JP2023062658A - Joint structure - Google Patents

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

The present invention relates to a joint structure.

For example, as disclosed in Patent Literatures 1 and 2, reinforcing members such as braces are joined to steel pipe members via joining structures in order to reinforce an existing structure composed of steel pipe members. In the joint structure, 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 the reinforcing member absorbs the force generated in the steel pipe member. It is necessary to join the reinforcing member to the steel pipe member as follows.

As members constituting such a joint 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 connecting flanges to each other with bolts and by bonding and fixing the respective split tubular bodies to the steel pipe member with an adhesive. The pair of reinforcing member fixtures can resist shearing force in the longitudinal direction of the steel pipe members received from the braces by the adhesive that bonds and fixes the split tubular body and the steel pipe members, thereby connecting the steel pipe members and the braces. Relative movement between can be suppressed.

Further, Patent Document 2 discloses a pair of joint members fixed to sandwich a steel pipe member and to which a brace is fixed, as members constituting a joint structure. The pair of joining members are joined to the steel pipe members by fixing the flanges to each other with bolts, and fixing the holding portions to the steel pipe members by through-bolts passing through the steel pipe members. The pair of joining members can resist longitudinal shearing force of the steel pipe members received from the brace by through-bolts that fix the holding portion and the steel pipe members, thereby preventing relative movement between the steel pipe members and the brace. can be suppressed.

JP 2009-102877 A Japanese Patent Application Laid-Open No. 2020-59968

However, even if an adhesive is used to join the pair of reinforcing member fixtures to the steel pipe member as in Patent Document 1, the adhesive will not be stretched perpendicularly to the longitudinal direction of the steel pipe member received from the brace. Since the resistance to force is extremely weak, when a tensile force perpendicular to the longitudinal direction of the steel pipe member is received from the brace, there is a possibility that it will separate from the pair of reinforcing member fixtures and the steel pipe member. However, it is not possible to maintain the resistance to the longitudinal shear force of the steel pipe member received from the brace. In order to use a through-bolt to join a pair of joining members to a steel pipe member as in Patent Document 2, it is necessary to provide a bolt hole for the through-bolt in the existing steel pipe member. The work of forming bolt holes at a construction site is complicated, and not only is it difficult to determine the positions where bolt holes are to be formed, but the formation of bolt holes also reduces the strength of the steel pipe member. In addition, when changing the position of the joint member once positioned, it is necessary to provide a new bolt hole, which not only makes the work more complicated, but also causes a further decrease in the strength of the steel pipe member.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a joining structure capable of firmly and easily joining a reinforcing member to a steel pipe member in an existing structure.

The joining structure of the present invention is a joining structure for joining a reinforcing member to a steel pipe member of an existing structure, wherein the joining structure is joined to the steel pipe member so as to cover the outer circumference of the steel pipe member, and the reinforcing member is joined. a joining member; and a shear force resistance member joined to the steel pipe member so as to cover the outer periphery of the steel pipe member, wherein the shear force resistance member is directly or indirectly connected to the joint member in the longitudinal direction of the steel pipe member. characterized by being arranged so as to abut on the

Moreover, 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 interposed therebetween.

In addition, the pair of shear force resistance members joined to the steel pipe member on both sides in the longitudinal direction with the joint member interposed therebetween is restrained from moving relative to each other in a direction separating from each other in the longitudinal direction. Preferably, they are connected to each other by connecting bolts extending in the longitudinal direction.

In addition, the shear force resisting member includes at least two resisting clamping members fixed relative to each other, clamping the steel pipe member in a direction substantially perpendicular to the longitudinal direction of the steel pipe member, wherein the resisting clamping member comprises: a partially cylindrical resistance clamping portion that directly or indirectly abuts the surface of the outer periphery of the steel pipe member; and a resistance flange portion that extends radially outward from a circumferential end of the resistance clamping portion. The two resistance clamping members are arranged such that the respective resistance clamping portions of the at least two resistance clamping members are in direct or indirect contact with the surface of the outer circumference of the steel pipe member, but are not fixed to each other. In the state of, a gap is formed between opposing resistance flange portions of the resistance clamping members that are adjacent in the circumferential direction of the steel pipe member, and the at least two resistance clamping members are arranged in the longitudinal direction The opposing flange portions are fixed to each other by sandwiching bolts extending in the direction in which the resistor flange portions face each other so that the steel pipe member is sandwiched in a substantially vertical direction and a compressive force is applied to the steel pipe member. , is preferably joined to the steel pipe member.

Moreover, it is preferable that the shear force resistance member is joined to the steel pipe member via an adhesive.

Further, the joining member includes at least two joining and 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 and clamping member includes the steel pipe. a part-cylindrical joint clamp directly or indirectly abutting the outer peripheral surface of the member; and a joint flange extending radially outwardly from a circumferential end of the joint clamp, wherein the at least two joints The clamping member is configured such that the joint flange portions facing each other of the joint clamping members adjacent in the circumferential direction of the steel pipe member are fixed to each other by a fixing member extending in the direction in which the joint flange portions face each other. The fixing member for the at least two joining clamp members joined to the steel tube member is such that the joining flange portions of the joining clamp members that are adjacent in the circumferential direction of the steel tube member are held between each other by the force received from the reinforcing member. It is preferable that the steel pipe member is arranged adjacent to the steel pipe member in the radial direction so that the interval between the steel pipe members is suppressed from widening.

Moreover, it is preferable that the joining member is provided with a rib plate extending substantially perpendicularly to the longitudinal direction in a direction opposite to the steel pipe member.

Further, it is preferable that the surface roughness of the joint portion of the steel pipe member to which the shear force resistance member is joined is larger than the surface roughness of the joint portion of the steel pipe member to which the joint member is joined.

