WO2017085930A1 - Brace member and method for assembling brace member - Google Patents

Abstract

The purpose of the present invention is to provide a highly deformable brace member and a method for assembling the same. The brace member 100 is provided with: a rod-shaped axial-force member 10; a stiffening pipe 20, the axial-force member passing through the interior thereof; a fixed-side base 30 joined to the fixed-side end, which is one longitudinal end of the stiffening pipe 20, and to one longitudinal end of the axial-force member 10; a slide-side base 60 joined to the other longitudinal end of the axial-force member 10; and a socket pipe 50 removably joined to the slide-side base 60 or the slide-side end, which is the other longitudinal end of the stiffening pipe 20. The brace member is characterized in that: the fixed-side base 30 and the slide-side base 60 are provided with joining elements 40, which are joints for installation in a building structure; and the socket pipe 50 surrounds the outer peripheral part of the slide-side end and the outer peripheral part of the slide-side base 60.

Description

Brace material and method for assembling brace material

The present invention relates to a brace material including an axial force material that absorbs seismic energy when an earthquake occurs and a stiffening tube that stiffens the material, and a method for assembling the brace material.

Conventionally, brace materials are installed in building structures as seismic, vibration-damping and seismic dampers to absorb seismic energy and reduce damage to main structural members such as pillars and beams of building structures. The buckling restrained brace is generally composed of an axial force member, a stiffening tube, and a joint for joining to the main frame. The buckling restrained brace is compressed in the axial direction by the vibration of the building structure due to the earthquake. The axial force material of the buckling restraint brace bears the compression in the axial direction of the buckling restraint brace. The buckling-restraining brace includes a stiffening tube that stiffens the deflection and buckling of the axial force material so that the axial force material does not buckle due to axial compression and plastically deforms in the axial direction of the brace material. The stiffening tube is provided so as to cover the periphery of the axial force material as a buckling restraining material for the axial force material without burdening the axial force input to the brace material. Due to the above structure, the buckling-restrained brace prevents the occurrence of overall buckling of the axial force material even when a compressive axial force is applied, or delays the generation time to cause stable axial deformation, thereby absorbing seismic energy. Is supposed to increase.

As a conventional technique, there is a brace material that can be easily manufactured by eliminating a welding operation for arranging an axial force member and a stiffener in a predetermined form, and can prevent an increase in weight. It is disclosed (for example, see Patent Document 1).

JP 2013-112949 A (page 4-5, FIG. 1)

In the brace material disclosed in Patent Document 1, clevises are screwed to both ends of an axial force member made of steel bar that penetrates the stiffening pipe. One end of the stiffening tube is screwed to one end of the axial force member via a stop ring that is screwed into the stiffening tube and the axial force member. A sleeve made of a steel pipe is screwed to the other end portion of the axial force member. The sleeve is substantially half of the longitudinal direction penetrating into the stiffening tube, and the remaining half is exposed from the stiffening tube. At this time, a gap of a predetermined size is formed between the outer periphery of the sleeve and the inner periphery of the stiffening tube. Therefore, this brace material can arrange | position an axial force material in a predetermined position with respect to a stiffening pipe | tube, without performing a welding operation.

However, the thickness of the sleeve needs to be smaller than half the difference between the inner diameter of the stiffening tube and the outer diameter of the axial force member. Further, the inner surface of the stiffening tube is preferably located at a position close to the outer surface of the axial force member in order to reduce the deflection of the axial force member and to exhibit sufficient supplementary rigidity. For this reason, there is a limit to the plate thickness that the sleeve can take. Due to such a limit, when the bending strength of the sleeve is small, there is a possibility that yielding due to bending may occur in the range exposed from the stiffening tube of the sleeve. Between the end face of the stiffening tube on the side where the sleeve is fixed and the clevis fixed on the end of the axial force member on the side where the sleeve is located, the axial force is not transmitted to the stiffening tube, but it expands and contracts in the axial direction. As a shrinkage allowance for the brace material provided for this purpose, the periphery of the axial force material is not covered with a stiffening tube. The periphery of the axial force member between the end face of the stiffening tube and the clevis is covered with a sleeve. However, when the sleeve yields, both ends of the brace are pin-supported by the clevis, so the entire structure becomes unstable, and the brace may be buckled as a whole. Prevents bending of the axial force material at the shrinkage margin of the brace, ensures appropriate bending rigidity and yield strength of the stiffening tube, and properly manages the shrinkage allowance of the brace during production, so that the axial force is applied to the stiffening tube. It is necessary to prevent the entire brace from buckling so as not to act excessively. Therefore, the axial force material is appropriately restrained by a mechanism replacing the sleeve, and the axial force material does not rotate and deform at the portion not covered by the stiffening tube at the end of the stiffening tube. There was a demand for a brace material with increased (high yield strength).

The present invention responds to the above requirements, and appropriately restrains the rotational deformation of the axial force material at the end of the buckling restraint material (stiffening tube), and the axial force is transmitted to the buckling restraint material (stiffening tube). It is an object of the present invention to provide a brace material that can appropriately secure a shrinkage allowance for expanding and contracting in the axial direction and an assembly method of the brace material.

(1) A brace material according to the present invention includes a rod-shaped axial force material, a stiffening tube through which the axial force material penetrates, and a fixed-side end portion that is one end portion in the longitudinal direction of the stiffening tube. And a fixed side base joined to one end in the longitudinal direction of the axial force member, a sliding side base joined to the other end in the longitudinal direction of the axial force material, and the auxiliary A sliding-side end that is the other end in the longitudinal direction of the rigid pipe or a socket pipe that is detachably joined to the sliding-side base, and the fixed-side base and the sliding-side base are architectural A joining element serving as a joint for installation in a structure is provided, and the socket tube surrounds an outer peripheral portion of the sliding side end portion and an outer peripheral portion of the sliding side base.

(2) In the brace material according to (1), the socket tube and the stiffening tube or the sliding side base are screwed together.
(3) In the brace material of the above (1) and (2), the axial force member has male threads at both end portions, and the fixed side base and the sliding side base have the axial force member. There is a hole to be inserted, and the hole includes a cylindrical portion and a female screw into which the axial force member is screwed on the back side of the cylindrical portion when viewed from the direction in which the axial force member is inserted. The axial force member, the fixed side base, and the sliding side base are joined by screwing of the male screw and the female screw.
(4) In the brace material of the above (1) to (3), the sliding side cap extends from the end surface of the sliding side end of the stiffening tube to the surface of the sliding side cap facing the end surface. The axial force member is joined so that there is a gap between them.
(5) In the brace material of the above (1) to (4), the joining element protrudes in a direction opposite to the side where the axial force member and the stiffening tube are joined, and the fixed side cap and the sliding member It is characterized by being joined to each of the moving side caps.
(6) Further, in the brace material of the above (1) to (5), the inner diameter of the socket tube surrounding the stiffening tube is constant in the longitudinal direction, and the outer diameter of the range is the stiffening member. It is characterized by becoming smaller as it approaches the center in the longitudinal direction of the tube.

