JP2017048606A - Brace material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brace material which saves space, which is light and which has excellent workability.SOLUTION: A brace material 1 includes: a plurality of wire rods 2; a connection member 3 connected to end parts of the plurality of wire rods 2 and for putting the plurality of wire rods 2 together and mounting them at a predetermined place; and a stiffener 4 for stiffening buckling of the wire rods 2 with respect to a compression action by covering the periphery of the plurality of wire rods 2. The brace material exhibits hysteresis camping characteristics by a tensile force and a compression force acting on the plurality of wire rods 2. The stiffener 4 is made of, for example, a concrete block having a plurality of through-holes 4a for inserting each wire rod 2 of the plurality of wire rods 2. The connection member is made of, for example, a member having a plurality of through-holes 31a for inserting the end part of each wire rod 2 of the plurality of wire rods 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a brace material, and more particularly to a brace material suitable as a brace material to be installed in a new or existing building such as a bridge pier, a building, a condominium, or a wooden house.

  In buildings and other structures, brace material is used as a structural element that resists horizontal forces such as seismic force and wind force. For example, Patent Document 1 describes a vibration-damping buckling restraining member as a brace material. The buckling restraining member of Patent Document 1 includes a steel outer tube provided outside a steel central axial force member, and a concrete filler is filled between the steel central axial force member and the steel outer tube. It is configured. The steel central axial force member is made of cross-section steel.

JP 2005-146773 A

  In the conventional brace material, a shape steel is used for the axial force member. For this reason, the shape and weight of the brace material are increased, and the workability is not excellent.

  The problem to be solved by the present invention is to provide a brace material that is space-saving, lightweight and excellent in workability.

  In order to solve the above problems, a brace material according to the present invention includes a plurality of wire members, a connecting member connected to an end portion of the plurality of wire members to collect the plurality of wire members and attach them to a predetermined place. And a stiffening material that covers a part or all of the plurality of wire rods and stiffens the buckling of the wire rod against the compression action.

  In the brace material according to the present invention, it is preferable that a hysteresis damping characteristic is exhibited by a tensile force and a compressive force acting on the plurality of wires. The plurality of wires are preferably composed of a combination of a tensile wire that acts on the tensile force but does not act on the compressive force, and a compressing wire that acts on the compressive force but does not act on the tensile force. The compression wire is preferably made of steel. It is preferable that the said wire for tension | pulling is comprised with the fiber bundle. It is preferable that the stiffener is a concrete block having a plurality of through holes through which the wires of the plurality of wires are inserted. It is preferable that the connection member is formed of a member having a plurality of through holes through which end portions of the plurality of wire rods are respectively inserted.

  According to the brace material according to the present invention, a plurality of wires are used for the axial force member instead of the conventional mold steel, so that the weight is light and the construction space can be reduced. For this reason, it is excellent in workability.

  Efficient stress sharing can be realized when a plurality of wires are composed of a combination of a tensile wire that acts on a tensile force but does not act on a compressive force, and a compressing wire that acts on the compressive force but does not act on the tensile force. When the wire for compression is made of a steel material, it has a large resistance to the compression force, so that an excellent hysteresis damping characteristic can be exhibited. When the tensile wire is composed of fiber bundles, it not only has a large resistance to the tensile force, but is also resistant to corrosion and reduces deterioration due to corrosion. When the stiffener is made of a concrete block having a plurality of through holes through which the wires of the plurality of wires are inserted, the brace material can be divided into components and assembled, so that workability is improved. When the connecting member is made of a member having a plurality of through holes through which the end portions of the plurality of wires are respectively inserted, the brace material can be divided into the constituent members and assembled, so that the workability is improved.