ADVANTAGE OF THE INVENTION According to this invention, the joint structure which can join a reinforcement member to a steel pipe member easily in an existing structure can be provided.

1 is a front view of a joint structure according to a first embodiment of the present invention; FIG. FIG. 2 is a side view of the joint structure of FIG. 1; FIG. 2 is a cross-sectional view taken along line III-III of the joint structure of FIG. 1; FIG. 2 is a sectional view taken along line IV-IV of the joint structure of FIG. 1; FIG. 2 is a cross-sectional view showing the state before and after joining between the shear force resistance member and the steel pipe member in the joint structure of FIG. state. FIG. 2 is a front view showing a joint member and a shear force resistance member in the joint structure of FIG. 1 with imaginary lines; It is a front view of the joining structure which concerns on 2nd Embodiment of this invention. FIG. 8 is a cross-sectional view taken along line VIII-VIII of the junction structure of FIG. 7; It is a front view of the joining structure which concerns on 3rd Embodiment of this invention. FIG. 10 is a side view of the joint structure of FIG. 9; FIG. 10 is a sectional view taken along line XI-XI of the joint structure of FIG. 9; FIG. 10 is a cross-sectional view of the joint structure of FIG. 9 taken along line XII-XII; It is a front view of the junction structure concerning a 4th embodiment of the present invention. 14 is a perspective view of the joint structure of FIG. 13; FIG. FIG. 14 is a cross-sectional view of the junction structure of FIG. 13 taken along line XV-XV;

Hereinafter, joint structures according to four embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments shown below are merely examples, and the joint structure of the present invention is not limited to the following examples. 1 to 6 are diagrams related to the joint structure 1 according to the first embodiment, FIGS. 7 to 8 are diagrams related to the joint structure 1 according to the second embodiment, and FIGS. 12 is a diagram related to the joint structure 1 according to the third embodiment, and FIGS. 13 to 15 are diagrams related to the joint structure 1 according to the fourth embodiment. In the following, configurations common to all the embodiments will be collectively described, and configurations different in each embodiment will be added as appropriate. In the following description, the term "this embodiment" refers to all embodiments. In addition, in all the drawings, the same reference numerals are given to elements having common functions in the joint structure of each embodiment.

The joint structure 1 of the present embodiment is used to join reinforcing members BD and HS to steel pipe members SP of an existing structure, as shown in FIGS. . The existing structure to which the joint structure 1 is applied is not particularly limited as long as it is an existing structure at least partially composed of the steel pipe member SP, and an example is an existing steel pipe truss structure. be done. 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 tubular member made of steel. , see also FIGS. 11 to 12 and FIG. 14), other tubular shapes such as a rectangular tubular shape, and the constituent material thereof may be carbon steel or stainless steel.

The reinforcing members BD and HS 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 vibration energy generated in the steel pipe member SP when the existing structure receives disturbances such as earthquake motion and wind, and/or resist external forces received from the steel pipe member SP, thereby strengthening the existing structure. By suppressing the deformation of objects and improving the strength of existing structures, the earthquake resistance and damping properties of existing structures are improved. The reinforcing members BD and HS are not particularly limited as long as they can be joined to the steel pipe member SP to reinforce the existing structure. Examples include a brace joined to the steel pipe member SP by the joining structure 1, and an H-section steel joined to the steel pipe member SP by the joining structure 1 of the third and fourth embodiments shown in FIGS.

As shown in FIGS. 1 to 2, 7, 9 to 10, and 13 to 14, the joint structure 1 is joined to the steel pipe member SP so as to cover the outer periphery of the steel pipe member SP, and the reinforcing members BD and HS are It comprises a joining member 2 to be 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.

As shown in FIGS. 1, 7, 9, and 13, the joint member 2 is joined to the steel pipe member SP, and the reinforcing members BD and HS are joined together, whereby the reinforcing members BD and HS are joined to the steel pipes. It is a member to be joined to the member SP. The joining member 2 is joined to the steel pipe member SP so as to cover the outer periphery of the steel pipe member SP, thereby engaging with the steel pipe member SP in a direction perpendicular to the longitudinal direction LD of the steel pipe member SP, and extending in the longitudinal direction LD. Relative movement with respect to the steel pipe member SP in the vertical direction is suppressed. In addition, the joining member 2 is joined to the steel pipe member SP so as to cover the outer periphery of the steel pipe member SP. Relative movement of the member SP with respect to the steel pipe member SP in the longitudinal direction LD is suppressed. As a result, the reinforcing members BD and HS joined to the joining member 2 are restrained from moving relative to the steel pipe member SP in the longitudinal direction LD and in the direction perpendicular to the longitudinal direction LD. It is possible to suppress the loss of force transmission between them and exert a reinforcing effect on the existing structure. However, the joining member 2 engages with the steel pipe member SP in a direction perpendicular to the longitudinal direction LD at least of the steel pipe member SP, and is restrained from moving relative to the steel pipe member SP in a direction perpendicular to the longitudinal direction LD. Just do it. As will be described in detail below, the shear force resistance member 3 suppresses relative movement of the joint member 2 with respect to the steel pipe member SP in the longitudinal direction LD of the steel pipe member SP. It is not necessary to generate a frictional force (and possibly an adhesive force) between the joining member 2 and the steel pipe member SP for suppressing relative movement with respect to the member SP.