(7) Further, the method for assembling the brace material according to the present invention includes a rod-shaped axial force member, a stiffening tube through which the axial force member passes, and one end portion in the longitudinal direction of the stiffening tube. A fixed side base joined to one fixed side end and joined to one end in the longitudinal direction of the axial force member, and a sliding side joined to the other end in the longitudinal direction of the axial force member And a socket tube that is detachably joined to the sliding side end that is the other end in the longitudinal direction of the stiffening tube or the sliding side cap, and the fixed side cap and the sliding The side cap is provided with a joining element that serves as a joint for installation in a building structure, and the socket tube is an assembly of braces that surrounds the outer periphery of the sliding side end and the outer periphery of the sliding side cap. A fixed side base joining step for joining the fixed side base and the axial force member; and the fixed side base and the auxiliary side. A stiffening tube fixing step for joining a rigid tube, a socket tube fitting step for passing the socket tube through an outer peripheral portion of the sliding side end of the stiffening tube, the sliding side cap and the axial force member And a socket tube joining step for joining the socket tube to the stiffening tube or the slide side die, and the socket tube joining step includes the fixed side die. It is carried out after the joining step, the stiffening tube fixing step, the socket tube fitting step, and the sliding side cap fixing step.
(8) In the method for assembling the brace material of (7), the sliding side base fixing step is performed after the fixed side base joining step and the stiffening tube fixing step, and the sliding of the stiffening tube is performed. It includes a gap adjustment step from the end surface of the side end portion to the surface of the sliding side base facing the end surface.

(I) In the brace material according to the present invention, one end portion (fixed side end portion) of the stiffening tube in the longitudinal direction is joined to the fixed base, and the other end portion (sliding in the longitudinal direction of the stiffening tube) The outer periphery of the side end portion is surrounded by the socket tube. The socket tube surrounds the outer periphery of the stiffening tube, and there is no restriction on the outer diameter and the plate thickness, and the socket tube can be enlarged. Therefore, the bending strength and rigidity of the socket tube can be increased. Between the sliding side end of the stiffening tube and the sliding side base, deformation is constrained by a highly rigid socket tube, and between the sliding side end of the stiffening tube and the sliding side base. Occurrence of buckling and bending of the axial force material can be suppressed. As a result, a brace material having a high bending strength and hardly buckling can be obtained.

(Ii) The socket tube and the stiffening tube or the sliding side base are detachably joined. Thereby, an assembly is easily possible at the time of manufacture of a brace material. In addition, the dimension between the sliding side end of the stiffening tube and the sliding base is visible, making it easy to manage the dimensions during manufacturing, and in turn, managing the deformation performance of the brace material. Thus, a highly reliable brace material can be obtained. In a state where the brace material is attached to the building structure, after the vibration of the building due to an earthquake or the like is input to the brace material, the socket tube is removed, and the gap between the sliding side end of the stiffening tube and the sliding side base is removed. Check the axial force material visually. Thereby, it becomes possible to visually recognize the damage state of the axial force member.
(Iii) The axial force member is inserted into a hole provided in the fixed side base and the sliding side base, and is screwed and joined by a female screw located on the inner side of the cylindrical portion of the hole. With this configuration, even when bending deformation occurs in the male screw provided on the axial force member, the bending deformation around the male screw of the axial force member can be restrained by the cylindrical portion. The proof stress can be improved.
(Iv) The sliding side base is joined with a gap between the end face of the sliding side end of the stiffening tube and the surface (end face) of the sliding side face facing the end face. Thereby, even if the force from the building structure is applied to the brace material, no force (axial force) is applied in the axial direction of the stiffening tube. With this structure, it is not necessary to increase the strength of the stiffening tube, so the cost of the stiffening tube can be reduced.
(V) The joining element protrudes in a direction opposite to the side where the axial force member and the stiffening tube are joined, and is joined to each of the fixed side base and the sliding side base. By making the joining element separate from the fixed side base and the sliding side base and joining them later, the joint elements can be made common and the cost can be reduced. Corresponding to each building structure, the joining elements can be replaced.
(Vi) The inner diameter of the socket tube in the range surrounding the stiffening tube is constant in the longitudinal direction, and the outer diameter of the range is a tapered shape that becomes smaller toward the center in the longitudinal direction (axial direction) of the stiffening tube. It becomes. By making the outer diameter of the socket tube into a tapered shape, the strength of the brace material at each position in the longitudinal direction can be secured, and the weight reduction can be promoted and the design can be improved.

(Vii) The socket tube joining step is performed after the fixed side cap joining step, the stiffening tube fixing step, the socket tube fitting step, and the sliding side cap fixing step, thereby sliding the stiffening tube described above. The brace material can be assembled while visually recognizing the dimension between the side end and the sliding base.
(Viii) The sliding side cap fixing step includes a gap adjustment step of adjusting the distance from the end surface of the sliding side end of the stiffening tube to the surface of the sliding side cap facing the end surface, thereby providing stiffening. The dimension between the sliding side end of the tube and the sliding side base can be adjusted to a desired length, and more accurate dimension management is possible.

FIG. 1 is a side view of a brace material according to Embodiment 1 of the present invention. FIG. 2 is a view showing a cross section passing through the central axis of the brace material of FIG. FIG. 3 is an enlarged view of a cross section of the brace material of FIG. 1 on the fixed base side. FIG. 4 is an enlarged view of a cross section of the brace material of FIG. 1 on the sliding side base side. FIG. 5 is a diagram for explaining the structure of a conventional brace material as a comparative example. FIG. 6 is a cross-sectional view in side view for explaining a test body to be subjected to a loading test for confirming the performance of the brace material according to the first embodiment of the present invention and defining the length of each part. . FIG. 7 is a load-strain diagram showing the result of a loading test for confirming the performance of the brace material according to Embodiment 1 of the present invention. As a result of No. 1, (b) shows the test specimen No. The result of 2. FIG. 8 is a load-strain diagram showing the result of a loading test for confirming the performance of a conventional brace material as a comparative material. FIG. 9 is a view showing a cross section passing through the central axis of the brace material according to the second embodiment of the present invention, and is a view for explaining the structure around the socket tube.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Each figure is shown schematically, and the relative size and thickness of each member are not limited to the illustrated dimensions. In the following drawings, the size relationship of each component may be different from the actual one. In the figure, when the reference numerals attached to the respective parts are not attached with subscripts (a, b, etc.) other than numerals, the reference numerals with subscripts are collectively referred to.

[Embodiment 1]
FIG. 1 is a side view of a brace material according to Embodiment 1 of the present invention. FIG. 2 is a view showing a cross section passing through the central axis of the brace material of FIG. Moreover, in FIG.1 and FIG.2, the longitudinal direction of a brace material is abbreviate | omitted and shown. The left side in FIGS. 1 and 2 is referred to as “one in the longitudinal direction”, and the right side is referred to as “the other in the longitudinal direction”.

