Joint structure

Abstract

To provide a joint structure allowing a reinforcement member to be easily attached to a steel pipe member for an existing structure.SOLUTION: A joint structure of the present invention is a joint structure 1 to join a reinforcement member BD to a steel pipe member SP of an existing structure, being provided with: a joint member 2 joined to the steel pipe member SP so as to cover the outer periphery of the steel pipe member SP, to which the reinforce member BD is joined; and a shear force resistance member 3 joined to the steel pipe member SP so as to cover the outer periphery of the steel pipe member SP, wherein the shear force resistance member 3 is placed so as to directly or indirectly abut the joint member 2 in a longitudinal direction LD of the steel pipe member SP.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a joining structure.

Background Art

[0002] For example, as disclosed in Patent Documents 1 and 2, in order to reinforce an existing structure composed of steel pipe members, a reinforcing member such as a brace is joined to the steel pipe member through a joining structure. The joining structure needs to join the reinforcing member to the steel pipe member so that relative movement between the steel pipe member and the reinforcing member is suppressed because the reinforcing member resists the force generated in the steel pipe member or absorbs the force generated in the steel pipe member.

[0003] As a member constituting such a joining structure, for example, Patent Document 1 discloses a pair of reinforcing member fixtures that are joined so as to sandwich a steel pipe member and to which a brace is joined. The pair of reinforcing member fixtures are joined to the steel pipe member by fixing the respective connecting flanges to each other with bolts and adhesively fixing the respective split cylindrical bodies to the steel pipe member with an adhesive. The pair of reinforcing member fixtures can resist the longitudinal shear force of the steel pipe member received from the brace by the adhesive that adhesively fixes the split cylindrical body and the steel pipe member, thereby suppressing relative movement between the steel pipe member and the brace.

[0004] Further, Patent Document 2 discloses a pair of joining members that are fixed so as to sandwich a steel pipe member and to which a brace is fixed as a member constituting a joining structure. The pair of joining members are joined to the steel pipe member by fixing the respective flanges to each other with bolts and fixing the respective clamping portions to the steel pipe member with through bolts that penetrate each of them. The pair of joining members can resist the longitudinal shear force of the steel pipe member received from the brace by the through bolts that fix the clamping portion and the steel pipe member, thereby suppressing relative movement between the steel pipe member and the brace.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Japanese Patent Publication No. 2009-102877 [Patent Document 2] Japanese Patent Publication No. 2020-59968 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] However, as described in Patent Document 1, even if an adhesive is used to join a pair of reinforcing member attachments to a steel pipe member, the adhesive has extremely weak resistance to tensile force perpendicular to the longitudinal direction of the steel pipe member received from the brace. Therefore, when the steel pipe member receives tensile force perpendicular to the longitudinal direction from the brace, there is a possibility that the pair of reinforcing member attachments and the steel pipe member may detach, and the expected resistance to longitudinal shear force received from the brace cannot be maintained. Furthermore, as described in Patent Document 2, if through bolts are used to join a pair of joining members to a steel pipe member, it is necessary to create bolt holes for the through bolts in the existing steel pipe member. Creating bolt holes at the construction site is a complicated process, and not only is it difficult to determine the location of the bolt holes, but creating the bolt holes also reduces the strength of the steel pipe member. Moreover, if the position of the joining members is to be changed once they have been positioned, it is necessary to create new bolt holes, which makes the work even more complicated and further reduces the strength of the steel pipe member.

[0007] This invention has been made in view of the above problems, and aims to provide a joining structure that allows reinforcing members to be firmly and easily joined to steel pipe members in existing structures. [Means for solving the problem]

[0008] The present invention provides a joining structure for joining a reinforcing member to a steel pipe member of an existing structure, comprising: a joining member that is joined to the steel pipe member so as to cover the outer circumference of the steel pipe member and to which the reinforcing member is joined; and a shear force resistance member that is joined to the steel pipe member so as to cover the outer circumference of the steel pipe member, wherein the shear force resistance member is arranged to directly or indirectly abut the joining member in the longitudinal direction of the steel pipe member.

[0009] Furthermore, it is preferable that the shear force resistance member is joined to the steel pipe member on both sides in the longitudinal direction, with the joining member in between.

[0010] Furthermore, it is preferable that the pair of shear force resistance members, which are joined to the steel pipe member on both sides in the longitudinal direction with the joining member in between, are connected to each other by connecting bolts extending in the longitudinal direction, such that relative movement between them in the direction of moving apart in the longitudinal direction is suppressed.

[0011] Furthermore, the shear force resistance member comprises at least two resistance clamping members that clamp the steel pipe member in a direction substantially perpendicular to the longitudinal direction of the steel pipe member and are fixed to each other, wherein the resistance clamping member comprises a partially cylindrical resistance clamping portion that directly or indirectly contacts the outer surface of the steel pipe member, and a resistance flange portion that extends radially outward from the circumferential end of the resistance clamping portion, wherein the resistance clamping portion of each of the at least two resistance clamping members directly or indirectly contacts the outer surface of the steel pipe member Preferably, the resistance clamping members are arranged to contact the target, but before being fixed to each other, a gap is created between the opposing resistance flange portions of adjacent resistance clamping members in the circumferential direction of the steel pipe member, and the at least two resistance clamping members are joined to the steel pipe member by clamping bolts that extend in the direction in which the resistance flange portions face each other, so as to clamp the steel pipe member in a direction substantially perpendicular to the longitudinal direction and apply a compressive force to the steel pipe member.

[0012] Furthermore, it is preferable that the shear force resistance member is joined to the steel pipe member via an adhesive.

[0013] Furthermore, the joining member comprises at least two joining clamping members that clamp the steel pipe member in a direction substantially perpendicular to the longitudinal direction of the steel pipe member and are fixed to each other, and the joining clamping member comprises a partially cylindrical joining clamping portion that directly or indirectly abuts the outer surface of the steel pipe member, and a joining flange portion that extends radially outward from the circumferential end of the joining clamping portion, and the at least two joining clamping members are joined to the steel pipe member by fixing members that extend in the direction in which the joining flange portions of adjacent joining clamping members in the circumferential direction of the steel pipe member are fixed to each other, and it is preferable that the fixing members for the at least two joining clamping members are arranged radially adjacent to the steel pipe member so that the gap between the respective joining flange portions of adjacent joining clamping members in the circumferential direction of the steel pipe member does not widen due to the force received from the reinforcing member.

[0014] Furthermore, it is preferable that the joining member is provided with a rib plate extending substantially perpendicular to the longitudinal direction and on the side opposite to the steel pipe member.

[0015] Furthermore, it is preferable that the surface roughness of the surface at the joint of the steel pipe member to which the shear force resistance member is joined is greater than the surface roughness of the surface at the joint of the steel pipe member to which the joining member is joined. [Effects of the Invention]

[0016] According to the present invention, it is possible to provide a joining structure that allows reinforcing members to be easily joined to steel pipe members in existing structures. [Brief explanation of the drawing]

[0017] [Figure 1] This is a front view of a joint structure according to the first embodiment of the present invention. [Figure 2] Figure 1 is a side view of the joint structure. [Figure 3] It is a cross-sectional view taken along line III-III of the joint structure in FIG. 1. [Figure 4] It is a cross-sectional view taken along line IV-IV of the joint structure in FIG. 1. [Figure 5] It is a cross-sectional view showing the states before and after joining between the shear force resistance member and the steel pipe member in the joint structure of FIG. 1, where (a) shows the state before joining and (b) shows the state after joining. [Figure 6] It is a front view showing the joint member and the shear force resistance member in the joint structure of FIG. 1 with imaginary lines. [Figure 7] It is a front view of the joint structure according to the second embodiment of the present invention. [Figure 8] It is a cross-sectional view taken along line VIII-VIII of the joint structure in FIG. 7. [Figure 9] It is a front view of the joint structure according to the third embodiment of the present invention. [Figure 10] It is a side view of the joint structure in FIG. 9. [Figure 11] It is a cross-sectional view taken along line XI-XI of the joint structure in FIG. 9. [Figure 12] It is a cross-sectional view taken along line XII-XII of the joint structure in FIG. 9. [Figure 13] It is a front view of the joint structure according to the fourth embodiment of the present invention. [Figure 14] It is a perspective view of the joint structure in FIG. 13. [Figure 15] It is a cross-sectional view taken along line XV-XV of the joint structure in FIG. 13.

Embodiments for Carrying out the Invention

[0018] The following describes four embodiments of the joint structure of the present invention with reference to the attached drawings. However, the embodiments shown below are merely examples, and the joint structure of the present invention is not limited to these examples. Figures 1 to 6 are diagrams relating to the joint structure 1 according to the first embodiment, Figures 7 to 8 are diagrams relating to the joint structure 1 according to the second embodiment, Figures 9 to 12 are diagrams relating to the joint structure 1 according to the third embodiment, and Figures 13 to 15 are diagrams relating to the joint structure 1 according to the fourth embodiment. In the following, the configurations common to all embodiments will be described together, and the configurations that differ in each embodiment will be added as appropriate. In the following description, "this embodiment" refers to all embodiments. In all figures, the same reference numerals are used for elements that have a common function in the joint structure of each embodiment.