In the first to third embodiments, as shown in FIGS. 3, 8, and 11, the joining member 2 extends along the outer circumference of the steel pipe member SP over substantially the entire circumference in the circumferential direction CD of the steel pipe member SP. By directly contacting the surface, it is joined to the steel pipe member SP so as to cover substantially the entire circumference in the circumferential direction CD of the outer circumference of the steel pipe member SP. The joint member 2 is joined to the steel pipe member SP while covering substantially the entire circumference of the outer circumference of the steel pipe member SP in the circumferential direction CD, so that the distance between the joint member 2 and the steel pipe member SP in the direction perpendicular to the longitudinal direction LD is increased. As the engaging force increases, the frictional force between the joining member 2 and the steel pipe member SP also increases. 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 as a result, the movement between the reinforcing members BD, HS and the steel pipe member SP is reduced. Relative movement is suppressed more. However, if the joining member 2 covers the outer periphery of the steel pipe member SP and is joined to the steel pipe member SP so that 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 is suppressed. For example, the outer circumference of the steel pipe member SP may be joined to the steel pipe member SP so as to cover a part of the outer circumference of the steel pipe member SP in the circumferential direction CD. The outer circumference of the steel pipe member SP may be covered and joined to the steel pipe member SP by indirect contact via another member such as a rubber material that enhances the steel pipe member SP. In the fourth embodiment, as shown in FIGS. 13 to 15, in the joint member 2, a joint collar portion 21d, which will be described later, is attached to the steel pipe member SP over substantially the entire circumference in the circumferential direction CD of the outer circumference of the steel pipe member SP. In addition to being in direct contact with the surface of the outer periphery, a joint sandwiching portion 21a, which will be described later, indirectly contacts the surface of the outer periphery of the steel pipe member SP via the filler 25, and substantially the entirety of the outer periphery of the steel pipe member SP in the circumferential direction CD. It is joined to the steel pipe member SP so as to cover the circumference. However, also in the fourth embodiment, the joining member 2 may be joined to the steel pipe member SP so as to cover a part of the outer circumference of the steel pipe member SP in the circumferential direction CD.

The joining member 2 is joined to the steel pipe member SP so as to at least partially cover the outer circumference of the steel pipe member SP so that relative movement with respect to the steel pipe member SP in the longitudinal direction LD and in a direction perpendicular to the longitudinal direction LD is suppressed. The configuration is not particularly limited. In this embodiment, as shown in FIGS. 1 to 3, FIGS. 7 to 8, FIGS. The embodiment comprises a pair of joining clamping members 21, 21 clamping the steel pipe member SP in the clamping direction SD1) and fixed relative to each other. The pair of joining clamping members 21, 21 are fixed to each other in a state of sandwiching the steel pipe member SP in the clamping direction SD1, so that the steel pipe member SP is arranged so as to cover substantially the entire circumference in the circumferential direction CD of the outer circumference of the steel pipe member SP. Spliced to SP. The pair of joining and clamping members 21, 21 covers substantially the entire circumference of the outer circumference of the steel pipe member SP in the circumferential direction CD, so that the pair of joining and clamping members 21, 21 and the steel pipe member SP in the direction perpendicular to the longitudinal direction LD. As the engagement force between the members SP increases, the frictional force (and possibly the adhesive force) between the pair of joining clamping members 21, 21 and the outer peripheral surface of the steel pipe member SP also increases. As a result, relative movement of the pair of joining and 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. The joining member 2 includes a pair (two) of joining and clamping members 21, 21 in the present embodiment. In order to do so, the present embodiment is not limited as long as at least two joining and clamping members are provided. For example, three or more joining and clamping members arranged side by side along the circumferential direction CD of the steel pipe member SP may be provided.

The material of the joint clamping member 21 is particularly limited as long as it supports at least the reinforcing members BD and HS and has the strength to suppress deformation due to the force received from the steel pipe member SP and the reinforcing members BD and HS. Instead, it can be made of a known steel plate, for example.

In this embodiment, as shown in FIGS. 1 to 3, 7 to 8, 9 to 11 and 13 to 15, the joining clamping member 21 directly or indirectly contacts the surface of the outer circumference of the steel pipe member SP. It is provided with a partially cylindrical joint clamping portion 21a that contacts and a joint flange portion 21b that extends radially outward from an end portion in the circumferential direction CD of the joint clamping portion 21a. At least two (a pair in this embodiment) of the joint clamping members 21, 21 are such that the joint flange portions 21b, 21b of the joint clamping members 21, 21 adjacent to each other in the circumferential direction CD of the steel pipe member SP are connected to the joint flanges. The portions 21b, 21b are joined to the steel pipe member SP by being fixed to each other by fixing members (holding bolts 22 and/or connecting members 24, which will be described later) extending in opposite directions. In the fourth embodiment, the joint clamping member 21 further includes the joint clamping part 21a over substantially the entire circumferential direction CD of the joint clamping part 21a on both sides in the longitudinal direction LD of the joint clamping part 21a across the joint clamping part 21a. A joining collar portion 21d extends substantially perpendicularly to the longitudinal direction LD from the radially inner side to the outer side. When the joint clamping member 21 is joined to the steel pipe member SP, the joint collar portion 21d contacts the outer peripheral surface of the steel pipe member SP, and is surrounded by the joint clamping portion 21a, the joint collar portion 21d, and the outer peripheral surface of the steel pipe member SP. A space filled with the filler 25 is formed in the region (see FIG. 15). The filler 25 is not particularly limited as long as it is a material that can be deformed to follow the shape of the surrounding space when placed in the above-described space and hardens after being placed, and is a known grout. or adhesive can be used, and grout can be preferably used from the viewpoint of cost. The filler 25 is injected from 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.