The brace material 100 includes a rod-shaped axial force member 10 and a cylindrical stiffening tube 20 that covers the outer periphery of the axial force member 10. The central axis 101 is the central axis of the brace material 100 and is the same as the central axis of the axial force material 10. The center of the stiffening tube 20 is also arranged at the same position as the central axis 101. That is, the axial force member 10 penetrates the center inside the cylindrical stiffening tube 20 in the longitudinal direction. The axial force member 10 is surrounded by the stiffening tube 20 and its deformation is restricted. One end portion 11 a in the longitudinal direction of the axial force member 10 is joined to the fixed side cap 30. The fixed side end 21 a which is one end in the longitudinal direction of the stiffening tube 20 is also joined to the fixed side base 30.

The other end portion 11 b in the longitudinal direction of the axial force member 10 is joined to the sliding side base 60. The sliding side end 21 b that is the other end in the longitudinal direction of the stiffening tube 20 is disposed at a distance A from the sliding side base 60. That is, a gap is provided between the end surface of the sliding side end portion 21b of the stiffening tube 20 and the surface of the sliding side base 60 facing the end surface. The sliding-side end portion 21b of the stiffening tube 20 is surrounded on the outer periphery by a socket tube 50 having an inner cylindrical shape. The end of the socket tube 50 on the sliding side base 60 side is detachably joined to the sliding side base 60.

The fixed side base 30 and the sliding side base 60 are joined with a clevis 40 protruding in the opposite direction to the side on which the axial force member 10 is joined. The clevis 40 corresponds to the “joining element” of the present invention. In the clevis 40, the one joined to the fixed base 30 is called a clevis 40a, and the one joined to the sliding side base 60 is called a clevis 40b. The clevis 40a is referred to as a “first joining element” of the present invention, and the clevis 40b is referred to as a “second joining element”. The clevis 40 serves as a joint for installing the brace material 100 in a building structure (not shown).

FIG. 3 is an enlarged view of a cross section of the brace material of FIG. 1 on the fixed side cap 30 side. 4 is an enlarged view of a cross section of the brace material of FIG. Hereinafter, the details of each component will be described with reference to FIGS. 3 and 4.

(Axial force material)
The axial force member 10 is a long material and is a steel bar having a circular cross section. In the first embodiment, an axial force member 10 which is a steel rod having a circular cross section is shown. The axial force member 10 may be formed by joining a steel pipe or a flat plate in a cross-section, and the cross-sectional shape of the brace member 100 cut by a plane perpendicular to the central axis 101 is not limited. A male screw 12 a is formed at one end 11 a in the longitudinal direction of the axial force member 10. A male screw 12b is formed at the other end 11b in the longitudinal direction of the axial force member 10. When the axial force member 10 is formed of a plastically deformable material, it absorbs energy input to the brace material 100 when the axial force member 10 is plastically deformed, and has a higher effect as an anti-seismic and damping damper. can get. To prevent abnormal noise when the outer peripheral surface of the axial force member 10 and the inner peripheral surface of the stiffening tube 20 slide, and excessive increase in the axial force due to friction between the axial force member 10 and the stiffening tube 20. In order to prevent this, for example, a liner material made of synthetic resin may be installed on the outer peripheral surface of the axial force member 10.

(Stiffening tube)
The stiffening tube 20 is a steel tube having a circular cross section, and the axial force member 10 can penetrate through the tube. The stiffening tube 20 is not limited to a cylindrical shape. The stiffening tube 20 only needs to be able to restrain the deflection so that the axial force member 10 does not buckle when the axial force member 10 is bent by the axial force. For example, the stiffening tube 20 may be a cylinder having a square cross section.

The longitudinal dimension of the stiffening tube 20 is such that when the one end portion 11a of the axial force member 10 and the fixed side end portion 21a of the stiffening tube 20 are fixed to the fixed side cap 30, the stiffening tube 20 slides. The other end portion 11b of the axial force member 10 protrudes from the side end portion 21b. In the first embodiment, the stiffening tube 20 is shorter than the axial force member 10. Further, a male screw 22a is formed on the outer peripheral side of the fixed-side end portion 21a of the stiffening tube 20. The male screw 22 a is screwed with a stiffening tube screwed female screw portion 34 formed on the fixed side cap 30. In the fixed base 30, the stiffening tube 20 and the axial force member 10 are fixed so as not to move relatively in the longitudinal direction.

As shown in FIG. 4, the distance A is from the end surface of the sliding side end 21 b of the stiffening tube 20 to the end surface of the sliding side base 60 joined to the end 11 b of the axial force member 10. It has been. In the first embodiment, the brace material 100 is designed on the assumption that no axial force (force acting in the direction of the central axis 101 of the brace material 100) is input to the stiffening tube 20 because the distance A is taken. be able to. When designed on the assumption that no axial force is input to the stiffening tube 20, the stiffening tube 20 can be made thinner and smaller in outer diameter than the case where the axial force acts. Thereby, it is not necessary to enlarge the stiffening tube 20, and the cost and weight of the brace material 100 can be suppressed. Therefore, it is important to appropriately manage the distance A in order to ensure the deformation performance of the brace so that the axial force is not transmitted to the stiffening tube 20. The distance A is appropriately determined depending on the size and material of the brace material 100 and the building structure to be applied.

(Fixed side cap)
The fixed side cap 30 has a cylindrical shape, and a hole 31 is opened from one end of the cylindrical shape to the center. A female screw 33 is formed on the back side of the hole 31. The axial force member 10 is joined to the fixed base 30 by the male screw 12 a being inserted into the hole 31 and screwed with the female screw 33 formed on the back side of the hole 31. The hole 31 may penetrate the fixed side cap 30 or may be a bag hole. The axial force member 10 can be inserted into the hole 31 from one side, and provided with a support portion 32 that comes into contact with the axial force member 10 when the axial force member 10 is deformed in front of the female screw 33. Deformation at the male screw 12a when receiving force can be suppressed.

In the first embodiment, the male screw 12a of the axial force member 10 is screwed with the fixed base 30 that is the counterpart component, but in the state where the brace material 100 is completed, the male screw 12a is screwed with the female screw 33 at the mouth portion of the female screw 33. There may be a case where the male screw portion 13a does not occur. The male screw portion 13a is specifically an incomplete screw portion of the male screw 12a, or is not screwed because the male screw 12a is longer than the female screw 33 due to a dimensional error of the axial force member 10 or the fixed side cap 30. Part.

The axial force member 10 is deformed by receiving an axial force due to vibration of the building structure, and may be deformed in the bending direction at that time. The unthreaded male thread portion 13a is threaded and has a smaller cross-sectional area than the other cylindrical portion of the axial force member 10, so that the strength and rigidity are low, and stress concentration is likely due to the thread valley shape. It has a shape. Therefore, when the axial force member 10 is deformed, there is a high possibility that the axial force member 10 is deformed from the male screw portion 13a that is not screwed and becomes a starting point of damage to the axial force member 10. Therefore, when the axial force member 10 is deformed, the axial force member 10 is brought into contact with the support portion 32 to suppress deformation around the male screw portion 13a that is not screwed, thereby improving the proof stress of the axial force member 10. Can do.