[0019] The joining structure 1 of this embodiment is used to join reinforcing members BD and HS to a steel pipe member SP of an existing structure, as shown in Figures 1-2, 7, 9-10, and 13. The existing structure to which the joining structure 1 is applied is not particularly limited as long as it is an existing structure that is at least partially composed of a steel pipe member SP, for example, an existing steel pipe truss structure is an example. The steel pipe member SP to which the reinforcing members BD and HS are joined is not particularly limited as long as it is a cylindrical member made of steel, and may be a rectangular tube or other cylindrical shape in addition to the cylindrical shape shown (see also Figures 3-4, 8, 11-12, and 14), and its constituent material may be carbon steel or stainless steel.

[0020] The reinforcing members BD and HS, which are joined to the steel pipe member SP by the joining structure 1, are members that reinforce the existing structure by being joined to the steel pipe member SP. The reinforcing members BD and HS absorb the vibration energy generated in the steel pipe member SP when the existing structure is subjected to disturbances such as seismic motion and wind, and / or resist the external force received from the steel pipe member SP, thereby suppressing the deformation of the existing structure and improving the strength of the existing structure, thereby improving the seismic resistance and vibration damping of the existing structure. The reinforcing members BD and HS are not particularly limited as long as they can be joined to the steel pipe member SP and reinforce the existing structure. Examples include braces joined to the steel pipe member SP by the joining structure 1 of the first and second embodiments shown in Figures 1 and 7, and H-shaped steels joined to the steel pipe member SP by the joining structure 1 of the third and fourth embodiments shown in Figures 9 and 13.

[0021] As shown in Figures 1-2, 7, 9-10, and 13-14, the joint structure 1 includes a joint member 2 that is joined to the steel pipe member SP so as to cover the outer circumference of the steel pipe member SP, to which reinforcing members BD and HS are joined, and a shear force resistance member 3 that is joined to the steel pipe member SP so as to cover the outer circumference of the steel pipe member SP.

[0022] As shown in Figures 1, 7, 9, and 13, the joining member 2 is joined to the steel pipe member SP, and also joins the reinforcing members BD and HS to the steel pipe member SP. The joining member 2 is joined to the steel pipe member SP so as to cover its outer circumference, and engages with the steel pipe member SP in a direction perpendicular to the longitudinal direction LD of the steel pipe member SP, thereby suppressing relative movement of the steel pipe member SP in the direction perpendicular to the longitudinal direction LD. Furthermore, because the joining member 2 is joined to the steel pipe member SP so as to cover its outer circumference, the frictional force (and possibly adhesive force) generated between the joining member 2 and the steel pipe member SP suppresses relative movement of the steel pipe member SP in the longitudinal direction LD. As a result, the reinforcing members BD and HS joined to the joining member 2 have their relative movement with respect to the steel pipe member SP in the longitudinal direction LD and in the direction perpendicular to the longitudinal direction LD suppressed, thereby suppressing the loss of force transmission between them and the steel pipe member SP, and providing a reinforcing effect to the existing structure. However, the joining member 2 only needs to engage with the steel pipe member SP in the direction perpendicular to the longitudinal direction LD of the steel pipe member SP, thereby suppressing its relative movement with respect to the steel pipe member SP in the direction perpendicular to the longitudinal direction LD. As will be described in detail below, the relative movement of the steel pipe member SP in the longitudinal direction LD of the steel pipe member SP is suppressed by the shear force resistance member 3, so it is not necessarily required that the joining member 2 generate frictional force (and possibly adhesive force) between the joining member 2 and the steel pipe member SP to suppress the relative movement of the steel pipe member SP in the longitudinal direction LD.

[0023] In the first to third embodiments, as shown in Figures 3, 8, and 11, the joining member 2 is joined to the steel pipe member SP by directly contacting the outer surface of the steel pipe member SP over substantially the entire circumference of the circumferential CD of the outer circumference of the steel pipe member SP, thereby covering substantially the entire circumference of the circumferential CD of the outer circumference of the steel pipe member SP. By joining the steel pipe member SP by covering substantially the entire circumference of the circumferential CD of the outer circumference of the steel pipe member SP, the engagement force between the joining member 2 and the steel pipe member SP in the direction perpendicular to the longitudinal direction LD becomes larger, and the frictional force between the joining member 2 and the steel pipe member SP also becomes larger. As a result, the relative movement between the joining member 2 and the steel pipe member SP in the longitudinal direction LD and in the direction perpendicular to the longitudinal direction LD is further suppressed, and consequently, the relative movement between the reinforcing members BD, HS and the steel pipe member SP is further suppressed. However, the joining member 2 is not limited to this embodiment as long as it covers the outer circumference of the steel pipe member SP and is joined to the steel pipe member SP in such a way that relative movement of the steel pipe member SP in the longitudinal direction LD and in the direction perpendicular to the longitudinal direction LD is suppressed. For example, it may be joined to the steel pipe member SP so as to cover a part of the circumferential direction CD of the outer circumference of the steel pipe member SP, or it may be joined to the steel pipe member SP by covering the outer circumference of the steel pipe member SP by indirectly contacting the surface of the steel pipe member SP via another material such as a rubber material that increases frictional force. In the fourth embodiment, as shown in Figures 13 to 15, the joining member 2 is joined to the steel pipe member SP so as to cover the entire circumference of the circumferential direction CD of the outer circumference of the steel pipe member SP, with the joining flange portion 21d (described later) directly contacting the surface of the outer circumference of the steel pipe member SP, and the joining clamping portion 21a (described later) indirectly contacting the surface of the outer circumference of the steel pipe member SP via the filler material 25. However, in the fourth embodiment as well, the joining member 2 may be joined to the steel pipe member SP such that it covers a portion of the circumferential CD on the outer circumference of the steel pipe member SP.

[0024] The joining member 2 only needs to be joined to the steel pipe member SP so as to partially cover the outer circumference of the steel pipe member SP, in order to suppress relative movement of the steel pipe member SP in the longitudinal direction LD and in the direction perpendicular to the longitudinal direction LD, and its configuration is not particularly limited. In this embodiment, as shown in Figures 1-3, 7-8, 9-11 and 13-14, the joining member 2 includes a pair of joining clamping members 21, 21 that clamp the steel pipe member SP in a direction substantially perpendicular to the longitudinal direction LD of the steel pipe member SP (clamping direction SD1 in this embodiment) and are fixed to each other. The pair of joining clamping members 21, 21 are fixed to each other while clamping the steel pipe member SP in the clamping direction SD1, thereby joining the steel pipe member SP so as to cover substantially the entire circumference of the outer circumference CD of the steel pipe member SP. The pair of joining clamping members 21, 21 cover almost the entire circumference of the circumferential direction CD of the outer circumference of the steel pipe member SP, thereby increasing the engagement force between the pair of joining clamping members 21, 21 and the steel pipe member SP in the direction perpendicular to the longitudinal direction LD, and also increasing the frictional force (and possibly adhesive force) between the pair of joining clamping members 21, 21 and the outer surface of the steel pipe member SP. As a result, the relative movement of the pair of joining clamping members 21, 21 with respect to the steel pipe member SP in the longitudinal direction LD and in the direction perpendicular to the longitudinal direction LD is further suppressed. In this embodiment, the joining member 2 comprises a pair (two) of joining clamping members 21, 21, but is not limited to this embodiment as long as at least two joining clamping members are provided to clamp the steel pipe member SP in a direction substantially perpendicular to the longitudinal direction LD, not limited to the clamping direction SD1, for example, there may be three or more joining clamping members arranged in a line along the circumferential direction CD of the steel pipe member SP.

[0025] The joining clamping member 21 is not particularly limited in its constituent material, as long as it supports at least the reinforcing members BD and HS and has sufficient strength to suppress deformation due to forces received from the steel pipe member SP and the reinforcing members BD and HS. For example, it can be formed from a known steel plate.

[0026] In this embodiment, the joining clamping member 21, as shown in Figures 1-3, 7-8, 9-11, and 13-15, comprises a partially cylindrical joining clamping portion 21a that directly or indirectly contacts the outer surface of the steel pipe member SP, and a joining flange portion 21b that extends radially outward from the end of the joining clamping portion 21a in the circumferential direction CD. At least two (a pair in this embodiment) joining clamping members 21, 21 are joined to the steel pipe member SP by fixing the opposing joining flange portions 21b, 21b of adjacent joining clamping members 21, 21 in the circumferential direction CD of the steel pipe member SP to each other by fixing members (clamping bolts 22 and / or connecting members 24, described later) that extend in the direction in which the joining flange portions 21b, 21b face each other. In the fourth embodiment, the joining clamping member 21 is further provided with joining flanges 21d that extend substantially perpendicular to the longitudinal direction LD from the inside to the outside of the radial direction of the joining clamping member 21a, over substantially the entire circumferential direction CD of the joining clamping member 21a, on both sides of the joining clamping member 21a in the longitudinal direction LD. When the joining clamping member 21 is joined to the steel pipe member SP, the joining flanges 21d contact the outer surface of the steel pipe member SP, and a space is formed in which the filler material 25 is filled in the region surrounded by the joining clamping member 21a, the joining flanges 21d, and the outer surface of the steel pipe member SP (see Figure 15). The filler material 25 is not particularly limited as long as it is a material that can deform to follow the shape of the surrounding space when placed in the above-mentioned space and hardens after placement, and known grout or adhesives can be used, and grout can be suitably used from the viewpoint of cost. The filler material 25 is injected through the injection hole H provided in the joint clamping portion 21a after the joint clamping member 21 is attached to the steel pipe member SP.