The joint sandwiching portion 21a is a portion that directly or indirectly abuts on the surface of the outer periphery of the steel pipe member SP and covers a portion of the surface of the outer periphery of the steel pipe member SP in the circumferential direction CD. The joint sandwiching portion 21a directly or indirectly abuts on the surface of the outer periphery of the steel pipe member SP, thereby generating an engaging force with the steel pipe member SP in a direction perpendicular to the longitudinal direction LD of the steel pipe member SP. , and the surface of the outer periphery of the steel pipe member SP. In the first to third embodiments, as shown in FIGS. 3, 8 and 11, the joining clamping portion 21a is arranged so as to directly contact the surface of the outer circumference of the steel pipe member SP. However, the joint clamping portion 21a is formed on the steel pipe member SP so that an engagement force is generated between the steel pipe member SP in the direction perpendicular to the longitudinal direction LD and a frictional force is generated between the steel pipe member SP and the outer peripheral surface of the steel pipe member SP. As long as it abuts against the surface of the outer periphery, it is not limited to the illustrated example, and may be arranged so as to abut indirectly via another member such as a rubber material that increases frictional force. In addition, in the fourth embodiment, as shown in FIG. 15, the joining clamping portion 21a indirectly contacts the surface of the outer periphery of the steel pipe member SP via the filler 25. As shown in FIG. By interposing the filler 25 between the joint clamping portion 21a and the outer peripheral surface of the steel pipe member SP, even if there is unevenness on the outer peripheral surface of the steel pipe member SP, the joint clamping portion 21a and the steel pipe member SP can be connected. It is possible to suppress the formation of gaps with the outer peripheral surface. As a result, the joining clamping portion 21a more reliably engages with the steel pipe member SP in the direction perpendicular to the longitudinal direction LD of the steel pipe member SP, and moves relative to the steel pipe member SP in the direction perpendicular to the longitudinal direction LD. is suppressed.

The joining clamping part 21a is not particularly limited in shape and size as long as it can directly or indirectly contact the surface of the outer circumference of the steel pipe member SP. For example, in the first to third embodiments, the joint clamping portion 21a is formed in a shape and size corresponding to the shape and size of the outer peripheral surface of the steel pipe member SP. More specifically, as shown in FIGS. 1 to 3, 7 to 8, and 9 to 11, the joining clamping portion 21a is substantially half-shaped so as to correspond to the shape of the outer circumference of the substantially cylindrical steel pipe member SP. It is formed in a split cylindrical shape, and the inner peripheral diameter of the joint clamping portion 21a is substantially the same as the outer peripheral diameter of the steel pipe member SP or slightly larger than the outer peripheral diameter of the steel pipe member SP so as to correspond to the outer peripheral size of the steel pipe member SP. It is formed to be For example, in the fourth embodiment, as shown in FIGS. 13 to 15, the joint clamping portion 21a is formed in a substantially half-cylindrical shape so as to correspond to the shape of the outer circumference of the substantially cylindrical steel pipe member SP. The inner peripheral diameter of the joining clamping portion 21a is formed to be larger than the outer peripheral diameter of the steel pipe member SP so that the filler 25 can be filled between the clamping portion 21a and the outer peripheral surface of the steel pipe member SP. In the fourth embodiment, the joining clamping portion 21a is not particularly limited as long as it has an inner diameter larger than the outer diameter of the steel pipe member SP so that the filler 25 can be filled, but will be described later. It is preferably formed and arranged so as to have substantially the same diameter as the resistance clamping portion 31a of the shear force resistance member 3, and be aligned substantially on the same straight line in a cross section along the longitudinal direction LD (see FIG. 15). ). As a result, deformation of the joint member 2 and the shear force resistance member 3 is suppressed when force is transmitted from the joint member 2 to the shear force resistance member 3, and the resistance force of the shear force resistance member 3, which will be described later, is increased. be able to. The joining clamping portion 21a is formed in a substantially half-cylindrical shape in this embodiment, but when the steel pipe member SP is formed in a tubular shape other than a substantially cylindrical shape, it corresponds to the shape of the outer circumference of the steel pipe member SP. It may be formed in a substantially half-cylinder shape. In addition, the joining clamping portion 21a is not limited to a substantially half-cylinder shape as long as it can cover a part of the outer peripheral surface of the steel pipe member SP in the circumferential direction CD, and is not limited to a 1/3-cylinder shape or a 2/3-cylinder shape. It may be formed in a partial cylindrical shape such as a 3-part cylindrical shape. Also, the joint clamping portion 21a may be formed in a size such that a gap is generated between the joint clamping portions 21a, 21a when the steel pipe member SP is sandwiched in the clamping direction SD1 together with the other joint clamping portion 21a. good.

The joint flange portion 21b is fixed to the joint flange portion 21b of another joint clamping member 21 adjacent in the circumferential direction CD of the steel pipe member SP, so that the joint flange portion 21b is fixed to the joint clamping member 21 adjacent in the circumferential direction CD of the steel pipe member SP. , 21 are fixed together. The joining flange portion 21b is, in this embodiment, substantially perpendicular to both the longitudinal direction LD and the pinching direction SD1, as shown in FIGS. It is formed in a plate shape so as to extend radially outward from both ends in the circumferential direction CD of the joining clamping portion 21a along the direction. In addition, if the joint flange portion 21b is formed to extend radially outward from the end portion of the joint clamping portion 21a in the circumferential direction CD, the extending direction is oriented in both the longitudinal direction LD and the clamping direction SD1. It is not limited to the substantially vertical direction, and can be modified as appropriate according to the arrangement of the joint flange portion 21b of the separate joint clamping member 21 to be fixed.

Here, the reinforcing members BD and HS to be joined to the joining member 2 may be joined to the joining member 2 so as to reinforce the existing structure, and the joining position and method are not particularly limited. In this embodiment, the reinforcing members BD, HS are joined to the joining flange portion 21b of the joining clamp member 21 as shown in FIGS. 1-3, 7, 8, 9, 11 and 13.