It is a brace material concerning one embodiment of the present invention, and is a front view (a) and a top view (b). It is the figure which looked at the stiffener of the brace materials shown in FIG. 1 from the axial direction. It is the figure which looked at the joining member of the brace materials shown in FIG. 1 from the axial direction. It is a figure explaining the movement when force acts on the wire for tension and the wire for compression in the brace material shown in FIG. 1, the state where the force is not applied (a), the state where the tensile force is applied (b ) And a state (c) in which a compressive force is applied. It is the figure which showed the modification of the stiffener of the brace materials shown in FIG. It is a front view of the brace material concerning other embodiments of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a brace material according to an embodiment of the present invention. Fig.1 (a) is a front view of a brace material, FIG.1 (b) is a top view of a brace material. FIG. 2 is a view of the stiffener of the brace material shown in FIG. 1 as viewed from the outside in the axial direction. FIG. 3 is a view of the joining member of the brace material shown in FIG. 1 as viewed from the outside in the axial direction. A brace material 1 according to an embodiment includes a plurality of wires 2, a connection member 3, and a stiffener 4.

  The plurality of wires 2 are axial force members of the brace material 1, and are arranged in parallel along the axial direction of the brace material 1, and are portions that receive compressive or tensile force due to the axial force. The plurality of wires 2 includes a combination of a tensile wire 21 and a compression wire 22. The tensile wire 21 is a wire that acts on the tensile force but does not act on the compressive force, and the compressing wire 22 is a wire that acts on the compressive force but does not act on the tensile force. Each wire 2 is made of a steel rod, and screw grooves 2c for screwing nuts are formed at both ends of each wire 2 respectively. As the steel bar, for example, a steel bar having a diameter of 40 mm or less is used. In the present embodiment, eight steel bars are used as the plurality of wires 2.

  The connecting member 3 is a member for collecting a plurality of wires 2 and is a member for attaching the brace material 1 to a predetermined place, for example, a bridge pier. The connecting member 3 includes a connecting member 3A on one side connected to one end portion 2a of the plurality of wires 2 and a connecting member 3B on the other side connected to the other side. Each of the connection members 3A and 3B is made of a metal flat plate, and is connected to a connection portion 31 to which each end of the plurality of wires 2 is connected. Similarly, the connection member 31 is made of a metal flat plate and is centered on the flat plate surface of the connection portion 31. And a mounting portion 32 erected from.

  A plurality of through holes 31 a are formed in the connecting portion 31 in the plate thickness direction for inserting the end portions of the wires 2 of the plurality of wires 2. In the present embodiment, eight through holes 31 a corresponding to the number of the wires 2 are formed in the connection portion 31. As shown in FIG. 2, the plurality of through holes 31 a are arranged around the base end of the mounting portion 32 that is erected from the center of the flat plate surface of the connection portion 31. The inner diameter of each through hole 31 a of the connection portion 31 is larger than the outer diameter of each wire 2. No thread groove is formed inside each through hole 31a. An insertion hole 32a through which a pin for pin joining is inserted is formed in the attachment portion 32 in the plate thickness direction.

  The stiffener 4 covers the periphery of the plurality of wires 2 and stiffens the buckling of the wires 2 against the compression action. The stiffener 4 is made of a concrete block. In the concrete block, a plurality of through holes 4 a into which the respective wires 2 of the plurality of wires 2 are respectively inserted are formed in the axial direction of the brace material 1. In the present embodiment, eight through holes 4 a corresponding to the number of the wires 2 are formed in the concrete block so as to correspond to the positions of the through holes 31 a of the connection portion 31. Inside each through hole 4a, a sheath tube 5 is disposed, and each wire 2 is inserted into each sheath tube 5. The inner diameter of each through hole 4 a of the stiffener 4 and the inner diameter of each sheath tube 5 are larger than the outer diameter of each wire 2. The stiffener 4 covers the periphery of the central portion excluding both ends in the length direction of the wire 2 and is configured to be shorter than the length of the wire 2.

  The brace material 1 is formed by assembling the plurality of wires 2, the connecting member 3, and the stiffener 4. Specifically, it is as follows.

  Each wire 2 of the plurality of wires 2 is inserted into each sheath tube 5 disposed inside the through hole 4 a of the stiffener 4. Each wire 2 is merely inserted into each sheath tube 5, and each wire 2 is not bonded to each sheath tube 5. Position adjusting nuts 6 are respectively screwed into both end portions 2 a and 2 b of each tensile wire 21 of the plurality of wires 2, and one position adjusting nut 6 A is on one side of the stiffener 4. The other side position adjusting nut 6 </ b> B is disposed at a position in contact with the other end of the stiffener 4. With this position adjusting nut 6, the position of the stiffener 4 with respect to the wire 2 is adjusted to the central portion in the length direction of the wire 2. The position adjusting nut 6 is not screwed to each compression wire 22 of the plurality of wires 2.