[0027] The joining clamping portion 21a is a portion that directly or indirectly contacts the outer surface of the steel pipe member SP and covers a portion of the circumferential direction CD of the outer surface of the steel pipe member SP. By directly or indirectly contacting the outer surface of the steel pipe member SP, the joining clamping portion 21a generates an engagement force with the steel pipe member SP in a direction perpendicular to the longitudinal direction LD of the steel pipe member SP, and also generates a frictional force with the outer surface of the steel pipe member SP. In the first to third embodiments, the joining clamping portion 21a is arranged to directly contact the outer surface of the steel pipe member SP, as shown in Figures 3, 8, and 11. However, the joining clamping portion 21a is not limited to the illustrated examples, as long as it contacts the outer surface of the steel pipe member SP in such a way that an engagement force is generated with the steel pipe member SP in a direction perpendicular to the longitudinal direction LD and a frictional force is generated with the outer surface of the steel pipe member SP. It may also be arranged to indirectly contact the steel pipe member SP via another material, such as a rubber material that increases the frictional force. Furthermore, in the fourth embodiment, the joining clamping portion 21a indirectly contacts the outer surface of the steel pipe member SP via the filler material 25, as shown in Figure 15. By interposing the filler material 25 between the joining clamping portion 21a and the outer surface of the steel pipe member SP, even if there are irregularities on the outer surface of the steel pipe member SP, the formation of a gap between the joining clamping portion 21a and the outer surface of the steel pipe member SP is suppressed. As a result, the joining clamping portion 21a engages with the steel pipe member SP more reliably in a direction perpendicular to the longitudinal direction LD of the steel pipe member SP, and relative movement of the steel pipe member SP in the direction perpendicular to the longitudinal direction LD is suppressed.

[0028] The joining clamping portion 21a only needs to be able to directly or indirectly contact the outer surface of the steel pipe member SP, and its shape and size are not particularly limited. For example, in the first to third embodiments, the joining clamping portion 21a is formed to have a shape and size that corresponds to the shape and size of the outer surface of the steel pipe member SP. More specifically, as shown in Figures 1 to 3, 7 to 8, and 9 to 11, the joining clamping portion 21a is formed in a substantially half-cylindrical shape to correspond to the outer shape of the substantially cylindrical steel pipe member SP, and the inner diameter of the joining clamping portion 21a is formed to be substantially the same as the outer diameter of the steel pipe member SP, or slightly larger than the outer diameter of the steel pipe member SP, to correspond to the size of the outer circumference of the steel pipe member SP. For example, in the fourth embodiment, as shown in Figures 13 to 15, the joining clamping portion 21a is formed in a substantially half-cylindrical shape to correspond to the shape of the outer circumference of the substantially cylindrical steel pipe member SP, and the inner diameter of the joining clamping portion 21a is formed to be larger than the outer diameter of the steel pipe member SP so that the filler material 25 can be filled between the joining clamping portion 21a and the outer surface of the steel pipe member SP. In the fourth embodiment, the joining clamping portion 21a only needs to have an inner diameter larger than the outer diameter of the steel pipe member SP so that the filler material 25 can be filled, and is not particularly limited, but it is preferable that it has substantially the same diameter as the resistance clamping portion 31a of the shear force resistance member 3 described later, and is formed and arranged so that they are aligned substantially in the same straight line in a cross section along the longitudinal direction LD (see Figure 15). As a result, when force is transmitted from the joining member 2 to the shear force resistance member 3, deformation of the joining member 2 and the shear force resistance member 3 is suppressed, and the resistance force by the shear force resistance member 3 described later can be increased. In this embodiment, the joining clamping portion 21a is formed in a substantially half-cylindrical shape. However, if the steel pipe member SP is formed in a cylindrical shape other than substantially cylindrical, it may be formed in a substantially half-cylindrical shape corresponding to the shape of the outer circumference of the steel pipe member SP. Furthermore, the joining clamping portion 21a is not limited to a substantially half-cylindrical shape, as long as it can cover a part of the circumferential direction CD of the outer surface of the steel pipe member SP, and may be formed in a partially cylindrical shape such as a 1 / 3 or 2 / 3 cylinder. In addition, the joining clamping portion 21a may be formed to a size such that a gap is created between the joining clamping portions 21a, 21a when the steel pipe member SP is clamped in the clamping direction SD1 together with the other joining clamping portion 21a.

[0029] The joining flange portion 21b is fixed to the joining flange portion 21b of another joining clamping member 21 adjacent to the steel pipe member SP in the circumferential direction CD, thereby fixing adjacent joining clamping members 21, 21 to each other in the circumferential direction CD of the steel pipe member SP. In this embodiment, as shown in Figures 1, 3, 7, 8, 9, 11 and 13, 14, the joining flange portion 21b is formed in a plate shape so as to extend radially outward from each of the ends of the joining clamping portion 21a in the circumferential direction CD, along a direction substantially perpendicular to both the longitudinal direction LD and the clamping direction SD1. Note that as long as the joining flange portion 21b is formed to extend radially outward from the end of the joining clamping portion 21a in the circumferential direction CD, its direction of extension is not limited to a direction substantially perpendicular to both the longitudinal direction LD and the clamping direction SD1, and can be appropriately modified according to the arrangement of the joining flange portion 21b of the other joining clamping member 21 to be fixed.

[0030] Here, the reinforcing members BD and HS that are joined to the joining member 2 only need to be joined to the joining member 2 in such a way as to reinforce the existing structure, and the position and method of joining are not particularly limited. In this embodiment, the reinforcing members BD and HS are joined to the joining flange portion 21b of the joining clamping member 21, as shown in Figures 1-3, 7, 8, 9, 11 and 13.

[0031] In the joint structure 1 of the first and second embodiments, in which the reinforcing member brace BD is joined to the joint member 2, as shown in Figures 3 and 8, the brace BD is joined to the joint member 2 by fixing means such as bolts while a plate-shaped connecting member CM1 fixed to the brace BD is sandwiched between adjacent joint flange portions 21b, 21b. In the first and second embodiments, as shown in Figures 1 and 7, four brace BDs are joined to the joint member 2, and each brace BD is arranged to extend in a direction inclined with respect to the longitudinal direction LD (in the first and second embodiments, in a direction inclined by 45°). One end of each brace BD is joined to the joining flange portions 21b, 21b on both sides (left and right sides in Figures 1 and 7) of the joining flange portion 21b, adjacent to the ends on both sides (up and down sides in Figures 1 and 7) of the joining flange portion 21b in the longitudinal direction LD (left and right directions in Figures 1 and 7), with the joining clamping portion 21a sandwiched between them in a direction perpendicular to both the longitudinal direction LD and the clamping direction SD1. The other end of each brace BD is joined to other members of the existing structure (steel pipe member SP, etc.) via another joining structure (joint structure 1, etc.). However, the number and arrangement of brace BDs can be appropriately modified according to the structure of the existing structure to be reinforced. In addition, the brace BD may be joined to other locations on the joining flange portion 21b, or to other locations on the joining member 2 other than the joining flange portion 21b.

[0032] In the third and fourth embodiments of the joining structure 1, in which the reinforcing member H-shaped steel HS is joined to the joining member 2, as shown in Figures 9, 11, and 13, the web portion of the connecting member CM2, which has a substantially T-shaped cross-section and whose flange portion is fixed to the flange portion of the H-shaped steel HS by welding or the like, is sandwiched between adjacent joining flange portions 21b, 21b and fixed by fixing means such as bolts, thereby joining the H-shaped steel HS to the joining member 2. In the third and fourth embodiments, the H-shaped steel HS is arranged along the longitudinal direction LD so as to extend substantially parallel to the steel pipe member SP, and the flange portion of the H-shaped steel HS is joined via the connecting member CM2 to one side (right side in Figures 9 and 11) of the joining clamping portion 21a which is perpendicular to both the longitudinal direction LD and the clamping direction SD1 (left and right direction in Figures 9 and 11). However, the arrangement of the H-shaped steel HS can be appropriately modified according to the structure of the existing structure to be reinforced. Furthermore, the H-shaped steel HS may be joined to other locations on the joining flange portion 21b, or to other locations on the joining member 2 other than the joining flange portion 21b.