In the joint structure 1 of the first and second embodiments in which the brace BD, which is a reinforcing member, is joined to the joint member 2, as shown in FIGS. However, the brace BD is joined to the joint member 2 by being fixed by a fixing means such as a bolt while being sandwiched between the joint flange portions 21b, 21b adjacent to each other. In the first and second embodiments, as shown in FIGS. 1 and 7, four braces BD are joined to the joint member 2, and each brace BD is inclined with respect to the longitudinal direction LD (first and a direction inclined by 45° in the second embodiment). One end of each brace BD is arranged on both sides (in FIGS. 1 and 7, The joint flange portions 21b, 21b on the left and right sides) are joined adjacent to the ends of the joint flange portions 21b on both sides in the longitudinal direction LD (upper and lower sides in FIGS. 1 and 7), respectively. . Also, the other end of each brace BD is joined to another member (steel pipe member SP, etc.) of the existing structure via another joint structure (joint structure 1, etc.). However, the number and arrangement of braces BD can be appropriately modified according to the structure of the existing structure to be reinforced. Also, the brace BD may be joined to another portion of the joint flange portion 21b, or may be joined to another portion of the joint member 2 other than the joint flange portion 21b.

In the joint structure 1 of the third and fourth embodiments in which the H-section steel HS as a reinforcing member is joined to the joint member 2, as shown in FIGS. The web portion of the connecting member CM2 having a substantially T-shaped cross section fixed by welding or the like to the flange portion of is sandwiched between the adjacent joining flange portions 21b, 21b and fixed by a fixing means such as a bolt. Thus, the H-section steel HS is joined to the joining member 2 . In the third and fourth embodiments, the H-section 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-section steel HS is longitudinally connected via the connecting member CM2. It is joined to the joining flange portion 21b on one side (the right side in FIGS. 9 and 11) of the joining clamping portion 21a in the direction perpendicular to both the direction LD and the clamping direction SD1 (horizontal direction in FIGS. 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. Also, the H-section steel HS may be joined to another portion of the joint flange portion 21b, or may be joined to another portion of the joint member 2 other than the joint flange portion 21b.

At least two (one pair in this embodiment) of the joint clamping members 21, 21 are fixed members in which the adjacent joint flange portions 21b, 21b extend in the direction in which the joint flange portions 21b, 21b face each other, as described above. They are fixed relative to each other by being fixed by (clamping bolts 22 and/or connecting members 24). Fixing members (clamping bolts 22 and/or connecting members 24) for at least two (in this embodiment a pair) joining clamping members 21, 21 are shown in FIGS. As shown in FIGS. 13 and 14, the joint flange portions 21b, 21b of the joint clamping members 21, 21 adjacent in the circumferential direction CD of the steel pipe member SP are separated from each other by the force received from the reinforcing members BD, HS. It is preferable that the steel pipe member SP is radially adjacent to the steel pipe member SP so as to prevent the gap from expanding (in the vertical direction in FIGS. 3, 8, 11 and 14). When the joining clamping members 21, 21 receive a tensile force from the reinforcing members BD, HS in a direction perpendicular to the longitudinal direction LD (horizontal direction in FIGS. 3 and 8, rightward direction in FIGS. 11 and 13), , the joint clamping portions 21a, 21a formed in a partial cylindrical shape are subjected to a stress that tends to deform them into a flat plate shape, and the joint flange portions 21b, 21b fixed to each other (FIG. 3, FIG. 8, FIG. 11 and vertically in FIG. 14) to be forced apart from each other. When the space between the joint flange portions 21b, 21b is widened due to such stress, the pressure between the joint clamping portions 21a, 21a (and the joint flange portions 21d, 21d) and the outer peripheral surface of the steel pipe member SP increases. Gaps may occur. In this embodiment, the joint flange portions 21b, 21b are fixed to each other by fixing members (sandwiching bolts 22 and/or connecting members 24) arranged adjacent to the steel pipe member SP in the radial direction. The widening of the space between 21b, 21b is suppressed, and the generation of gaps between the joining clamping portions 21a, 21a (and joining collar portions 21d, 21d) and the outer peripheral surface of the steel pipe member SP is suppressed. As a result, it is possible to suppress a decrease in the engaging force between the joining clamping portions 21a, 21a (and joining collar portions 21d, 21d) and the steel pipe member SP in the direction perpendicular to the longitudinal direction LD of the steel pipe member SP. , it is possible to suppress a decrease in frictional force (and adhesive force in some cases) between the joining clamping portions 21a, 21a (and joining flange portions 21d, 21d) and the outer peripheral surface of the steel pipe member SP.

The fixing member (the clamping bolt 22 and/or the connecting member 24) is not particularly limited as long as it is arranged adjacent to the steel pipe member SP in the radial direction of the steel pipe member SP. More preferably, the end portion on the side of the member SP is preferably located within a range of 1/10 or less of the radial length of the steel pipe member SP from the radial end portion of the steel pipe member SP. Positioned within a range 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, more preferably so as to be in contact with the joint clamping portion 21a. , are arranged adjacent to the steel pipe member SP.

As the fixing member, for example, as in the joint structures 1 of the first, third and fourth embodiments shown in FIGS. Clamping bolts 22 extending in opposite directions can be used. The clamping bolt 22 extends in the direction in which the joint flange portions 21b, 21b face each other, passes through the joint flange portions 21b, 21b, and fixes the joint flange portions 21b, 21b to each other. The clamping bolt 22 is arranged on the surface of the joint flange portion 21b in the joint structures 1 of the first, third and fourth embodiments, as shown in FIGS. It is fixed to the joining flange portion 21b via the clamping washer 23. As shown in FIG. By fixing the clamping bolt 22 to the joint flange portion 21 b via the clamping washer 23 , the range in which the tightening force of the clamping bolt 22 acts can be expanded to the area range of the clamping washer 23 . Widening of the interval between the portions 21b, 21b is further suppressed.