  One end portion 2a of each wire 2 inserted into each sheath tube 5 is inserted into each through hole 31a of the plurality of through holes 31a formed in the connection portion 31 of the one side connection member 3A. ing. Further, the other end portion 2b of each wire 2 inserted into each sheath tube 5 is respectively connected to each through hole 31a of the plurality of through holes 31a formed in the connection portion 31 of the other connection member 3B. It is inserted.

  The connecting nut 7 is screwed to the outer end 21a of the connecting member 3A on one side, and the connecting nut 7 is screwed on the inner side of the connecting portion 31 to the one end 21a of the pulling wire 21. Not matched. A connecting nut 7 is screwed to the other end 21 b of the pulling wire 21 on the outside of the connecting portion 31 of the connecting member 3 B on the other side, and the connecting nut 7 is connected to the inside of the connecting portion 31. Is not screwed. Then, the connecting nut 7 is screwed into the end 22 a on one side of the wire 22 for compression inside the connecting portion 31 of the connecting member 3 </ b> A on one side, and the connecting nut 7 is outside the connecting portion 31. Is not screwed. Further, the connecting nut 7 is screwed into the other end 22b of the compression wire 22 inside the connecting portion 31 of the connecting member 3B on the other side, and the connecting nut 7 is provided outside the connecting portion 31. Is not screwed. In this way, both ends of the plurality of wires 2 are connected to the connection members 3A and 3B, respectively.

  The brace material 1 which concerns on one Embodiment of the above structure can be used suitably as a brace material installed in new construction or existing buildings, such as a bridge pier, a building, a condominium, and a wooden house, for example. A tensile or compressive force acts on the brace material 1 installed at a predetermined location in the axial direction by a force such as seismic force or wind force. In the brace material 1, a plurality of wires 2 serve as axial force members, and exhibit a hysteresis damping characteristic by a tensile force and a compressive force acting on the plurality of wires 2. Then, next, the main function of this brace material 1 is demonstrated.

  As shown in FIG. 4A, when no force is acting in the axial direction of the brace material 1, the brace material 1 is in a stationary state, and each wire 2 is in a state where the end portions are aligned. And as shown in FIG.4 (b), when the tensile force T acts on the axial direction outer side of the brace material 1, the connection member 3 is pulled to an axial direction outer side. At this time, since the connecting nut 7 is screwed to the pulling wire 21 outside the connecting portion 31 of the connecting member 3, the connecting nut 7 is caught on the connecting portion 31 of the connecting member 3. A tensile force acts on the wire 21. On the other hand, since the connecting nut 7 is screwed into the compression wire 22 inside the connecting portion 31 of the connecting member 3, the connecting nut 7 is not caught by the connecting portion 31 of the connecting member 3 and is used for compression. No tensile force acts on the wire 22. Therefore, when the tensile force T acts on the outer side of the brace material 1 in the axial direction, the compression wire 22 does not resist, and the tension wire 21 resists. That is, for the tensile force, energy is attenuated by the deformation of the tensile wire 21.

  On the other hand, as shown in FIG. 4C, when the compressive force P acts on the inner side of the brace material 1 in the axial direction, the connecting member 3 is pushed inward in the axial direction. Since the connecting nut 7 is screwed inside the connecting portion 31 of the connecting member 3 to the compressing wire 22, the connecting nut 7 is caught by the connecting portion 31 of the connecting member 3, so that the compressing wire 22 The compression force acts. On the other hand, since the connecting nut 7 is screwed to the pulling wire 21 outside the connecting portion 31 of the connecting member 3, the connecting nut 7 does not catch on the connecting portion 31 of the connecting member 3, A compressive force does not act on the wire 21. Therefore, when the compressive force P acts on the inner side of the brace material 1 in the axial direction, the tensile wire 21 does not resist but the compressing wire 22 resists. That is, energy is attenuated with respect to the compressive force as the compressing wire 22 is deformed. The position adjusting nut 6 is not screwed into the compression wire 22. Thereby, the compressive force transmitted from the connection part 31 of the connection member 3 to the end part of the compression wire 22 via the connection nut 7 is arranged from the end part of the compression wire 22 to the inside of the stiffener 4. The compression wire 22 can be yielded inside the stiffener 4. Further, the stiffener 4 prevents buckling of the compression wire 22 inside the stiffener 4.