[0033] As described above, at least two (a pair in this embodiment) joining clamping members 21, 21 are fixed to each other by fixing members (clamping bolts 22 and / or connecting members 24) that extend in directions in which the adjacent joining flange portions 21b, 21b are opposed to each other. It is preferable that the fixing members (clamping bolts 22 and / or connecting members 24) for at least two (a pair in this embodiment) joining clamping members 21, 21 are arranged radially adjacent to the steel pipe member SP, as shown in Figures 1, 3, 7, 8, 9, 11 and 13, 14, such that the gap between the respective joining flange portions 21b, 21b of the joining clamping members 21, 21 adjacent to each other in the circumferential direction CD of the steel pipe member SP is suppressed from widening (in the vertical direction in Figures 3, 8, 11, and 14) due to the forces received from the reinforcing members BD, HS. When the joining clamping members 21, 21 are subjected to tensile force from the reinforcing members BD, HS in a direction perpendicular to the longitudinal direction LD (left-right direction in Figures 3 and 8, and rightward direction in Figures 11 and 13), the partially cylindrical joining clamping portions 21a, 21a are subjected to stress that tends to deform them into a flat plate shape, and the joint flange portions 21b, 21b, which are fixed to each other, are subjected to stress that tends to separate them from each other (up and down direction in Figures 3, 8, 11, and 14). If the gap between the joint flange portions 21b, 21b widens due to such stress, a gap may be created between the joining clamping portions 21a, 21a (and the joint flange portions 21d, 21d) and the outer surface of the steel pipe member SP. In this embodiment, the joint flange portions 21b, 21b are fixed to each other by fixing members (clamping bolts 22 and / or connecting members 24) arranged radially adjacent to the steel pipe member SP. This suppresses the widening of the gap between the joint flange portions 21b, 21b, and prevents the formation of gaps between the joint clamping portions 21a, 21a (and joint flange portions 21d, 21d) and the outer surface of the steel pipe member SP.This makes it possible to suppress a decrease in the engagement force between the joining clamping portions 21a, 21a (and joining flange portions 21d, 21d) and the steel pipe member SP in a direction perpendicular to the longitudinal direction LD of the steel pipe member SP, and also suppress a decrease in the frictional force (and possibly adhesive force) between the joining clamping portions 21a, 21a (and joining flange portions 21d, 21d) and the outer surface of the steel pipe member SP.

[0034] The fixing members (clamping bolts 22 and / or connecting members 24) do not need to be particularly limited as long as they are positioned adjacent to the steel pipe member SP in the radial direction of the steel pipe member SP, but are positioned adjacent to the steel pipe member SP such that the end of the fixing member on the steel pipe member SP side is preferably located within a length of 1 / 10 or less of the radial length of the steel pipe member SP from the radial end of the steel pipe member SP, more preferably within a length of 1 / 20 or less of the radial length of the steel pipe member SP from the radial end of the steel pipe member SP, and even more preferably in contact with the joining clamping portion 21a.

[0035] As a fixing member, for example, clamping bolts 22 extending in a direction in which the joining flange portions 21b, 21b face each other can be used, as in the joining structures 1 of the first, third, and fourth embodiments shown in Figures 1-3, 9-11, and 13-14. The clamping bolts 22 extend in a direction in which the joining flange portions 21b, 21b face each other, penetrate the joining flange portions 21b, 21b, and fix the joining flange portions 21b, 21b to each other. In the joining structures 1 of the first, third, and fourth embodiments, the clamping bolts 22 are fixed to the joining flange portion 21b via clamping washers 23 placed on the surface of the joining flange portion 21b, as shown in Figures 1-3, 9-11, and 13-14. By fixing the clamping bolt 22 to the joint flange portion 21b via the clamping washer 23, the area over which the tightening force of the clamping bolt 22 acts can be extended to the area of ​​the clamping washer 23, further suppressing the widening of the gap between the joint flange portions 21b, 21b.

[0036] The clamping bolt 22 is not particularly limited as long as it is positioned adjacent to the steel pipe member SP in the radial direction of the steel pipe member SP, but preferably the axis of the clamping bolt 22 is positioned within a length of 1 / 2 or less of the radial length of the steel pipe member SP from the radial end of the steel pipe member SP, and more preferably within a length of 1 / 3 or less of the radial length of the steel pipe member SP from the radial end of the steel pipe member SP, and positioned adjacent to the steel pipe member SP. The clamping washer 23 is positioned as appropriate depending on the position where the clamping bolt 22 is positioned, but preferably the end of the clamping washer 23 on the steel pipe member SP side is positioned within a length of 1 / 10 or less of the radial length of the steel pipe member SP from the radial end of the steel pipe member SP, more preferably within a length of 1 / 20 or less of the radial length of the steel pipe member SP from the radial end of the steel pipe member SP, and even more preferably in contact with the joint clamping portion 21a, and positioned adjacent to the steel pipe member SP. In this specification, the clamping bolt 22 is shown as being provided on the joining member 2 in the first, third, and fourth embodiments, but it may also be provided on the joining member 2 in the second embodiment, similar to the joining member 2 in the first, third, and fourth embodiments.

[0037] Furthermore, as a fixing member, a connecting member 24 (such as a washer) extending in a direction opposite to the joining flange portions 21b, 21b can also be used, for example, as in the joining structure 1 of the second embodiment shown in Figures 7 and 8. As shown in Figures 7 and 8, the connecting member 24 extends in a direction opposite to the joining flange portions 21b, 21b, penetrates the joining flange portions 21b, 21b, and connects the rib plates 21c, described later, which are provided on the joining flange portions 21b, 21b, to each other, thereby fixing the joining flange portions 21b, 21b to each other. As shown in Figure 7, the connecting member 24 is arranged on both sides of the longitudinal direction LD of the rib plate 21c so as to sandwich the rib plate 21c in the longitudinal direction LD. As shown in Figure 8, one end of the connecting member 24 in the direction of extension (upper side in Figure 8) is fixed to a rib plate 21c provided on one (upper side in Figure 8) joining flange portion 21b by fastening means such as bolts, and the other end of the connecting member 24 in the direction of extension (lower side in Figure 8) is fixed to a rib plate 21c provided on the other (lower side in Figure 8) joining flange portion 21b by fastening means such as bolts.

[0038] The connecting member 24 is not particularly limited as long as it is positioned adjacent to the steel pipe member SP in the radial direction of the steel pipe member SP, but preferably the end of the connecting member 24 on the steel pipe member SP side is positioned within a length of 1 / 10 or less of the radial length of the steel pipe member SP from the radial end of the steel pipe member SP, more preferably within a length of 1 / 20 or less of the radial length of the steel pipe member SP from the radial end of the steel pipe member SP, and even more preferably in contact with the joining clamping portion 21a. In this specification, the connecting member 24 is shown as being provided on the joining member 2 in the second embodiment, but it may also be provided on the joining member 2 in the first, third, and fourth embodiments, similar to the joining member 2 in the second embodiment.

[0039] The joining member 2 may be provided with a rib plate 21c that extends substantially perpendicular to the longitudinal direction LD and on the opposite side from the steel pipe member SP, as shown in the joining structure 1 of the first to third embodiments in Figures 1 to 3, 7, 8, and 9 to 11. By providing the joining member 2 with a rib plate 21c that extends substantially perpendicular to the longitudinal direction LD, deformation in the direction in which the rib plate 21c extends is suppressed, and the joining strength to the steel pipe member SP can be increased. In the first to third embodiments, the rib plate 21c is provided as part of the joining clamping member 21 and extends substantially perpendicular to the longitudinal direction LD from the surface of the joining clamping portion 21a and the joining flange portion 21b. As a result, when the joining clamping members 21, 21 are subjected to a tensile force perpendicular to the longitudinal direction LD from the reinforcing members BD, HS, deformation of the joining clamping portion 21a is suppressed, and the widening of the gap between the fixed joining flange portions 21b, 21b is suppressed, thereby suppressing the occurrence of a gap between the joining clamping portions 21a, 21a (and joining flange portions 21d, 21d) and the outer surface of the steel pipe member SP. This suppresses a decrease in the engagement force between the joining member 2 and the steel pipe member SP in the direction perpendicular to the longitudinal direction LD of the steel pipe member SP, and suppresses the relative movement of the joining member 2 with respect to the steel pipe member SP in the direction perpendicular to the longitudinal direction LD. In addition, a decrease in the frictional force (and possibly adhesive force) between the joining member 2 and the outer surface of the steel pipe member SP is suppressed, and the relative movement of the joining member 2 with respect to the steel pipe member SP in the longitudinal direction LD is suppressed. In the fourth embodiment, as shown in Figures 13 to 15, a joining flange 21d is provided on the joining clamping member 21 of the joining member 2, and this joining flange 21d has the same function as the rib plate 21c described above. However, the joining member 2 in the fourth embodiment may also be provided with the rib plate 21c described above, similar to the joining member 2 of the joining structure 1 in the first to third embodiments.