The clamping bolt 22 is not particularly limited as long as it is arranged adjacent to the steel pipe member SP in the radial direction of the steel pipe member SP. from the radial end of the steel pipe member SP, more preferably from the radial end of the steel pipe member SP It is arranged adjacent to the steel pipe member SP so as to be positioned within a length range of ⅓ or less of the radial length of the SP. The clamping washer 23 is appropriately arranged according to the position where the clamping bolt 22 is arranged. , more preferably from the radial end of the steel pipe member SP so as to be within a range of 1/10 or less of the radial length of the steel pipe member SP. It is arranged adjacent to the steel pipe member SP so as to be positioned within a length range of 1/20 or less of the length, and more preferably so as to contact the joining clamp 21a. In this specification, the clamping bolt 22 is shown as being provided on the joint member 2 in the first, third and fourth embodiments, but Like the joint member 2, it may be provided in the joint member 2 in the second embodiment.

As the fixing member, a connection member 24 (such as a washer) extending in the direction in which the joint flange portions 21b and 21b face each other can be used as in the joint structure 1 of the second embodiment shown in FIGS. can also As shown in FIGS. 7 and 8, the connection member 24 extends in the direction in which the joint flange portions 21b, 21b face each other, penetrates through the joint flange portions 21b, 21b, and extends to the joint flange portions 21b, 21b. By connecting the rib plates 21c to each other, the joint flange portions 21b, 21b are fixed to each other. As shown in FIG. 7, the connection members 24 are arranged on both sides of the rib plate 21c in the longitudinal direction LD so as to sandwich the rib plate 21c in the longitudinal direction LD. 8, one (upper in FIG. 8) end in the extending direction of the connecting member 24 is a rib plate 21c provided on one (upper in FIG. 8) joining flange 21b. is fixed by a fixing means such as a bolt, and the other (lower in FIG. 8) end in the extending direction of the connecting member 24 is a rib provided on the other (lower in FIG. 8) joining flange 21b It is fixed to the plate 21c by fixing means such as bolts.

The connection member 24 is not particularly limited as long as it is arranged adjacent to the steel pipe member SP in the radial direction of the steel pipe member SP. from the radial end of the steel pipe member SP so as to be within a length range of 1/10 or less of the radial length of the steel pipe member SP, more preferably from the radial end of the steel pipe member SP , is positioned adjacent to the steel pipe member SP so as to be positioned within a length range of 1/20 or less of the radial length of the steel pipe member SP, and more preferably so as to be in contact with the joint clamping portion 21a. be. In this specification, the connection member 24 is shown as being provided in the joint member 2 in the second embodiment, but similarly to the joint member 2 in the second embodiment, the first, third and It may be provided in the joint member 2 in the fourth embodiment.

In the joining member 2, substantially perpendicular to the longitudinal direction LD, like the joining structure 1 of the first to third embodiments shown in FIGS. A rib plate 21c extending in the opposite direction to the steel pipe member SP may be provided. Since the joint member 2 is provided with the rib plate 21c extending substantially perpendicularly to the longitudinal direction LD, deformation in the extending direction of the rib plate 21c is suppressed, and the joint strength to the steel pipe member SP can be increased. In the first to third embodiments, the rib plate 21c is provided as a part of the joint clamping member 21 and extends substantially perpendicularly to the longitudinal direction LD from the surfaces of the joint clamping portion 21a and the joint flange portion 21b. . As a result, when the joint clamping members 21, 21 receive a tensile force perpendicular to the longitudinal direction LD from the reinforcing members BD, HS, deformation of the joint clamping portion 21a is suppressed and they are fixed to each other. Widening of the space between the joint flange portions 21b, 21b is suppressed, and the occurrence of gaps between the joint sandwiching portions 21a, 21a (and the joint flange portions 21d, 21d) and the outer peripheral surface of the steel pipe member SP is prevented. Suppressed. As a result, a decrease in the engagement force between the joint member 2 and the steel pipe member SP in the direction perpendicular to the longitudinal direction LD of the steel pipe member SP is suppressed, and the joining force to the steel pipe member SP in the direction perpendicular to the longitudinal direction LD is suppressed. Relative movement of the member 2 is suppressed. In addition, a decrease in the frictional force (and adhesive force in some cases) between the joining member 2 and the outer peripheral 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. be done. In the fourth embodiment, as shown in FIGS. 13 to 15, a joint pinching member 21 of the joint member 2 is provided with a joint collar portion 21d. has the function of However, the joint member 2 of the fourth embodiment may also be provided with the above-described rib plate 21c, like the joint member 2 of the joint structure 1 of the first to third embodiments.

As shown in FIGS. 1, 2, 7, 9, 10 and 13 to 15, the shear force resistance member 3 is arranged to abut on the joint member 2 in the longitudinal direction LD of the steel pipe member SP. It is joined to the steel pipe member SP so as to cover the outer periphery of the member SP. The shear force resistance member 3 is joined to the steel pipe member SP so as to cover the outer periphery of the steel pipe member SP, so that the frictional force and/or adhesive force generated between the shear force resistance member 3 and the steel pipe member SP causes the longitudinal Relative movement with respect to the steel pipe member SP in the direction LD is suppressed. The shear force resistance member 3, whose relative movement in the longitudinal direction LD is suppressed, is arranged so as to contact the joint member 2 in the longitudinal direction LD, thereby resisting the shear force in the longitudinal direction LD received from the joint member 2, The relative movement of the joining member 2 with respect to the steel pipe member SP in the longitudinal direction LD is suppressed. In this embodiment, the shear force resistance member 3 is arranged so as to directly contact the joint member 2 in the longitudinal direction LD of the steel pipe member SP, but the joint member 2 is relative to the steel pipe member SP in the longitudinal direction LD. As long as movement can be suppressed, it is not limited to this embodiment, and may be arranged so as to indirectly abut on the joining member 2 via another member.