Note that a gap is required between the inner diameter of the support portion 32 and the outer diameter of the axial force member 10, but it is desirable that the gap is as small as possible. Further, the dimension of the support portion 32 in the direction of the central axis 101 can further suppress deformation of the axial force member 10 around the male screw portion 13a that is not screwed in the longer direction.

Further, a cylindrical recess having a predetermined depth from the end face of the fixed base is provided on the mouth side of the hole 31, and a stiffening tube threaded female thread portion 34 is provided on the inner peripheral portion of the cylindrical shape. Is provided. The stiffening tube threaded female thread portion 34 is provided concentrically with the hole 31. The stiffening tube 20 is screwed into the stiffening tube screwing female thread portion 34 and joined so as not to move relative to the axial force member 10 in the direction parallel to the central axis 101 of the brace material 100.

A cylindrical recess having a predetermined depth from the end surface is provided on the end surface of the fixed-side base 30 on the side opposite to the end surface on which the stiffening tube screwing female thread portion 34 is provided. A clevis screwed female thread portion 37 is provided on the inner peripheral portion of the clevis. A male screw provided on the clevis 40 a is joined to the clevis screwed female screw portion 37.

A taper portion 35 and a chamfered portion 36 whose outer diameter decreases toward the respective end surfaces are formed on the ridgeline between the end surface and the outer periphery of the fixed side cap 30. Thereby, after ensuring the intensity | strength in each position of the longitudinal direction of the fixed side nozzle | cap | die 30, promotion of weight reduction and improvement of the design property can be aimed at. The taper portion 35 and the chamfered portion 36 can be appropriately changed in size. Depending on strength or design, the tapered portion 35 may be changed to chamfering, or the chamfered portion 36 may be changed to a tapered shape.

(Sliding side cap)
The sliding side cap 60 has a cylindrical shape, and a hole 61 is opened from one end of the cylindrical shape to the center. A female screw 63 is formed on the back side of the hole 61. The axial force member 10 is inserted into the hole 61, screwed into a female screw 63 formed on the back side of the hole 61, and joined to the sliding side base 60. The hole 61 may penetrate the sliding base 60 or may be a bag hole. Similarly to the hole 31 of the fixed side cap 30, the axial force member 10 can be inserted into the hole 61 of the sliding side cap 60 from one side. When the axial force member 10 receives an axial force, the hole 61 includes a support portion 62 that comes into contact with the axial force member 10 when the axial force member 10 is deformed in front of the female screw 63 in the insertion direction of the axial force member 10. Deformation of the male screw 12b can be suppressed. When the axial force member 10 is deformed, there is a high possibility that the axial force member 10 is deformed from the unthreaded male screw portion 13b and becomes a starting point of breakage of the axial force member 10. However, the proof stress of the axial force member 10 can be improved by causing the axial force member 10 to come into contact with the support portion 62 and suppressing deformation around the male screw portion 13b that is not screwed.

In addition, like the hole 31 of the fixed base 30, a gap is required between the inner diameter of the support portion 62 and the outer diameter of the axial force member 10, but the gap is preferably as small as possible. Further, it is desirable that the dimension of the support portion 62 in the direction of the central axis 101 is longer, and deformation of the axial force member 10 around the male screw portion 13b that is not screwed can be further suppressed.

A step is formed on the outer periphery of the end face of the sliding side base 60 on the side where the axial force member 10 is inserted, and the central portion of the sliding side base 60 is smaller in diameter than the outer periphery of the sliding side base 60. The cylinder protrudes toward the end face. The outer periphery of the cylinder is a socket pipe threaded male screw portion 64 to which the socket pipe 50 is screwed.

A cylindrical recess having a predetermined depth from the end surface is provided on the end surface of the sliding side base 60 opposite to the end surface on which the socket pipe screwing male screw portion 64 is provided. A clevis screwed female threaded portion 67 is provided on the inner peripheral portion of the. A male screw provided on the clevis 40 b is joined to the clevis screwed female screw portion 67.

A chamfered portion 66 is formed on the ridgeline between the end face of the sliding side base 60 on the side where the clevis 40b is joined and the outer periphery. Thereby, the sliding side cap 60 can ensure safety and durability, promote weight reduction, and improve design. The dimension of the chamfered portion 66 can be changed as appropriate, and may be changed to a tapered shape depending on strength or design.

(Clevis)
The clevis 40 functions as a joint for installation in a building structure (not shown), and includes a disc-like portion 41, a plate-like portion 42 installed on one end face of the disc-like portion 41, a plate A mounting hole 44 penetrating through the cylindrical portion 42 and a male screw 43 formed on the outer periphery of the disc-shaped portion 41. The center line of the mounting hole 44 and the center line of the male screw 43 intersect at a right angle. However, the term “intersection” does not mean that the geometrical intersection is accurate, and an industrial error is allowed. The clevis 40 is screwed to the fixed side base 30 and the sliding side base 60, respectively. If the clevis 40a and the clevis 40b have the same shape, the cost of the brace material 100 as a whole can be reduced. However, the clevis 40a and the clevis 40b may have different shapes depending on the building structure to which the brace material 100 is applied.

In the first embodiment, the fixed side cap 30 and the sliding side cap 60 and the clevis 40 are separately manufactured and integrated by screw connection, but the present invention is not limited to this. . The fixed side base 30 and the sliding side base 60 and the clevis 40 may be integrated by mechanical joining such as shrink fitting or metallurgical joining such as welding, or integrally from the beginning by casting or the like. May be manufactured.

(Socket tube)
The socket tube 50 is provided with a through hole 51 in the inner longitudinal direction, and has a tapered portion 52 and a cylindrical portion 55 on the outer peripheral side. The socket tube 50 has a sliding-side base screwed female screw 54 formed inside the cylindrical portion 55. The socket-side threaded male screw portion 64 of the sliding-side base 60 is screwed into the sliding-side base screwed female screw 54, and the socket pipe 50 and the sliding-side base 60 are joined. The through hole 51 surrounds the sliding side end 21 b of the stiffening tube 20. The inner surface of the through hole 51 and the outer peripheral surface of the stiffening tube 20 are arranged with a gap. The clearance B between the inner surface of the through hole 51 and the outer peripheral surface of the stiffening tube 20 and the length C in the longitudinal direction in which the through hole 51 surrounds the sliding side end 21b of the stiffening tube 20 are determined by the brace material. As appropriate according to the assembly accuracy of 100, the accuracy of each part such as the stiffening tube 20, the fixed side cap 30, the axial force member 10, the sliding side cap 60, the socket tube 50, the deflection of the axial force member 10, etc. It is decided.