[0040] As shown in Figures 1, 2, 7, 9, 10, and 13-15, the shear force resistance member 3 is positioned to abut against the joining member 2 in the longitudinal direction LD of the steel pipe member SP and is joined to the steel pipe member SP so as to cover its outer circumference. By joining the shear force resistance member 3 to the steel pipe member SP so as to cover its outer circumference, the frictional force and / or adhesive force generated between the shear force resistance member 3 and the steel pipe member SP suppresses relative movement of the shear force resistance member 3 with respect to the steel pipe member SP in the longitudinal direction LD. The shear force resistance member 3, whose relative movement in the longitudinal direction LD is suppressed, is positioned to abut against the joining member 2 in the longitudinal direction LD, thereby resisting the shear force in the longitudinal direction LD received from the joining member 2 and suppressing the relative movement of the joining member 2 with respect to the steel pipe member SP in the longitudinal direction LD. In this embodiment, the shear force resistance member 3 is positioned to directly contact the joining member 2 in the longitudinal direction LD of the steel pipe member SP. However, as long as the relative movement of the joining member 2 with respect to the steel pipe member SP in the longitudinal direction LD can be suppressed, the configuration is not limited to this embodiment, and the member 3 may be positioned to indirectly contact the joining member 2 via another member.

[0041] In the first to third embodiments, as shown in Figures 4 and 12, the shear force resistance member 3 is joined to the steel pipe member SP by directly contacting the surface of the steel pipe member SP over substantially the entire circumference of the circumferential CD of the outer circumference of the steel pipe member SP, thereby covering substantially the entire circumference of the circumferential CD of the outer circumference of the steel pipe member SP. By joining the shear force resistance member 3 to the steel pipe member SP in a manner that covers substantially the entire circumference of the circumferential CD of the outer circumference of the steel pipe member SP, the frictional force between the shear force resistance member 3 and the steel pipe member SP becomes larger, and the relative movement between the shear force resistance member 3 and the steel pipe member SP in the longitudinal direction LD is further suppressed. However, the shear force resistance member 3 is not limited to this embodiment, as long as it covers the outer circumference of the steel pipe member SP and is joined to the steel pipe member SP so that relative movement of the steel pipe member SP in the longitudinal direction LD is suppressed. For example, it may be joined to the steel pipe member SP so as to cover a part of the circumferential direction CD of the outer circumference of the steel pipe member SP, or it may be joined to the steel pipe member SP by indirectly contacting the surface of the steel pipe member SP via another material such as a rubber material that increases friction. Furthermore, in the fourth embodiment, as shown in Figures 13 to 15, the shear force resistance member 3 is joined to the steel pipe member SP so as to cover substantially the entire circumference of the circumferential direction CD of the outer circumference of the steel pipe member SP, with the resistance flange portion 31d (described later) directly or indirectly contacting the surface of the outer circumference of the steel pipe member SP, and the resistance clamping portion 31a (described later) indirectly contacting the surface of the steel pipe member SP via an adhesive 34. By joining the shear force resistance member 3 to the steel pipe member SP so that it covers substantially the entire circumference of the circumferential direction CD of the outer circumference of the steel pipe member SP, the frictional force and / or adhesive force between the shear force resistance member 3 and the steel pipe member SP becomes greater, and the relative movement between the shear force resistance member 3 and the steel pipe member SP in the longitudinal direction LD is further suppressed. However, in the fourth embodiment as well, the shear force resistance member 3 may be joined to the steel pipe member SP so as to cover a portion of the circumferential direction CD of the outer circumference of the steel pipe member SP. Also, in the first to third embodiments as well, the shear force resistance member 3 may be joined to the steel pipe member SP via adhesive 34.

[0042] Even when the connecting member 2 is subjected to tensile force along the longitudinal direction LD from the reinforcing members BD and HS, its relative movement relative to the steel pipe member SP in the longitudinal direction LD is suppressed by the frictional force (and possibly adhesive force) between the connecting member 2 and the steel pipe member SP, as well as the frictional force between the shear force resistance member 3 and the steel pipe member SP and / or the adhesive force between the shear force resistance member 3 and the steel pipe member SP. Furthermore, even if the connecting member 2 is subjected to tensile force perpendicular to the longitudinal direction LD from the reinforcing members BD and HS as described above, and the frictional force (and possibly adhesive force) between the connecting member 2 and the steel pipe member SP decreases, its relative movement relative to the steel pipe member SP in the longitudinal direction LD is suppressed by the frictional force between the shear force resistance member 3 and the steel pipe member SP, to which the reinforcing members BD and HS are not joined, and / or the adhesive force between the shear force resistance member 3 and the steel pipe member SP. In other words, even if sufficient frictional force (and possibly adhesive force) does not exist between the joining member 2 and the steel pipe member SP, the frictional force between the shear force resistance member 3 and the steel pipe member SP and / or the adhesive force between the shear force resistance member 3 and the steel pipe member SP suppress the relative movement of the joining member 2 with respect to the steel pipe member SP in the longitudinal direction LD. As a result, the relative movement of the reinforcing members BD and HS joined to the joining member 2 with respect to the steel pipe member SP in the longitudinal direction LD is suppressed, thereby reducing the loss of force transmission between them and the steel pipe member SP and providing a reinforcing effect on the existing structure.

[0043] According to the joining structure 1 of this embodiment, as described above, by arranging the shear force resistance member 3 separately from the joining member 2 to which the reinforcing members BD and HS are joined, so as to abut the joining member 2 in the longitudinal direction LD of the steel pipe member SP, the reinforcing members BD and HS can be firmly joined to the steel pipe member SP, and since there is no need to use through bolts as in the conventional technology, the reinforcing members BD and HS can be easily joined to the steel pipe member SP in existing structures.

[0044] In this embodiment, the shear force resistance members 3, 3 are joined to the steel pipe member SP on both sides of the longitudinal direction LD, sandwiching the joining member 2, as shown in Figures 1, 2, 7, 9, 10, and 13, 14. By providing the shear force resistance members 3, 3 on both sides of the longitudinal direction LD, sandwiching the joining member 2, relative movement of the joining member 2 to both sides of the longitudinal direction LD is suppressed. For example, in the joining structure 1 of the first and second embodiments shown in Figures 1, 2, and 7, two braces BD are joined to each side of the longitudinal direction LD of the joining member 2. When the joining member 2 receives tensile force from the two braces BD on one side of the longitudinal direction LD (upper side in Figures 1, 2, and 7), it receives tensile force to one side of the longitudinal direction LD, but relative movement to one side of the longitudinal direction LD is suppressed by the shear force resistance members 3 positioned on one side of the longitudinal direction LD. Furthermore, when the joining member 2 receives tensile force from the two braces BD on the other side of the longitudinal direction LD (the lower side in Figures 1, 2, and 7), it receives tensile force toward the other side of the longitudinal direction LD. However, the relative movement of the longitudinal direction LD toward the other side is suppressed by the shear force resistance member 3 located on the other side of the longitudinal direction LD. Similarly, in the case of the joining structure 1 of the third and fourth embodiments shown in Figures 9, 10 and 13, 14, the relative movement of the joining member 2 toward both sides of the longitudinal direction LD is suppressed by the shear force resistance members 3, 3 provided on both sides of the longitudinal direction LD. However, the shear force resistance member 3 may be joined to the steel pipe member SP on either side of the longitudinal direction LD where suppression of relative movement of the joining member 2 is necessary, depending on the arrangement of the reinforcing members BD and HS.

[0045] The pair of shear force resistance members 3, 3, which are joined to the steel pipe member SP on both sides of the longitudinal direction LD with the joining member 2 in between, are preferably connected to each other by connecting bolts 33 extending in the longitudinal direction LD, as shown in the joining structure 1 of the first to third embodiments in Figures 1, 2, 7 and 9, 10, so as to suppress relative movement of each other in the direction of separation in the longitudinal direction LD. In the first to third embodiments, the pair of shear force resistance members 3, 3 are connected to each other by connecting bolts 33 to the rib plates 31c, 31c of the resistance clamping members 31, 31, which will be described later. In the first to third embodiments, the connecting bolts 33 connect one rib plate 31c, 31c of each of the shear force resistance members 3, 3 on both sides, but they may also penetrate multiple rib plates 31c, 31c of each of the shear force resistance members 3, 3 on both sides to connect multiple rib plates 31c, 31c. Furthermore, in the first to third embodiments, the connecting bolts 33 are fixed by two nuts provided on the outside of the longitudinal direction LD of the opposing rib plates 31c, 31c, but they may also be fixed by nuts provided sandwiching each rib plate 31c in the longitudinal direction LD. Also, in the first to third embodiments, the connecting bolts 33 directly connect the shear force resistance members 3, 3 on both sides, but they may also be indirectly connected via the connecting member 2 by connecting the respective rib plates 31c, 31c of the shear force resistance members 3, 3 on both sides to the rib plates 21c, 21c of the connecting member 2 as high-tension bolts. In addition, the pair of shear force resistance members 3, 3 only need to be connected to each other in a way that suppresses relative movement of each other in the longitudinal direction LD, and they may also be connected to each other via parts other than the rib plates 31c, 31c. In the fourth embodiment of the joint structure 1, the connecting bolts 33 described above are not provided. However, similar to the joint structures 1 of the first to third embodiments, connecting bolts 33 may be provided to connect the pair of shear force resistance members 3, 3 to each other. In that case, the above-described configuration related to the connecting bolts 33 will also apply to the joint structure 1 of the fourth embodiment.