  As described above, in the brace material 1, the plurality of wires 2 resist both tensile force and compressive force. That is, the hysteresis damping characteristic is exhibited by the tensile force and the compressive force acting on the plurality of wires 2. Since the wire 22 for compression is comprised with the steel material, since it has big resistance with respect to compression force, the outstanding hysteresis damping characteristic can be exhibited. In the brace material 1, a plurality of wires 2 are composed of a combination of a tensile wire 21 that acts on the tensile force but does not act on the compressive force, and a compressing wire 22 that acts on the compressive force but does not act on the tensile force. Efficient stress sharing can be realized. When a compressive force is applied to the compression wire 22, the stiffening material 4 covering the periphery of the compression wire 22 suppresses the buckling of the compression wire 22, so that the buckling of the brace material 1 as a whole is suppressed.

  In the brace material 1, a plurality of wires 2 are axial force members. Each wire 2 is made of a steel rod and has a diameter of 40 mm or less. Each wire 2 is independent of each other. The required proof stress is adjusted by the outer diameter, the number, and the material of each wire 2, and the arrangement of the plurality of wires 2 does not particularly affect. Therefore, like the brace material 1, a plurality of wires 2 can be arranged thinly in one direction. That is, in the present invention in which a plurality of wire rods serve as axial force members, the axial force member can be designed to be dramatically thinner than conventional buckling-restrained braces made of cross-section steel. In addition, since a plurality of wire rods 2 are used for the axial force member instead of the conventional mold steel, it is lightweight and the construction space can be reduced. For this reason, it is excellent in workability. Moreover, since it is lightweight, it does not require construction by a large heavy machine, so construction is easy.

  In the brace material 1, the stiffener 4 is made of a concrete block having a plurality of through holes 4a through which the wires 2 of the plurality of wires 2 are respectively inserted. The connecting member 3 is made of a member having a plurality of through holes 31a through which end portions of the respective wire rods 2 of the plurality of wire rods 2 are respectively inserted. In this way, the brace material 1 can be assembled and divided into the constituent members. Since the member which comprises the brace material 1 can assemble the brace material 1, it becomes possible to respond flexibly to the delivery to the site and the construction surface. Excellent workability. The brace material 1 can be assembled on site, and it is easy to transport the members to the site. Partial replacement is also possible, reducing costs. And in this invention, since each structural member which can be assembled according to design tolerance can be set finely, the application to a narrow site | part is also possible.

  As mentioned above, this invention is not limited to the said embodiment, A various change is possible within the range which does not deviate from the meaning of this invention.

  For example, in the above-described embodiment, the plurality of wires 2 are a combination of the tensile wire 21 and the compression wire 22, but in the present invention, each wire 2 of the plurality of wires 2 has a tensile force and a compressive force, respectively. A configuration that acts on both of them and a configuration that does not share stress may be used. For example, in the above-described embodiment, the connection portion 31 of the connection member 3 is sandwiched between the end portions of the wire members 2 inserted into the through holes 31 a of the connection portion 31 of the connection member 3. When the connecting nut 7 is screwed to the outside and the inside, the end of each wire 2 is fixed to the connecting portion 31 of the connecting member 3, and the connecting member 3 and each wire 2 are integrated. Each wire 2 of the wire 2 is configured to act on both tensile force and compressive force.