When the brace material 100 receives an axial force due to the vibration of the building structure, the axial force material 10 bends. The deflection of the portion of the axial force member 10 covered by the stiffening tube 20 is restrained by the stiffening tube 20. However, there is a distance A from the sliding end 21b of the stiffening tube 20 to the sliding base 60, and the deflection of the axial force member 10 is not constrained in this section. Therefore, the clearance B and the length C may be set within the range of the deformation amount of the axial force member 10 that is allowed in the interval where the deflection of the axial force member 10 is not restrained (distance A).

The tapered portion 52 becomes smaller as the outer diameter approaches the tip 57. While reinforcing the stiffening tube 20, the external surfaces from the sliding base 60 to the stiffening tube 20 are smoothly connected, so that the design is improved while ensuring the strength. In addition, the taper part 52 is good also as a normal cylindrical shape.

(Assembly method of brace material 100)
The brace material 100 has the structure described above, and an assembly method thereof will be described below. First, the female screw 33 of the fixed side cap 30 and the male screw 12a of the axial force member 10 are screwed together. This step corresponds to the “fixed side cap joining step” of the present invention. Then, the stiffening tube threaded female screw portion 34 of the fixed side cap 30 and the male screw 22a of the stiffening tube 20 are screwed together. This step corresponds to the “stiffening tube fixing step” of the present invention. Thereafter, the sliding side end 21 b of the stiffening tube 20 is passed through the through hole 51 of the socket tube 50. This step corresponds to the “socket pipe fitting step” of the present invention. The order of these three steps can be determined as appropriate for the convenience of manufacturing.

After the above steps are completed, the axial force member 10 is passed through the hole 61 of the sliding side base 60, and the female screw 63 and the male screw 12b of the axial force member 10 are joined. This step corresponds to the “sliding side cap fixing step” of the present invention. When this step is completed, the distance A from the end face of the sliding side end 21b of the stiffening tube 20 to the end face of the sliding side base 60 joined to the end 11b of the axial force member 10 is determined. In this step, the dimension (distance A) from the end surface of the sliding side end portion 21b of the stiffening tube 20 to the surface of the sliding side base 60 facing the end surface is further confirmed, and the distance A is set as necessary. A step of adjusting can be included. This step corresponds to the “gap adjusting step” of the present invention. The deformation performance of the brace material 100 can be managed as designed by the sliding side cap fixing process and the gap adjusting process.

Thereafter, the sliding side cap screwed female screw 54 of the socket tube 50 is screwed to the socket pipe screwed male screw part 64 of the sliding side cap 60. This step corresponds to the “socket pipe joining step” of the present invention. The process of attaching the clevis 40a to the fixed base 30 and the process of attaching the clevis 40b to the sliding base 60 may be performed in advance before the assembly process of the brace material 100 or the brace material. You may implement after the assembly process of 100 is completed. Further, when the clevis 40 is integrally formed with the fixed side cap 30 and the sliding side cap 60 in advance, the assembly process of the clevis 40 is not required.

(Comparative example)
FIG. 5 is a diagram for explaining the structure of a conventional brace material 900 as a comparative example. The prior art brace material 900 has a distance A2 from the integral clevis 960 to the end of the stiffening tube 920. Similar to the brace material 100 of the first embodiment, when the brace material 900 receives an axial force, the axial force material 910 at the distance A2 is bent and deformed. In the conventional brace material 900, the sleeve 970 is disposed between the stiffening tube 920 and the axial force member 910, and surrounds the outer periphery of the axial force member 910 between the integrated clevis 960 and the stiffening tube 920. With this structure, the bending strength of the portion of the axial force member 910 that is easily bent and deformed is improved. However, in the prior art, since the thickness of the sleeve 970 is limited due to the structure, the bending strength of the axial force member 910 may not be ensured sufficiently.

(Operational effect of the brace material 100 of the first embodiment)
In the brace material 100 according to the first embodiment, the fixed-side end 21a, which is one end in the longitudinal direction of the stiffening tube 20, is joined to the fixed-side base 30, and the other end in the longitudinal direction of the stiffening tube 20 is used. A predetermined range from the sliding side end portion 21 b, which is a portion, is surrounded by the through hole 51 of the socket tube 50. Since the socket tube 50 surrounds the outer periphery of the stiffening tube 20 and its thickness is not limited, the outer diameter and the plate thickness are increased compared to the sleeve 970 of the brace material 900 of the prior art. be able to. In the present invention, the deformation of the axial force member 10 is constrained between the sliding-side end portion 21b of the stiffening tube 20 and the sliding-side base 60 by the socket tube 50 having high rigidity. Occurrence of buckling and bending of the axial force member 10 between the sliding side end 21b and the sliding side base 60 is suppressed. Thereby, the brace material 100 with high bending strength is obtained.

The socket tube 50 and the sliding side cap 60 are detachably joined. Thereby, an assembly is easily possible at the time of manufacture of the brace material 100. FIG. Further, the dimension between the sliding side end portion 21b of the stiffening tube 20 and the sliding side base 60 can be visually recognized, the dimension management at the time of manufacture is easy, and the deformation performance of the brace material 100 is eventually achieved. Management becomes easier. In a state where the brace material 100 is attached to the building structure, after the vibration of the building due to an earthquake or the like is input to the brace material 100, the socket tube 50 is removed and the sliding side end portion 21b of the stiffening tube 20 slides. The axial force member 10 can be visually confirmed from between the side cap 60. Thereby, it becomes possible to visually recognize the damage state of the axial force member 10 directly.

Both ends of the axial force member 10 are joined to the fixed base 30 and the sliding base 60 with screws. By attaching each screw in the opposite direction (for example, the male screw 12a and the female screw 33 are set to the right screw, and the male screw 12b and the female screw 63 are set to the left screw) The distance between the hole 44a and the mounting hole 44b can be adjusted. Therefore, installation of the brace material 100 to a building structure is facilitated.

The axial force member 10 is inserted into the hole 31 and the hole 61 provided in the fixed base 30 and the sliding base 60, and is screwed together with the female screw 33 and the female screw 63 on the back side of the hole 31 and the hole 61. Be joined. With this configuration, even when bending deformation occurs around the male screw 11 provided on the axial force member 10, the bending deformation around the male screw 11 of the axial force member 10 is caused by the support portion 32 and the support portion 62. Since it can restrain, the proof stress of the axial force material 10 can be improved.

The sliding side base 60 is joined with a distance A between the end face of the sliding side end portion 21b of the stiffening tube 20 and the surface of the sliding side base 60 facing the end face. Thereby, even if the force from the building structure is applied to the brace material 100, no force (axial force) is applied in the axial direction of the stiffening tube 20. With this structure, it is not necessary to increase the strength of the stiffening tube 20, so the cost of the stiffening tube 20 can be reduced.

The clevis 40 (corresponding to the “joining element” of the present invention) protrudes in the direction opposite to the side where the axial force member 10 and the stiffening tube 20 are joined, and the fixed side cap 30 and the sliding side cap 60 It is joined to each. By making the clevis 40 separate from the fixed side cap 30 and the sliding side cap 60 and joining them later, the clevis 40 can be shared and the cost can be reduced. Moreover, it becomes possible to replace a joining element corresponding to each building structure.

