 2, a cylindrical steel pipe may be sufficient.

  FIG. 3 shows another example of the unbonded brace 9 used in the present invention. In FIG. 3, the brace body 7 is made of steel strip. The restraining member 8 has a pair of square steel pipes 12 juxtaposed with each other through a small gap 13 and both side surfaces orthogonal to the juxtaposition direction of the pair of square steel pipes 12 are fixed with fixing plates 14 respectively. Configured. The brace body 7 is longer than the restraining member 8, and both ends of the brace body 7 serve as connection portions 7a. An unbonded brace 9 is configured by inserting a brace body 7 made of steel strip slidably into the small gap 13 of the restraining member 8 and projecting the connecting portions 7a at both ends.

  The unbonded brace 9 configured as described above is constructed on the rectangular frame 1 by fixing the connecting portions 7a at both ends of the brace body 7 to the rectangular frame 1 by welding or the like. In the embodiment shown in FIG. 1, the connecting portion 7a is fixed to the connecting portion plate 19 fixed to the rectangular frame 1 by welding.

  Thus, the bearing wall frame 3 of the present invention is configured by laying the diagonal member 2 composed of the unbonded brace 9 on the rectangular frame 1 composed of the structural member for supporting the vertical load of the building. is there.

  The load-bearing wall frame 3 is used as a load-bearing wall panel in a frame structure of a ramen structure formed by using columns 15 and beams 5, and the rectangular frame 1 is between the upper and lower beams 5 or between the beams 5 and the base 6. The lower end of the bearing wall frame 3 is connected to the beam 5 or the base 6 and the upper end is connected to the beam 5.

  Here, when a horizontal force is applied to the load bearing wall frame 3 due to an earthquake or the like, since the diagonal member 2 is an unbonded brace 9, the restraining member 8 prevents the brace body 7 from buckling, and both the tension and compression are performed. In addition, the restraining member 8 restrains the deformation in the out-of-plane direction while allowing the deformation of the brace body 7 in the axial direction during the pulling and compression of the brace body 7, so that it is more excellent in the hysteresis absorption energy when restraining the deformation. The vibration control effect will be obtained.

  Here, as shown in FIG. 1, when two or more unbonded braces 9 whose vertical inclination directions are opposite to each other are installed in the rectangular frame 1, one of the unbonded braces 9 is pulled when a horizontal vibration acts due to an earthquake. When resisting force, the other unbonded brace 9 resists compressive force. Conversely, when one unbonded brace 9 resists compressive force, the other unbonded brace 9 pulls. The unbonded place 9 resists the vibration of the earthquake while alternately repeating this, and the unbonded braces 9 constituting the upper diagonal material 2a and the lower diagonal material 2b each allow axial deformation. On the other hand, an excellent vibration damping effect can be exhibited by the hysteresis absorption energy when restraining the deformation in the out-of-plane direction.

  Moreover, the load-bearing wall frame 3 of the present invention not only has an excellent vibration damping effect as described above, but also includes the vertical frame 4 of the rectangular frame 1 made of a structural material that supports the vertical load of the building as described above. Therefore, as shown in FIG. 4, the intermediate portion of the beams 5 is supported by the rectangular frame 1 of the bearing wall frame 3 by being arranged between the upper and lower beams 5 or between the beams 5 and the base 6 in the intermediate portion between the columns 15. The vertical load applied from the middle part of the beam 5 can be supported by the rectangular frame 1. Of course, the load-bearing wall frame 3 having an excellent vibration damping effect can be disposed at a position where the vertical load need not be supported, that is, a position adjacent to the column 15 as shown in FIG. As described above, in the present invention, there is no restriction on the arrangement position of the bearing wall frame 3 having an excellent vibration damping effect between the columns 15, and the degree of freedom in design increases.

It is a perspective view of one embodiment of a bearing wall frame of the present invention. An example of an unbonded brace used for the above is shown, (a) is a front view, (b) is a side view, (c) is a plan view, and (d) is a cross-sectional view. The other example of the unbonded brace used for the above is shown, (a) is a front view, (b) is a side view, (c) is a plan view, and (d) is a cross-sectional view. It is a front view which shows the construction example of a load-bearing wall frame same as the above. It is a front view which shows the other construction example of a load-bearing wall frame same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rectangular frame 2 Diagonal material 3 Bearing wall frame 4 Vertical frame 5 Beam 6 Base 7 Brace body 8 Restraint member 9 Unbonded brace 10 Steel pipe 11 Spacer 12 Square steel pipe 13 Small gap 14 Fixing plate

Claims (4)

  It is a load-bearing wall frame constructed by building diagonal members in a rectangular frame, and the rectangular frame is arranged between upper and lower beams or between a beam and a base, and is composed of a structural material for supporting the vertical load of a building. The diagonal member is composed of an unbonded brace consisting of a brace body that is mounted with both ends laid on a rectangular frame, and a restraining member for restraining deformation in the out-of-plane direction while allowing axial displacement of the brace body. The bearing wall frame is characterized by that.   2. A load bearing wall frame comprising two or more unbonded braces constructed in a rectangular frame with an inclination direction with respect to a vertical direction opposite to each other.   A brace body made of steel strip is slidably inserted into the steel pipe so that both ends protrude from the steel pipe and a wooden spacer is interposed between both sides of the brace body and the inner surface of the steel pipe to form an unbonded brace. The bearing wall frame according to claim 1 or 2, wherein the deformation in the out-of-plane direction is constrained while allowing deformation of the brace body in the axial direction through a spacer.   A pair of square steel pipes are juxtaposed with each other through a small gap, and both side surfaces orthogonal to the juxtaposition direction of the pair of square steel pipes are fixed with a fixing plate to form a restraining member. A brace body made of steel strip is slidably inserted in a small gap to form an unbonded brace, and the deformation in the out-of-plane direction is constrained by a restraining member while allowing the brace body to deform in the axial direction. The bearing wall frame according to claim 1 or 2.

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