  Moreover, in the said embodiment, although the position adjustment nut 6 is screwed together by the both ends 2a and 2b of each tension | tensile_strength wire 21, it is for position adjustment to either one edge part of each tension | tensile_strength wire 21, respectively. The nut 6 may be screwed together. In the above embodiment, the position adjusting nut 6 is not screwed to each compression wire 22, but the position adjusting nut 6 is screwed to one end of each compression wire 22. It may be a configuration. Further, in the above embodiment, the position adjusting nut 6 is not screwed into each compression wire 22, but for example, a rubber elastic body such as a rubber ring is sandwiched between the stiffeners 4 and the position adjusting nut 6 is used. The nut 6 may be configured to be screwed to either one or both ends of each compression wire 22. Moreover, in the said embodiment, although the nut 6 for position adjustment is not screwed by each compression wire 22, the ring-shaped member with which frictional resistance is ensured between each compression wire 22 is used as a stiffener. You may arrange | position in the edge part of each compression wire 22 in the position which contact | connects the edge part of 4, and one or both edge part.

  In the above-described embodiment, each wire 2 of the plurality of wires 2 is made of a steel rod. However, when the plurality of wires 2 are made of a combination of a wire for tension 21 and a wire for compression 22, a tension is applied. Since a compressive force does not act on the wire rod 21, a fiber bundle can be used for the tensile wire rod 21 instead of the steel rod. As the fiber of the fiber bundle, fibers having excellent tensile strength such as carbon fibers, plastic fibers such as aramid fibers and vinylon fibers, reinforced plastic fibers (FRP fibers), glass fibers, fibers formed from minerals such as basalt are used. be able to. When the tensile wire 21 is composed of a fiber bundle, it not only has a large resistance to the tensile force, but is also resistant to corrosion and reduces deterioration due to corrosion. It can also contribute to weight reduction.

  In the above embodiment, each wire 2 of the plurality of wires 2 is made of a steel rod. However, in the present invention, each wire 2 of the plurality of wires 2 is made of a rod of another metal material. It may be made of plastic rods, may be made of carbon rods, may be made of reinforcing bars, or may be made of fiber bundles. The bar may be any of various known bars such as a round bar with a round cross section, a round bar with a non-round cross section, a square bar, or a deformed bar.

  In the above embodiment, each wire 2 of the plurality of wires 2 has a diameter of 40 mm or less, but from the viewpoint of weight reduction, each wire 2 preferably has a diameter of 35 mm or less regardless of the material. More preferably, the diameter is 30 mm or less, and further preferably the diameter is 25 mm or less. On the other hand, from the viewpoint of yield strength, each wire 2 preferably has a diameter of 5 mm or more regardless of the material. More preferably, the diameter is 8 mm or more, and still more preferably, the diameter is 10 mm or more. In addition, the diameter φ is a diameter expressed as a diameter, an outer diameter, or a nominal diameter in the case of a rod, and in the case of a fiber bundle, the diameter converted to a rod having a circular cross section having the same cross-sectional area as the fiber bundle. Represented as: Each wire 2 of the plurality of wires 2 preferably has a yield strength of 200 MPa or more. More preferably, it is 1000 MPa or more. The yield strength is expressed as 0.2% yield strength for metal materials. For non-metallic materials, it is expressed in tensile strength.

  In the above embodiment, the stiffener 4 is made of a concrete block, but the concrete may be ordinary concrete, fiber reinforced concrete, high strength concrete, Ultra high strength fiber reinforced concrete may be used. The concrete block may be a concrete product (precast concrete) pre-manufactured in a factory or the like for assembly and installation at the site, or may be formed by on-site casting. Further, the stiffener 4 may be made of a metal block instead of the concrete block, may be made of wood, and may be made of a reinforced concrete block. Moreover, as shown in FIG. 5, it is good also as the stiffener 4A which consists of what filled the filling materials 9, such as powder and sand, in the steel pipe 8. FIG.

  Moreover, in the said embodiment, although the stiffener 4 consists of a concrete block and the sheath pipe | tube 5 is arrange | positioned inside the through-hole 4a, the sheath pipe | tube 5 does not need to be arrange | positioned. Further, although the stiffener 4 and the wires 2 of the plurality of wires 2 are not bonded, they may be bonded. However, when the stiffener 4 and the wires 2 of the plurality of wires 2 are not bonded, it is easier to calculate the strength of the entire brace material from the strength of each wire 2.