The outer diameter of the socket tube 50 becomes smaller toward one end surface 50a (tip) in the longitudinal direction (as it approaches the longitudinal center of the stiffening tube 20). Therefore, after ensuring the strength of the brace material 100 at each position in the longitudinal direction, it is possible to promote weight reduction and improve design properties.

In the assembly of the brace material 100, the socket tube joining step is performed after the fixed side cap joining step, the stiffening tube fixing step, the socket tube fitting step, and the sliding side cap fixing step. The brace material 100 can be assembled while visually recognizing the dimension between the sliding end 21b of the tube 20 and the sliding base 60. Furthermore, the sliding side cap fixing step includes a clearance adjustment step from the end surface of the sliding side end portion 21b of the stiffening tube 20 to the surface of the sliding side cap 60 facing the end surface, thereby further improving accuracy. The dimension A can be managed, and the deformation performance of the brace material 100 can be managed as designed.

In Embodiment 1, each joint portion of the brace material 100 is joined by a screw, but may be joined not only by a screw but also by other means. However, the joint portion between the socket tube 50 and the sliding side base 60 needs to be joined by a detachable joining method even after the brace material 100 is completed. For example, the socket tube 50 may be fixed from the side using a set screw.

 

(Test specimen)
FIG. 6 is a cross-sectional view in side view that defines the length of each part for explaining a test body to be subjected to a loading test for confirming the performance of the brace material 100 according to Embodiment 1 of the present invention. is there. In addition, description of a part of code | symbol is abbreviate | omitted. Table 1 shows the dimensions and the like of each part of the specimen (No1, No2).

In FIG. 1 and Specimen No. 1 2, the outer diameter of the axial force member 10 is referred to as “D _S ”. The yield point of the axial force member 10 is referred to as “σ _y ”, and the product of the cross-sectional area of the axial force member 10 and the yield point σ _y is referred to as “N _y ”. The outer diameter of the stiffening tube 20 is “D _B ”, the plate thickness is “t _B ”, and the length of a part of the clevis 40 and the socket tube 50 from the other end face 20 b in the longitudinal direction of the stiffening tube 20. The distance from the other end surface 20b in the longitudinal direction of the stiffening tube 20 to the one end surface 50a in the longitudinal direction of the socket tube 50 is defined as “l _c (LC)”. It is called “l _k ”. The distance from the center of the mounting hole 44a of the clevis 40a to the other end face 30b of the fixed side cap 30 is " _F l _J (FELJ)", and the other end face 30b of the fixed side cap 30 is one end face 50a of the socket tube 50. the distance to the _{"l B} (LB AG)", the distance from one end surface 50a of the socket pipe 50 to the mounting hole 44b of the clevis 40b _"M l _J (Emuerujei)", referred respectively.

The distance from the center of the mounting hole 44a of the clevis 40a to the center of the mounting hole 44b of the clevis 40b is referred to as “l”. Furthermore, the difference between the outer diameter of the axial force member 10 and the inner diameter of the stiffening tube 20 is “e _S (Es)”, and the difference between the outer diameter of the stiffening tube 20 and the inner diameter of the socket tube 50 is “e _k ( EK) ”. In FIG. 6, the clearance “e _S / 2” between the outer peripheral surface of the axial force member 10 and the inner peripheral surface of the stiffening tube 20 and the clearance between the outer peripheral surface of the stiffening tube 20 and the inner peripheral surface of the socket tube 50. “E _S / 2” is illustrated. The plate thickness at one end face 50a (tip) in the longitudinal direction of the socket tube 50 is referred to as “t _K (TEK)”.

 

(Comparison material)
Below, the test body used for the loading test for confirming the performance of the conventional brace material as a comparison material is demonstrated. The test body is the conventional brace material 900 shown in FIG. 5, and is a cross-sectional view in side view that defines the length of each part. Table 2 shows dimensions and the like of each part of the comparative material (No. 3).

In FIG. 5, regarding the brace material 900 which is the comparative material (No. 3), the outer diameter of the axial force member 910 is “D _S ”, the outer diameter of the stiffening tube 920 is “D _B ”, and The plate thickness is referred to as “t _B ”, respectively. The yield point of the axial force member 910 is referred to as “σ _y ”, and the product of the cross-sectional area of the axial force member 10 and the yield point σ _y is referred to as “N _y ”. Integral clevises 940 and 960 ( internal threads 941 and 961 are formed) are installed at the ends 911a and 911b (in which male threads 912a and 912b are formed) of the axial force member 910, respectively. The distance between the center of the connection hole 944 of the body clevis 940 and the center of the connection hole 966 of the other integrated clevis 960 is referred to as “l”. One end 911a of the axial force member 910 (male thread 912a is formed) and one end 921a of the stiffening tube 920 (female thread 922a is formed) are a base 930 (female thread 931). , A male screw 932 is formed). A cylindrical sleeve 970 is installed at a position close to the other end portion 911b of the axial force member 910. The sleeve 970 is located within the stiffening tube 920 by a distance “L” from the other end surface 920b of the stiffening tube 920. Is invading. The difference between the outer diameter of the sleeve 970 and the inner surface 922b at the other end 921b of the stiffening tube 920 is referred to as “e _S / 2 (Es / 2)”.

(Secondary moment of section)
From the above, the test specimen No. The inner diameter of the socket tube 50 in the two is determined from the difference e _k of the inner diameter of the outer diameter and the socket pipe 50 of the stiffening tube 20 to the outer diameter D _B of the stiffening tube 20, from the values in Table 1, " 114.3 + 4.0 = 18.3 (mm) ”. The outer diameter of the socket tube 50 is determined from the thickness t _K at the end face 50a of the inner diameter and the socket pipe 50 of the socket pipe 50 with the smallest portion of the outer diameter, from the values in Table 1, "118.3 + 2 × 12 = 142.3 (mm) ". Therefore, the sectional moment of inertia of the socket tube 50 is at least “1.0 × 10 ⁷ (mm ⁴ )” or more at the smallest portion.

On the other hand, test specimen No. which is a comparative material. 3, the sleeve 970 has an inner diameter of “46.0 (mm)” and an outer diameter of “114.3-2 × 25 = 64.3 (mm)”. The cross-sectional secondary moment of the sleeve 970 is at most “0.062 × 10 ⁷ (mm ⁴ )” or less.

The cross-sectional secondary moment of the socket tube 50 of Embodiment 1 has a high (large) value that is about 17 times the cross-sectional secondary moment of the conventional sleeve 970 that is a comparative material. That is, the brace material 100 according to the first embodiment suppresses deformation of the axial force member 10 by the socket tube 50 having higher rigidity than the sleeve 970 provided in the brace material 900.

(Load test)
FIG. 7 is a load-strain diagram showing the result of a loading test for confirming the performance of the brace material 100 according to the first embodiment of the present invention. As a result of No. 1, (b) shows the test specimen No. The result of 2. The loading test is a double swing loading in which compression and tension of the brace material 100 are alternately and repeatedly applied.