In the first to third embodiments, as shown in FIGS. 4 and 12, the shear force resistance member 3 is directly attached to the surface of the steel pipe member SP over substantially the entire circumference in the circumferential direction CD of the outer circumference of the steel pipe member SP. By coming into contact with each other, they are joined to the steel pipe member SP so as to cover substantially the entire circumference in the circumferential direction CD of the outer circumference of the steel pipe member SP. The shear force resistance member 3 covers substantially the entire circumference of the outer circumference of the steel pipe member SP in the circumferential direction CD and is joined to the steel pipe member SP, thereby increasing the frictional force between the shear force resistance member 3 and the steel pipe member SP. As a result, 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 limited to this embodiment as long as it covers the outer periphery of the steel pipe member SP and is joined to the steel pipe member SP so that relative movement with respect to the steel pipe member SP in the longitudinal direction LD is suppressed. For example, the steel pipe member SP may be joined to the steel pipe member SP so as to cover a part of the outer circumference of the steel pipe member SP in the circumferential direction CD. It may be joined to the steel pipe member SP in indirect contact via the member. Further, in the fourth embodiment, as shown in FIGS. 13 to 15, the shear force resistance member 3 has a resistance flange 31d, which will be described later, along substantially the entire circumference in the circumferential direction CD of the outer circumference of the steel pipe member SP. While directly or indirectly contacting the surface of the outer circumference of the steel pipe member SP, the resistance sandwiching part 31a described later indirectly contacts the surface of the steel pipe member SP via the adhesive 34, and the outer circumference of the steel pipe member SP. It is joined to the steel pipe member SP so as to cover substantially the entire circumference in the circumferential direction CD. By joining the shear force resistance member 3 to the steel pipe member SP while covering substantially the entire circumference of the outer circumference of the steel pipe member SP in the circumferential direction CD, frictional force and/or force between the shear force resistance member 3 and the steel pipe member SP The adhesive force becomes greater, and relative movement between the shear force resistance member 3 and the steel pipe member SP in the longitudinal direction LD is further suppressed. However, also in the fourth embodiment, the shear force resistance member 3 may be joined to the steel pipe member SP so as to cover a part of the outer circumference of the steel pipe member SP in the circumferential direction CD. Also in the first to third embodiments, the shear force resistance member 3 may be joined to the steel pipe member SP via the adhesive 34.

Even if the joining member 2 receives a tensile force along the longitudinal direction LD from the reinforcing members BD, HS, the frictional force (and optionally the adhesive force) between the joining member 2 and the steel pipe member SP and the shear force resistance The frictional force between the member 3 and the steel pipe member SP and/or the adhesive force between the shear force resisting member 3 and the steel pipe member SP suppress the relative movement with respect to the steel pipe member SP in the longitudinal direction LD. In addition, as described above, the joining member 2 receives a tensile force perpendicular to the longitudinal direction LD from the reinforcing members BD and HS, and the frictional force (and, in some cases, the adhesion force) between the joining member 2 and the steel pipe member SP. Frictional forces between the shear force resisting member 3 and the steel pipe member SP to which the reinforcing members BD, HS are not joined and/or adhesion between the shear force resisting member 3 and the steel pipe member SP, even if the force) is reduced. The force suppresses relative movement with respect to the steel pipe member SP in the longitudinal direction LD. That is, even if there is not sufficient frictional force (and possibly adhesive force) between the joining member 2 and the steel pipe member SP, the friction and/or shear forces between the shear force resisting member 3 and the steel pipe member SP The adhesive force between the force resisting member 3 and the steel pipe member SP suppresses relative movement of the joint member 2 with respect to 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 are prevented from moving relative to the steel pipe member SP in the longitudinal direction LD, thereby suppressing loss in force transmission with the steel pipe member SP. and can exert a reinforcing effect on the existing structure.

According to the joining structure 1 of the present embodiment, as described above, apart from the joining member 2 to which the reinforcing members BD and HS are joined, the shear force is applied so as to contact the joining member 2 in the longitudinal direction LD of the steel pipe member SP. By arranging the resistance member 3, the reinforcing members BD and HS can be firmly joined to the steel pipe member SP. The HS can be easily joined to the steel pipe member SP.

1, 2, 7, 9, 10, and 13, 14, the shear force resistance members 3, 3 are formed of steel pipes on both sides of the joining member 2 in the longitudinal direction LD. It is joined to the member SP. By providing the shear force resistance members 3, 3 on both sides of the joint member 2 in the longitudinal direction LD in this manner, relative movement of the joint member 2 to both sides in the longitudinal direction LD is suppressed. For example, in the joint structures 1 of the first and second embodiments shown in FIGS. 1, 2 and 7, two braces BD are joined to each of both sides of the joint member 2 in the longitudinal direction LD. For example, when the joint member 2 receives a tensile force from two braces BD on one side in the longitudinal direction LD (the upper side in FIGS. 1, 2 and 7), the joint member 2 receives a tensile force to one side in the longitudinal direction LD. Relative movement to the one side in the longitudinal direction LD is suppressed by the shear force resistance member 3 arranged on the one side in the longitudinal direction LD. Also, when the joint member 2 receives a tensile force from the two braces BD on the other side in the longitudinal direction LD (the lower side in FIGS. 1, 2 and 7), it receives a tensile force in the other side in the longitudinal direction LD. However, relative movement to the other side in the longitudinal direction LD is suppressed by the shear force resistance member 3 arranged on the other side in the longitudinal direction LD. In the case of the joint structures 1 of the third and fourth embodiments shown in FIGS. 9 and 10 and FIGS. 13 and 14, the joint member 2 relative movement to both sides in the longitudinal direction LD is suppressed. However, the shear force resistance member 3 may be joined to the steel pipe member SP in either one of the longitudinal directions LD in which the relative movement of the joining member 2 needs to be suppressed, depending on the arrangement of the reinforcing members BD and HS.