[0046] The pair of shear force resistance members 3, 3 have their relative movement in the direction of separation from each other in the longitudinal direction LD suppressed, thereby further suppressing the relative movement of the joining member 2 with respect to the steel pipe member SP in the longitudinal direction LD. Specifically, referring to the joining structure 1 of the first embodiment shown in Figures 1 and 2, when the joining member 2 receives a tensile force toward one side of the longitudinal direction LD from two braces BD on one side of the longitudinal direction LD (upper side in Figures 1 and 2), it transmits the shear force toward one side of the longitudinal direction LD to the shear force resistance member 3 located on one side of the longitudinal direction LD. The shear force resistance member 3 on one side transmits the shear force received from the joining member 2 to the other shear force resistance member 3 located on the other side of the longitudinal direction LD (lower side in Figures 1 and 2), which is connected to each other in the longitudinal direction LD. As a result, the shear force received from the joining member 2 can be resisted by both the pair of shear force resistance members 3, 3 provided on both sides of the longitudinal direction LD, thereby further suppressing the relative movement of the joining member 2 with respect to the steel pipe member SP in the longitudinal direction LD. Similarly, when the joining member 2 receives a tensile force from the two braces BD on the other side of the longitudinal direction LD (lower side in Figures 1 and 2) toward the other side of the longitudinal direction LD, the shear force received from the joining member 2 can be resisted by both the pair of shear force resistance members 3, 3 provided on both sides of the longitudinal direction LD. The same applies to the joining structure 1 of the second and third embodiments shown in Figures 7 and 9 and 10, as well as when the joining structure 1 of the fourth embodiment is provided with connecting bolts 33.

[0047] The shear force resistance member 3 only needs to be joined to the steel pipe member SP so as to partially cover the outer circumference of the steel pipe member SP so that relative movement of the steel pipe member SP in the longitudinal direction LD is suppressed, and its configuration is not particularly limited. In the first to third embodiments, the shear force resistance member 3 includes a pair of resistance clamping members 31, 31 that clamp the steel pipe member SP in a direction substantially perpendicular to the longitudinal direction LD of the steel pipe member SP (clamping direction SD2 in this embodiment) and are fixed to each other, as shown in Figures 1, 2, 4, 7 and 9, 10, 12. The pair of resistance clamping members 31, 31 are fixed to each other while clamping the steel pipe member SP in the clamping direction SD2, thereby joining the steel pipe member SP so as to cover substantially the entire circumference of the outer circumference CD of the steel pipe member SP. The pair of resistance clamping members 31, 31 cover almost the entire circumference of the circumferential direction CD of the outer circumference of the steel pipe member SP, thereby increasing the frictional force between the pair of resistance clamping members 31, 31 and the outer surface of the steel pipe member SP, and further suppressing the relative movement of the pair of resistance clamping members 31, 31 with respect to the steel pipe member SP in the longitudinal direction LD. In the fourth embodiment, as shown in Figures 14 and 15, the shear force resistance member 3 includes a pair of resistance clamping members 31, 31 that are fixed to the steel pipe member SP by clamping it in a direction approximately perpendicular to the longitudinal direction LD of the steel pipe member SP (clamping direction SD2 in this embodiment). The pair of resistance clamping members 31, 31 are fixed to the steel pipe member SP via adhesive 34 while clamping the steel pipe member SP in the clamping direction SD2, thereby joining them to the steel pipe member SP so as to cover almost the entire circumference of the circumferential direction CD of the outer circumference of the steel pipe member SP. The pair of resistance clamping members 31, 31 cover almost the entire circumference of the circumferential direction CD of the outer circumference of the steel pipe member SP, thereby increasing the frictional and / or adhesive force between the pair of resistance clamping members 31, 31 and the outer surface of the steel pipe member SP, and further suppressing the relative movement of the pair of resistance clamping members 31, 31 with respect to the steel pipe member SP in the longitudinal direction LD. In the fourth embodiment, the pair of resistance clamping members 31, 31 are fixed to each other via a joining plate 35 as shown in Figure 14, but they do not necessarily have to be fixed to each other as long as they are joined to the steel pipe member SP via adhesive 34.In this embodiment, the shear force resistance member 3 comprises a pair (two) resistance clamping members 31, 31. However, the embodiment is not limited to this one, as long as at least two resistance clamping members are provided to clamp the steel pipe member SP in a direction substantially perpendicular to the longitudinal direction LD, not just in the clamping direction SD2. For example, three or more resistance clamping members may be arranged in a line along the circumferential direction CD of the steel pipe member SP. Furthermore, in the first, second, and fourth embodiments, the clamping direction SD2 of the pair of resistance clamping members 31, 31 is substantially parallel to the clamping direction SD1 of the pair of joining clamping members 21, 21, and in the third embodiment, it is substantially perpendicular to the clamping direction SD1 of the pair of joining clamping members 21, 21. However, this is not particularly limited, and can be appropriately modified depending on the arrangement of adjacent members.

[0048] The resistive clamping member 31 is not limited in its constituent material as long as it has sufficient strength to suppress deformation due to the shear force received from the joining member 2; for example, it can be formed from a known steel plate.

[0049] In the first to third embodiments, the resistance clamping member 31 comprises a partially cylindrical resistance clamping portion 31a that directly or indirectly contacts the outer surface of the steel pipe member SP, and a resistance flange portion 31b that extends radially outward from the end of the resistance clamping portion 31a in the circumferential direction CD, as shown in Figures 1, 2, 4, 7, and 9, 10, 12. At least two (a pair in the first to third embodiments) resistance clamping members 31, 31 are joined to the steel pipe member SP by fixing the opposing resistance flange portions 31b, 31b of adjacent resistance clamping members 31, 31 in the circumferential direction CD of the steel pipe member SP to each other by clamping bolts 32 that extend in the direction in which the resistance flange portions 31b, 31b face each other. Furthermore, in the fourth embodiment, as shown in Figures 13 to 15, the resistance clamping member 31 includes a partially cylindrical resistance clamping portion 31a that indirectly contacts the outer surface of the steel pipe member SP, and a resistance flange portion 31d that extends substantially perpendicular to the longitudinal direction LD from the inside to the outside of the resistance clamping portion 31a, over substantially the entire circumferential direction CD of the resistance clamping portion 31a. When the resistance clamping member 31 is joined to the steel pipe member SP, the resistance flange portion 31d contacts the outer surface of the steel pipe member SP, and a space is formed in which adhesive 34 is filled into the region surrounded by the resistance clamping portion 31a, the resistance flange portion 31d, and the outer surface of the steel pipe member SP (see Figure 15). The resistance clamping member 31 is joined to the steel pipe member SP by the adhesive 34 being filled into the formed space. In the fourth embodiment, before the resistance clamping member 31 is attached to the steel pipe member SP, adhesive 34 is filled into the space corresponding to the above space, which is divided into a resistance clamping portion 31a and a resistance flange portion 31d, and then the resistance clamping member 31 is attached to the steel pipe member SP. In the fourth embodiment, at least two (a pair in the fourth embodiment) resistance clamping members 31, 31 are fixed to each other by bonding plates 35 that are bonded to span the corresponding resistance flange portions 31d, 31d, as shown in Figure 14.The shear force resistance member 3 is configured such that at least two (a pair in the fourth embodiment) resistance clamping members 31, 31 are fixed to each other. This further suppresses the separation of the resistance clamping members 31, 31 from the steel pipe member SP when the shear force resistance member 3 receives a force from the joint member 2 along the longitudinal direction LD, thereby enabling it to exert greater resistance to the shear force received from the joint member 2. The resistance clamping members 31, 31 may be fixed to each other by a stainless steel belt that encircles the entire circumference of their respective resistance clamping portions 31a, 31a, or they may be fixed to each other by adhesive.

[0050] The resistance clamping portion 31a is a portion that directly or indirectly contacts the outer surface of the steel pipe member SP and covers a portion of the circumferential CD of the outer surface of the steel pipe member SP. By directly or indirectly contacting the outer surface of the steel pipe member SP, the resistance clamping portion 31a generates a frictional force between itself and the outer surface of the steel pipe member SP. In the first to third embodiments, the resistance clamping portion 31a is positioned to directly contact the outer surface of the steel pipe member SP, as shown in Figures 4 and 12. However, the resistance clamping portion 31a is not limited to the illustrated examples, as long as it contacts the outer surface of the steel pipe member SP in such a way that a frictional force is generated between it and the outer surface of the steel pipe member SP. For example, it may be positioned to contact indirectly via another material, such as a rubber material that enhances the frictional force. Furthermore, in the fourth embodiment, the resistance clamping portion 31a is bonded to the outer surface of the steel pipe member SP via an adhesive 34, as shown in Figure 15. This creates an adhesive force between the resistance clamping portion 31a and the outer surface of the steel pipe member SP.