7 (a), first, the brace material 100 is compressed by 0.25%. That is, the distance l (el) between the center of the mounting hole 44a of the clevis 40a and the center of the mounting hole 44b of the clevis 40b is reduced by 6.25 mm. At this time, the compressive load and the compressive strain are shown in the first quadrant of the graph of FIG. Next, the axial force member 10 is pulled by 0.25%. That is, the distance l (el) is increased by 6.25 mm. At this time, the tensile load and the tensile strain are shown in the third quadrant of the graph of FIG.

Further, the brace material 100 is compressed by 0.5% (distance l (el) is reduced by 12.5 mm), and then the brace material 100 is pulled by 0.5% (distance l (el) is 12.5 mm). Only stretch). Further, the brace material 100 is compressed by 1.0% (distance l (el) is reduced by 25 mm), and then the brace material 100 is pulled by 1.0% (distance l (el) is extended by 25 mm). Is repeated 5 times.

Then, as a final cycle, the brace material 100 is compressed by 2.0% (distance l (el) is reduced by 50 mm), and then the brace material 100 is pulled by 2.0% (distance l (el) is 50 mm). This is repeated until the brace material 100 buckles or breaks.

When the loading test is performed in the above cycle, the specimen No. In No. 1, the final cycle was repeated three times, and the axial force member 10 was broken during the fourth final cycle.

In FIG. No. 2 is a specimen No. Similarly to 1, the final cycle was repeated three times, and the axial force member 10 was broken at the time of the fourth final cycle.
That is, the test specimen No. 1 and Specimen No. 1 In both cases, since the brace material 100 is not buckled, it is indicated that the deflection of the axial force member 10 is appropriately restrained by the stiffening tube 20 and the socket tube 50.

FIG. 8 is a load-strain diagram showing the results of a loading test for confirming the performance of a conventional brace material as a comparative material. The loading conditions are as follows. 1, no. Same as 2. In FIG. 3, 1 cycle of 0.10% compression and tension, 2 cycles of 0.25% compression and tension, and 1.0% compression after 2 cycles of 0.5% compression and tension When the brace material 900 is bent, the brace material 900 is buckled.

Specimen No. above 1-No. 3 also shows that the configuration using the socket tube 50 of the brace material 100 according to the first embodiment has a higher bending strength (larger) than the configuration of the brace material 900 using the conventional sleeve 970. Therefore, it has been confirmed that it is difficult to buckle.

[Embodiment 2]
The second embodiment is different from the first embodiment in that the joining position of the socket tube 50 is changed from the sliding side base 60 to the stiffening tube 20. In the second embodiment, a description will be given centering on a changing unit with respect to the first embodiment.

FIG. 9 is a view showing a cross section passing through the central axis of the brace material 200 according to Embodiment 2 of the present invention, and is a view for explaining the structure around the socket tube. The same reference numerals are given to the same or corresponding parts as those in the first embodiment, and a part of the description will be omitted. The relative size and thickness of each member are not limited to the illustrated dimensions. The structure on the fixed side cap 30 side not shown is the same as that of the first embodiment.

In the brace material 100 according to the first embodiment, the sliding-side end portion 21b of the stiffening tube 20 is disposed at a distance A from the sliding-side base 60, and the inside is a socket tube 50 having a cylindrical shape. The outer periphery is surrounded. The end of the socket tube 50 on the sliding side base 60 side is detachably joined to a socket pipe threaded male screw portion 64 on the outer periphery of the sliding side base 60 by screw joining.

On the other hand, the brace material 200 of the second embodiment shown in FIG. 9 has a male screw on the outer periphery of the sliding side end 221b of the stiffening tube 220 arranged at a distance A1 from the sliding side base 260. 224 is provided. Then, a female screw 254 provided in the through hole 251 of the socket tube 250 is screwed into the male screw 224 so as to surround the outer periphery of the stiffening tube 220. An end of the socket tube 250 on the sliding side base 260 side surrounds the outer periphery of the sliding side base 260. In the second embodiment, the through hole 251 is larger than the sliding side base 260. The socket tube 250 can be attached from the sliding side base 260 side after the sliding side base 260 and the axial force member 10 are joined. The through hole 251 is larger than the clevis 240b, and the socket tube 250 can be attached even after the clevis 240b is joined to the sliding side base 260.

The outer peripheral surface of the sliding side base 260 and the through hole 251 of the socket tube 250 are fitted with a gap B1. The through hole 251 surrounds the outer periphery of the sliding side base 260 over a length C1 in the longitudinal direction. The clearance B1 and the length C1 are the assembly accuracy of the brace material 200, the accuracy of each part such as the stiffening tube 220, the fixed side base 30, the axial force member 10, the sliding side base 260, and the socket tube 250, and the axial force member 10. It is determined as appropriate according to the allowable amount of deflection.

(Operational effect of the brace material 200 of the second embodiment)
In the brace material 200 of the second embodiment, the joint location of the socket tube 250 is changed. However, the stiffening tube 220 within a predetermined range from the sliding side end 221 b is surrounded by the through hole 251 of the socket tube 250. ing. Since the socket tube 250 surrounds the outer periphery of the stiffening tube 220 and its thickness is not limited, the outer diameter and the plate thickness are increased in the same manner as the brace material 100 according to the first embodiment. be able to. Therefore, as with the brace material 100 according to the first embodiment, the brace material 200 with high bending strength is obtained.

The socket tube 250 and the stiffening tube 220 are detachably joined. Thereby, like the brace material 100 according to the first embodiment, the brace material 200 can be easily assembled at the time of manufacture, the dimensional management of the distance A1 at the time of manufacture is easy, and the deformation performance of the brace material 200 is eventually achieved. Management becomes easier. Further, similarly to the brace material 100 according to the first embodiment, it is possible to directly recognize the damage state of the axial force member 10 in a state where the brace material 200 is attached to the building structure.

As with the brace material 100 according to the first embodiment, both ends of the axial force member 10 in the brace material 200 are joined to the fixed side base 30 and the sliding side base 260 by screws, respectively. By making each screw in the opposite direction, the distance between the mounting holes at both ends of the brace material 200 can be adjusted, and the installation of the brace material 200 to the building structure is facilitated.

The axial force member 10 is the same as the brace member 100 according to the first embodiment with respect to the peripheral structure screwed with the fixed base 30 and the sliding base 260. Therefore, even if bending deformation occurs around the male screw 11 provided on the axial force member 10, the bending deformation around the male screw 11 of the axial force member 10 can be restrained by the support portion 262. The proof stress of the axial force member 10 can be improved.

The sliding base 260 is joined with a distance A1 from the end face of the sliding end 221b of the stiffening tube 220 to the surface of the sliding base 260 facing the end face. Thereby, similarly to the brace material 100 according to the first embodiment, even if a force from the building structure is applied to the brace material 200, no force (axial force) is applied in the axial direction of the stiffening tube 220. With this structure, it is not necessary to increase the strength of the stiffening tube 220, so the cost of the stiffening tube 220 can be reduced.