  Moreover, in the said embodiment, although each wire 2 is arranged side by side around the attaching part 32 of the connection member 3, the number and arrangement | positioning of a wire are not specifically limited. The number of wires can be adjusted according to the design strength, and the sizes of the stiffener and the connecting member can be changed according to the number of wires. Therefore, the brace material 1 according to the present invention can be applied to narrow parts by adjusting the constituent members.

  Moreover, in the said embodiment, although the stiffening material 4 is set as the structure which covers the circumference | surroundings of both the wire 21 for a tension | pulling, and the wire 22 for a compression, the stiffening material 4 carries out the buckling of the wire 2 with respect to a compression action. Since it is stiffening, in the configuration for sharing the stress, it is not necessary to have a configuration that covers both the tension wire 21 and the compression wire 22, and a configuration that covers only the compression wire 22. . For example, like the brace material 1A shown in FIG. 6, a compression wire 22 is arranged at the center in the width direction, and the periphery of the compression wire 22 is covered with a stiffening material 4B made of a concrete block or the like. The configuration may be such that the tensile wire 21 is disposed outside the stiffener 4B, and the periphery of the tensile wire 21 is not covered with the stiffener 4B. With this configuration, the volume of the stiffener can be reduced, which contributes to weight reduction and cost reduction.

  In this case, in the compression wire 22, the position adjusting nut 6 may be disposed at a position in contact with the other end of the stiffener 4 and not disposed at a position in contact with the one end. The compressive force acting on the compression wire 22 can be transmitted from one end portion of the compression wire 22 to which the position adjusting nut 6 is not screwed to the portion disposed inside the stiffener 4B. The compression wire 22 yields inside the stiffener 4B, and the stiffener 4B prevents buckling of the compression wire 22 inside the stiffener 4B. When the brace material 1A is arranged along the vertical direction, one side is arranged on the upper side and the other side is arranged on the lower side. Then, the position of the stiffener 4B with respect to the wire 2 is maintained at the central portion in the length direction of the wire 2 by the position adjusting nut 6.

In the embodiment shown in FIG. 6, the position adjusting nut 6 is screwed into either one end of each compression wire 22. For example, a rubber elastic body such as a rubber ring is used. The configuration may be such that the position adjusting nut 6 is screwed to one or both ends of each compression wire 22 sandwiched between the stiffener 4B.
Further, in the embodiment shown in FIG. 6, the position adjusting nut 6 is screwed into either one end of each compression wire 22. A configuration may be adopted in which a ring-shaped member that secures a frictional resistance with 22 is arranged at one or both ends of each compression wire 22 at a position in contact with the end of the stiffener 4.

DESCRIPTION OF SYMBOLS 1, 1A Brace material 2 Wire 21 Pulling wire 22 Compression wire 3 Connection member 3A One side connection member 3B The other side connection member 31 Connection part 31a (connection part) Through hole 32 Attachment part 32a (of attachment part) Insertion hole 4 Stiffener 4A Stiffener 4B Stiffener 4a (stiffener) through-hole 5 Sheath tube 6 Position adjustment nut 6A Position adjustment nut 6B On the other side Position adjustment nut 7 For connection Nut 8 Steel tube 9 Filling material T Tensile force P Compressive force

Claims (7)

  A plurality of wires, a connection member connected to the ends of the plurality of wires to collect the wires and attach them to a predetermined location, and a part or all of the periphery of the wires A brace material comprising: a stiffener for covering and stiffening the buckling of the wire against a compression action.   The brace material according to claim 1, wherein a hysteresis damping characteristic is exhibited by a tensile force and a compressive force acting on the plurality of wires.   The plurality of wires are composed of a combination of a tensile wire that acts on a tensile force but does not act on a compressive force, and a compressing wire that acts on the compressive force but does not act on the tensile force. 2. The brace material according to 2. The brace material according to claim 3, wherein the compression wire is made of steel.   The brace material according to claim 3 or 4, wherein the tensile wire is constituted by a fiber bundle.   The brace material according to any one of claims 1 to 5, wherein the stiffener comprises a concrete block having a plurality of through holes through which the wires of the plurality of wires are respectively inserted.   The brace material according to any one of claims 1 to 6, wherein the connection member includes a member having a plurality of through holes through which end portions of the plurality of wire members are inserted.

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