[0051] The resistance clamping portion 31a only needs to be able to directly or indirectly contact the outer surface of the steel pipe member SP, and its shape and size are not particularly limited. For example, in the first to third embodiments, the resistance clamping portion 31a is formed to have a shape and size that corresponds to the shape and size of the outer surface of the steel pipe member SP. More specifically, as shown in Figures 4 and 12, the resistance clamping portion 31a is formed in a substantially half-cylindrical shape to correspond to the outer shape of the substantially cylindrical steel pipe member SP, and the inner diameter of the resistance clamping portion 31a is formed to be substantially the same as the outer diameter of the steel pipe member SP, or slightly larger than the outer diameter of the steel pipe member SP, to correspond to the size of the outer circumference of the steel pipe member SP. For example, in the fourth embodiment, as shown in Figures 13 to 15, the resistance clamping portion 31a is formed in a substantially half-cylindrical shape to correspond to the shape of the outer circumference of the substantially cylindrical steel pipe member SP, and the inner diameter of the resistance clamping portion 31a is formed to be larger than the outer diameter of the steel pipe member SP so that adhesive 34 can be filled between the resistance clamping portion 31a and the outer surface of the steel pipe member SP. In the fourth embodiment, the resistance clamping portion 31a only needs to have an inner diameter larger than the outer diameter of the steel pipe member SP so that adhesive 34 can be filled, and is not particularly limited, but it is preferable that it has substantially the same diameter as the joining clamping portion 21a of the joining member 2 and is formed and arranged so that they are aligned substantially in the same straight line in a cross section along the longitudinal direction LD (see Figure 15). As a result, when force is transmitted from the joining member 2 to the shear force resistance member 3, deformation of the joining member 2 and the shear force resistance member 3 is suppressed, and the resistance force of the shear force resistance member 3 can be increased. In this embodiment, the resistance clamping portion 31a is formed in a substantially half-cylindrical shape. However, if the steel pipe member SP is formed in a cylindrical shape other than a cylindrical shape, it may be formed in a substantially half-cylindrical shape corresponding to the shape of the outer circumference of the steel pipe member SP. Furthermore, the resistance clamping portion 31a is not limited to a substantially half-cylindrical shape as long as it can cover a part of the circumferential direction CD of the outer circumference of the steel pipe member SP, and may be formed in a partially cylindrical shape such as a 1 / 3 half-cylindrical or 2 / 3 half-cylindrical shape. In addition, the resistance clamping portion 31a may be formed to a size such that a gap is created between the resistance clamping portions 31a, 31a when the steel pipe member SP is clamped in the clamping direction SD2 together with the other resistance clamping portion 31a.

[0052] In the first to third embodiments, the resistance flange portion 31b is fixed to the resistance flange portion 31b of another resistance clamping member 31 adjacent to the steel pipe member SP in the circumferential direction CD, thereby fixing adjacent resistance clamping members 31, 31 to each other in the circumferential direction CD of the steel pipe member SP. In the first to third embodiments, as shown in Figures 1, 2, 4, 7, and 9, 10, 12, the resistance flange portion 31b is formed in a plate shape so as to extend radially outward from both ends of the resistance clamping portion 31a in the circumferential direction CD, along a direction substantially perpendicular to both the longitudinal direction LD and the clamping direction SD2. However, as long as the resistance flange portion 31b is formed to extend radially outward from the end of the resistance clamping portion 31a in the circumferential direction CD, its direction of extension is not limited to a direction substantially perpendicular to both the longitudinal direction LD and the clamping direction SD2, and can be appropriately modified according to the arrangement of the resistance flange portion 31b of the other resistance clamping member 31 to which it is fixed. Although the resistance clamping member 31 of the joint structure 1 in the fourth embodiment is not provided with the resistance flange portion 31b described above, it may be provided with the resistance flange portion 31b, similar to the joint structure 1 in the first to third embodiments. In that case, at least two (a pair in the fourth embodiment) resistance clamping members 31, 31 are fixed to each other via the resistance flange portions 31b, 31b.

[0053] In the first to third embodiments, it is preferable that the shear force resistance member 3 is joined to the steel pipe member SP such that the frictional force between it and the steel pipe member SP is as large as possible. More specifically, it is preferable that the shear force resistance member 3 is joined to the steel pipe member SP such that the frictional force between it and the steel pipe member SP is greater than the frictional force (and optionally adhesive force) between the joining member 2 and the steel pipe member SP. By doing so, the relative movement of the joining member 2 with respect to the steel pipe member SP in the longitudinal direction LD can be further suppressed. For the purpose of increasing the frictional force between the shear force resistance member 3 and the steel pipe member SP, in the first to third embodiments, as shown in Figure 5(a), at least two (a pair in the first to third embodiments) resistance clamping members 31, 31 are arranged such that the resistance clamping portions 31a, 31a of at least two resistance clamping members 31, 31 are in direct or indirect contact with the outer surface of the steel pipe member SP, while a gap G is created between the opposing resistance flange portions 31b, 31b of adjacent resistance clamping members 31, 31 in the circumferential direction CD of the steel pipe member SP, before they are fixed to each other by the clamping bolts 32. As shown in Figure 5(b), at least two resistance clamping members 31, 31 are joined to the steel pipe member SP by clamping bolts 32 that extend in directions opposite each other, so as to clamp the steel pipe member SP in a direction substantially perpendicular to the longitudinal direction LD (clamping direction SD2 in the first to third embodiments) and apply a compressive force to the steel pipe member SP. This increases the clamping force on the steel pipe member SP by the resistance clamping members 31, 31, and thus increases the frictional force between the resistance clamping members 31, 31 and the steel pipe member SP. The above configuration can also be applied when the resistance clamping member 31 of the joining structure 1 of the fourth embodiment is provided with a resistance flange portion 31b.

[0054] Furthermore, in this embodiment, in order to increase the frictional force or adhesive force between the shear force resistance member 3 and the steel pipe member SP, the surface roughness of the joint SP1 (see Figure 6) of the steel pipe member SP to which the shear force resistance member 3 is joined may be increased. This makes it possible to further increase the frictional force or adhesive force between the shear force resistance member 3 and the steel pipe member SP, and to further suppress the relative movement of the joining member 2 in the longitudinal direction LD. Moreover, by increasing the surface roughness of the joint SP1 of the steel pipe member SP to which the shear force resistance member 3 is joined, the surface roughness of the surface of the joint SP1 may be greater than the surface roughness of the joint SP2 (see Figure 6) of the steel pipe member SP to which the joining member 2 is joined. As a result, the frictional force between the joining member 2 and the steel pipe member SP becomes smaller than the frictional force between the shear force resistance member 3 and the steel pipe member SP, so when joining the joining member 2 and the shear force resistance member 3 to the steel pipe member SP, the sliding of the joining member 2 with respect to the steel pipe member SP in the longitudinal direction LD becomes easier, and the alignment of the joining member 2 with respect to the steel pipe member SP becomes easier.

[0055] In the first to third embodiments, the shear force resistance member 3 may be provided with a rib plate 31c extending substantially perpendicular to the longitudinal direction LD and on the opposite side from the steel pipe member SP, as shown in Figures 1, 2, 4, 7, and 9, 10, 12. By providing the shear force resistance member 3 with a rib plate 31c extending substantially perpendicular to the longitudinal direction LD, deformation in the direction in which the rib plate 31c extends is suppressed, and the joint strength with respect to the steel pipe member SP can be increased. In this embodiment, the rib plate 31c is provided as part of the resistance clamping member 31 and extends substantially perpendicular to the longitudinal direction LD from the surfaces of the resistance clamping portion 31a and the resistance flange portion 31b. This suppresses deformation of the resistance clamping portion 31a and the resistance flange portion 31b in the direction in which the rib plate 31c extends. In the first to third embodiments, as described above, the resistance clamping members 31, 31 are formed such that a gap G is provided between the resistance flange portions 31b, 31b before they are fixed to each other. Therefore, when they are fixed to each other by the clamping bolts 32, bending stress is generated in a direction substantially perpendicular to the longitudinal direction LD. The rib plate 31c resists this bending stress, thereby suppressing the deformation of the resistance clamping members 31, 31 when they are fixed to each other, and suppressing the reduction in frictional force between the resistance clamping portions 31a, 31a and the outer surface of the steel pipe member SP. In the fourth embodiment, as shown in Figures 13 to 15, the resistance clamping member 31 of the shear force resistance member 3 is provided with a resistance flange portion 31d, and this resistance flange portion 31d has the same function as the rib plate 31c described above. However, the shear force resistance member 3 in the fourth embodiment may also be provided with the rib plate 31c described above, similar to the shear force resistance member 3 of the joint structure 1 in the first to third embodiments.

[0056] Although embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. The above embodiments mainly describe an invention having the following configuration.

[0057] (1) A joining structure for joining a reinforcing member to a steel pipe member of an existing structure, A joining member is joined to the steel pipe member so as to cover the outer circumference of the steel pipe member, and to which the reinforcing member is joined, A shear force resistance member is joined to the steel pipe member so as to cover the outer circumference of the steel pipe member. Equipped with, A joining structure in which the shear force resistance member is arranged to directly or indirectly contact the joining member in the longitudinal direction of the steel pipe member.

[0058] (2) The shear force resistance member is joined to the steel pipe member on both sides in the longitudinal direction, with the joining member in between. (1) The joining structure described above.