By making the clevis 40 separate from the fixed side cap 30 and the sliding side cap 60 and joining them later, the clevis 40 can be shared and the cost can be reduced. Corresponding to each building structure, the joining element (clevis 40) can be replaced.

The assembly of the brace material 200 can be performed in the same manner as the brace material 100 according to the first embodiment. Therefore, the dimension (distance A1) between the sliding side end 221b of the stiffening tube 220 and the sliding side base 260 is visible. Therefore, the dimension management of the distance A1 with higher accuracy is possible, and the deformation performance of the brace material 200 can be managed as designed.

Also in Embodiment 2, each joint portion of the brace material 200 is joined by a screw, but it may be joined by other means in addition to the screw. However, the joint portion between the socket tube 250 and the stiffening tube 220 needs to be joined by a detachable joining method even after the brace material 200 is completed. For example, the socket tube 50 may be fixed to the stiffening tube 220 using a set screw from the side.

According to the present invention, a brace material having a simple structure and high bending strength (large) can be obtained, and it can be applied to axial force materials having various shapes of cross-sectional shapes. Various brace materials that can be used can be widely used.

10 axial force material, 11a (one) end, 11b (other) end, 12a male thread, 12b male thread, 13a male thread part, 13b male thread part, 20 stiffening tube, 20b (other) end face 21a fixed side end, 21b sliding side end, 22a male screw, 30 fixed side cap, 30b end face, 31 hole, 32 support part, 33 female screw, 34 stiffening tube threaded female screw part, 35 taper part , 36 Chamfered part, 37 Clevis screwed female thread part, 40 Clevis, 40a Clevis (on the fixed side base side), 40b Clevis (on the sliding side base side), 41 Disc-shaped part, 42 Plate-shaped part, 43 Male Screw, 44 mounting hole, 44a mounting hole, 44b mounting hole, 50 socket tube, 50a end face, 51 through hole, 52 taper part, 54 sliding side screw threaded female screw, 55 cylindrical part, 57 tip, 60 Sliding side base, 61 holes, 62 Support part, 63 female thread, 64 socket pipe threaded male thread part, 66 chamfered part, 67 clevis threaded female thread part, 100 brace material, 101 central shaft, 200 brace material, 220 stiffening tube, 221b sliding side End part, 224 male thread, 240b clevis, 250 socket tube, 251 through hole, 254 female thread, 260 sliding side cap, 262 support part, 263 female thread, 267 clevis threaded female thread part, 900 brace material (comparative material) ), 910 Axial force material, 911a end, 911b end, 912a male thread, 912b male thread, 920 stiffening tube, 920b end surface, 921a end, 921b end, 922a female thread, 922b inner surface, 931 female thread, 932 Male thread, 940 Integrated clevis, 941 Female thread, 944 Connection hole, 960 Integrated clevis, 961 Female thread, 966 Connection hole 970 sleeve, A distance, A1 distance, A2 distance, B clearance, B1 gap, C length, _{D S} outer diameter, _{D B} outer diameter (inner diameter) _{e k} difference (internal diameter) _{e S} differences, _{N y} The product of the cross-sectional area of the axial force member 10 and the yield point σ _y , l distance, l _B distance, _F l _J distance, t _B plate thickness, t _K plate thickness, σ _y yield point.

Claims (8)

1. A rod-shaped axial force material,
   A stiffening tube through which the axial force member penetrates,
   A fixed base that is bonded to one end in the longitudinal direction of the stiffening tube and is bonded to one end in the longitudinal direction of the axial force member;
   A sliding side base joined to the other end in the longitudinal direction of the axial force member;
   A socket tube detachably joined to the sliding side end which is the other end in the longitudinal direction of the stiffening tube or the sliding side base,
   The fixed side base and the sliding side base are:
   It has a joining element that becomes a joint for installation in a building structure,
   The socket tube is
   A brace material surrounding an outer peripheral portion of the sliding side end portion and an outer peripheral portion of the sliding side base.
2. The socket tube and the stiffening tube or the sliding side base are:
   The brace material according to claim 1, wherein the brace material is screwed.
3. The axial force material is
   Have male threads at both ends,
   The fixed side base and the sliding side base are:
   A hole into which the axial force member is inserted;
   The hole
   A cylindrical portion;
   A female screw on which the axial force member is screwed, on the back side of the cylindrical portion when viewed from the direction in which the axial force member is inserted,
   The axial force member, the fixed side base and the sliding side base are:
   The brace material according to claim 1 or 2 joined by screwing of said male screw and said female screw.
4. The sliding side base is
   The joint according to claim 1, wherein the axial force member is joined so that there is a gap between an end surface of the sliding side end portion of the stiffening tube and a surface of the sliding side base facing the end surface. The brace material according to any one of the above.
5. The joining element is
   5. The method according to claim 1, wherein the axial force member and the stiffening pipe protrude in a direction opposite to a side where the axial force member and the stiffening pipe are joined, and are joined to the fixed side base and the sliding side base, respectively. The brace material described.
6. The inner diameter of the socket tube surrounding the stiffening tube is:
   Constant in the longitudinal direction,
   The outer diameter of the range is
   The brace material according to any one of claims 1 to 5, wherein the brace material decreases as it approaches the center in the longitudinal direction of the stiffening tube.
7. A rod-shaped axial force material,
   A stiffening tube through which the axial force member penetrates,
   A fixed base that is bonded to one end in the longitudinal direction of the stiffening tube and is bonded to one end in the longitudinal direction of the axial force member;
   A sliding side base joined to the other end in the longitudinal direction of the axial force member;
   A socket tube detachably joined to the sliding side end which is the other end in the longitudinal direction of the stiffening tube or the sliding side base,
   The fixed side base and the sliding side base are:
   It has a joining element that becomes a joint for installation in a building structure,
   The socket tube is
   A method for assembling a brace material surrounding an outer peripheral portion of the sliding side end portion and an outer peripheral portion of the sliding side base,
   A fixed side base joining step for joining the fixed side base and the axial force member;
   A stiffening tube fixing step of joining the fixed side cap and the stiffening tube;
   A socket tube fitting step of passing the socket tube through an outer peripheral portion of the sliding side end portion of the stiffening tube, a sliding side cap fixing step of joining the sliding side cap and the axial force member,
   A socket pipe joining step of joining the socket pipe to the stiffening pipe or the sliding side cap,
   The socket pipe joining step includes
   A method for assembling a brace material, which is performed after the fixed side base joining step, the stiffening tube fixing step, the socket pipe fitting step, and the sliding side base fixing step.
8. The sliding side cap fixing step includes
   A gap adjustment step from the end surface of the sliding side end portion of the stiffening tube to the surface of the sliding side cap facing the end surface, which is performed after the fixing side base joining step and the stiffening tube fixing step. The method for assembling a brace material according to claim 7.

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