[0059] (3) A pair of shear force resistance members joined to the steel pipe member on both sides of the joint member in the longitudinal direction are connected to each other by connecting bolts extending in the longitudinal direction such that relative movement of each other in the direction separating them in the longitudinal direction is suppressed. (2) The joining structure described above.

[0060] (4) The shear force resistance member comprises at least two resistance clamping members that clamp the steel pipe member in a direction substantially perpendicular to the longitudinal direction of the steel pipe member and are fixed to each other, The resistance clamping member comprises a partially cylindrical resistance clamping portion that directly or indirectly contacts the outer surface of the steel pipe member, and a resistance flange portion that extends radially outward from the circumferential end of the resistance clamping portion. The at least two resistance clamping members are arranged such that the resistance clamping portion of each of the at least two resistance clamping members directly or indirectly abuts the outer surface of the steel pipe member, but before they are fixed to each other, a gap is created between the opposing resistance flange portions of adjacent resistance clamping members in the circumferential direction of the steel pipe member. The at least two resistance clamping members are joined to the steel pipe member by clamping bolts that extend in directions opposite to each other, so as to clamp the steel pipe member in a direction substantially perpendicular to the longitudinal direction and apply a compressive force to the steel pipe member, with the opposing resistance flange portions fixed to each other. The joining structure described in any one of (1) to (3).

[0061] (5) The shear force resistance member is joined to the steel pipe member via an adhesive. A joining structure described in any one of (1) to (4).

[0062] (6) The joining member comprises at least two joining clamping members that clamp the steel pipe member in a direction substantially perpendicular to the longitudinal direction of the steel pipe member and are fixed to each other, The joining clamping member comprises a partially cylindrical joining clamping portion that directly or indirectly contacts the outer surface of the steel pipe member, and a joining flange portion that extends radially outward from the circumferential end of the joining clamping portion. The at least two joining clamping members are joined to the steel pipe member by fixing the opposing joining flange portions of adjacent joining clamping members in the circumferential direction of the steel pipe member to each other by fixing members extending in the direction in which the joining flange portions face each other. The fixing member for the at least two joining clamping members is positioned radially adjacent to the steel pipe member such that the joining flange portions of adjacent joining clamping members in the circumferential direction of the steel pipe member are prevented from widening the gap between them due to the force received from the reinforcing member. A joining structure described in any one of (1) to (5).

[0063] (7) The joining member is provided with a rib plate that extends substantially perpendicular to the longitudinal direction and on the side opposite to the steel pipe member. A joining structure described in any one of (1) to (6).

[0064] (8) The surface roughness of the surface of the joint of the steel pipe member to which the shear force resistance member is joined is greater than the surface roughness of the surface of the joint of the steel pipe member to which the joining member is joined. A joining structure described in any one of (1) to (7). [Explanation of Symbols]

[0065] 1 Joint structure 2 Joining members 21 Joint clamping member 21a Joint clamping part 21b Joint flange 21c Rib Plate 21d Joint flange 22 Clamping bolts 23. Clamping Washer 24 Connecting Members 25 Filler 3. Shear force resistance member 31 Resistance clamping member 31a Resistor clamping part 31b Resistance flange section 31c Rib Plate 31d Resistance collar 32 Clamping bolts 33 Connecting bolts 34 Adhesives 35 Joining Plate BD reinforcing member (brace) CD circumferential direction CM1, CM2 connecting members G Gap H injection hole HS reinforcing member (H-beam) LD (Long side) SD1, SD2 clamping direction SP steel pipe members SP1 Joint location of steel pipe member to which shear force resistance member is joined. The joint location of the steel pipe member to which the SP2 joint member is joined.

Claims

1. A joining structure for joining reinforcing members to steel pipe members of an existing structure, A joining member is joined to the steel pipe member so as to cover the outer circumference of the steel pipe member, and to which the reinforcing member is joined, wherein the joining member is joined to the steel pipe member such that the relative movement of the steel pipe member in the longitudinal direction is suppressed by the frictional force or adhesive force generated between the joining member and the steel pipe member, A shear force resistance member is joined to the steel pipe member so as to cover the outer circumference of the steel pipe member. Equipped with, A joining structure in which the shear force resistance member is arranged to directly or indirectly contact the joining member in the longitudinal direction of the steel pipe member.

2. The shear force resistance member comprises at least two resistance clamping members that clamp the steel pipe member in a direction substantially perpendicular to the longitudinal direction of the steel pipe member and are fixed to each other, The aforementioned resistance clamping member, A partially cylindrical resistance clamping portion that indirectly contacts the outer surface of the steel pipe member, On both sides of the longitudinal direction, flanking the resistance clamping portion, there are resistance flanges extending from the inside to the outside in the radial direction of the resistance clamping portion, over substantially the entire circumferential direction of the resistance clamping portion. Equipped with, The resistance clamping member is joined to the steel pipe member by filling the space surrounded by the resistance clamping portion, the resistance flange portion, and the outer surface of the steel pipe member with adhesive. The joining structure according to claim 1.

3. The joining member comprises at least two joining clamping members that clamp the steel pipe member in a direction substantially perpendicular to the longitudinal direction of the steel pipe member and are fixed to each other, The aforementioned joining clamping member, A partially cylindrical joining clamping portion that indirectly contacts the outer surface of the steel pipe member, On both sides of the longitudinal direction, flanking the aforementioned joining clamping portion, there are joining flanges that extend from the inside to the outside in the radial direction of the joining clamping portion, extending over substantially the entire circumferential direction of the joining clamping portion. Equipped with, When the joining clamping member is joined to the steel pipe member, a space is formed in the area surrounded by the joining clamping portion, the joining flange portion, and the outer surface of the steel pipe member, in which grout or adhesive is filled. The joining structure according to claim 1 or 2.

4. The shear force resistance member is joined to the steel pipe member on both sides in the longitudinal direction, with the joining member in between. The joining structure according to claim 1.

5. A joining structure for joining a reinforcing member to a steel pipe member of an existing structure, A joining member is joined to the steel pipe member so as to cover the outer circumference of the steel pipe member, and to which the reinforcing member is joined, A shear force resistance member is joined to the steel pipe member so as to cover the outer circumference of the steel pipe member. Equipped with, The shear force resistance member is arranged so as to be in direct or indirect contact with the joining member in the longitudinal direction of the steel pipe member. The shear force resistance member is joined to the steel pipe member on both sides in the longitudinal direction, with the joining member in between. A pair of shear force resistance members, joined to the steel pipe member on both sides of the joint member in the longitudinal direction, are connected to each other by connecting bolts extending in the longitudinal direction, such that relative movement between them in the direction separating them in the longitudinal direction is suppressed. Joint structure.

6. A joining structure for joining a reinforcing member to a steel pipe member of an existing structure, A joining member is joined to the steel pipe member so as to cover the outer circumference of the steel pipe member, and to which the reinforcing member is joined, A shear force resistance member is joined to the steel pipe member so as to cover the outer circumference of the steel pipe member. Equipped with, The shear force resistance member is arranged so as to be in direct or indirect contact with the joining member in the longitudinal direction of the steel pipe member. The shear force resistance member comprises at least two resistance clamping members that clamp the steel pipe member in a direction substantially perpendicular to the longitudinal direction of the steel pipe member and are fixed to each other. The resistance clamping member comprises a partially cylindrical resistance clamping portion that directly or indirectly contacts the outer surface of the steel pipe member, and a resistance flange portion that extends radially outward from the circumferential end of the resistance clamping portion. The at least two resistance clamping members are arranged such that the resistance clamping portion of each of the at least two resistance clamping members directly or indirectly abuts the outer surface of the steel pipe member, but before they are fixed to each other, a gap is created between the opposing resistance flange portions of adjacent resistance clamping members in the circumferential direction of the steel pipe member. The at least two resistance clamping members are joined to the steel pipe member by clamping bolts that extend in directions in which the resistance flange portions face each other, so as to clamp the steel pipe member in a direction substantially perpendicular to the longitudinal direction and apply a compressive force to the steel pipe member. Joint structure.

7. The joining member comprises at least two joining clamping members that clamp the steel pipe member in a direction substantially perpendicular to the longitudinal direction of the steel pipe member and are fixed to each other, The joining clamping member comprises a partially cylindrical joining clamping portion that directly or indirectly contacts the outer surface of the steel pipe member, and a joining flange portion that extends radially outward from the circumferential end of the joining clamping portion. The at least two joining clamping members are joined to the steel pipe member by fixing the opposing joining flange portions of adjacent joining clamping members in the circumferential direction of the steel pipe member to each other by fixing members extending in the direction in which the joining flange portions face each other. The fixing member for at least two joining clamping members is arranged radially adjacent to the steel pipe member such that the joining flange portions of adjacent joining clamping members in the circumferential direction of the steel pipe member are prevented from widening the gap between them due to the force received from the reinforcing member. The joining structure according to claim 1 or 2.

8. The surface roughness of the surface of the joint portion of the steel pipe member to which the shear force resistance member is joined is greater than the surface roughness of the surface of the joint portion of the steel pipe member to which the joining member is joined. The joining structure according to claim 1 or 2.

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