A pair of shear force resistance members 3, 3 joined to the steel pipe member SP on both sides in the longitudinal direction LD with the joining member 2 interposed therebetween are first to third members shown in FIGS. As in the joint structure 1 of the embodiment, it is preferable that they are connected to each other by connecting bolts 33 extending in the longitudinal direction LD so that relative movement in the directions separating them from each other in the longitudinal direction LD is suppressed. In the first to third embodiments, the pair of shear force resistance members 3, 3 are configured such that the rib plates 31c, 31c of the resistance clamping members 31, 31, which will be described later, of the pair of shear force resistance members 3, 3 are connected to each other by connecting bolts 33. are connected to each other by being connected by In the first to third embodiments, the connecting bolt 33 connects the rib plates 31c, 31c of the shear force resistance members 3, 3 on both sides. The plurality of rib plates 31c, 31c may be penetrated to connect the plurality of rib plates 31c, 31c. In addition, in the first to third embodiments, the connecting bolt 33 is fixed by two nuts provided outside the longitudinal direction LD of the opposing rib plates 31c, 31c. It may be fixed by a nut sandwiched in the direction LD. In addition, in the first to third embodiments, the connecting bolt 33 directly connects the shear force resistance members 3, 3 on both sides. By connecting the rib plates 31 c and 31 c to the rib plates 21 c and 21 c of the joint member 2 , the shear force resistance members 3 and 3 on both sides may be indirectly connected via the joint member 2 . In addition, the pair of shear force resistance members 3, 3 may be connected to each other so as to suppress relative movement in directions away from each other in the longitudinal direction LD. may be connected to each other via Although the joint structure 1 of the fourth embodiment is not provided with the above-described connecting bolt 33, the pair of shear force resistance members 3, 3 are provided in the same manner as the joint structure 1 of the first to third embodiments. Connecting bolts 33 may be provided to connect with each other. In that case, the configuration described above in relation to the connecting bolt 33 is also applied to the joint structure 1 of the fourth embodiment.

The pair of shear force resistance members 3, 3 are restrained from moving relative to each other in the longitudinal direction LD, thereby further restraining the joint member 2 from moving relative to the steel pipe member SP in the longitudinal direction LD. be able to. 1 and 2, the joint structure 1 of the first embodiment shown in FIGS. When a tensile force to one side in the longitudinal direction LD is received from the brace BD, a shear force to one side in the longitudinal direction LD is applied to the one-side shear force resistance member 3 arranged on one side in the longitudinal direction LD. introduce. The shear force resistance member 3 on one side is arranged on the other side (lower side in FIGS. 1 and 2) of the longitudinal direction LD, which is connected to each other in the longitudinal direction LD. to the shear force resistance member 3 on the side. As a result, the pair of shear force resistance members 3, 3 provided on both sides in the longitudinal direction LD can resist the shearing force received from the joining member 2. Relative movement with respect to the steel pipe member SP can be further suppressed. Similarly, when the joint member 2 receives a tensile force toward the other side of the longitudinal direction LD from two braces BD on the other side of the longitudinal direction LD (lower side in FIGS. 1 and 2), Both of the pair of shear force resistance members 3, 3 provided in the joint member 2 can resist the shear force received from the joint member 2. The same applies to the joint structure 1 of the second and third embodiments shown in FIGS. 7, 9 and 10, and also when the joint structure 1 of the fourth embodiment is provided with the connecting bolt 33. can say.

The shear force resistance member 3 may be joined to the steel pipe member SP so as to at least partially cover the outer circumference of the steel pipe member SP so as to suppress relative movement with respect to the steel pipe member SP in the longitudinal direction LD. It is not particularly limited. In the first to third embodiments, the shear force resisting member 3 is substantially perpendicular to the longitudinal direction LD of the steel pipe member SP, as shown in FIGS. 1, 2, 4, 7 and 9, 10, 12. It comprises a pair of resistive clamping members 31, 31 which clamp the steel pipe member SP in a direction (the clamping direction SD2 in this embodiment) and which are fixed relative to each other. The pair of resistance sandwiching members 31, 31 are fixed to each other in a state of sandwiching the steel pipe member SP in the sandwiching direction SD2, so that the steel pipe member SP is arranged so as to cover substantially the entire circumference in the circumferential direction CD of the outer circumference of the steel pipe member SP. Spliced to SP. Since the pair of resistance clamping members 31, 31 cover substantially the entire circumference of the outer circumference of the steel pipe member SP in the circumferential direction CD, the frictional force between the pair of resistance clamping members 31, 31 and the surface of the outer circumference of the steel pipe member SP is reduced. becomes larger, and 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 is further suppressed. In addition, in the fourth embodiment, as shown in FIGS. 14 and 15, the shear force resistance member 3 is arranged in a direction substantially perpendicular to the longitudinal direction LD of the steel pipe member SP (the sandwiching direction SD2 in this embodiment). A pair of resistance clamping members 31, 31 fixed to the steel pipe member SP with the SP sandwiched therebetween is provided. The pair of resistance sandwiching members 31, 31 are fixed to the steel pipe member SP via an adhesive 34 in a state of sandwiching the steel pipe member SP in the sandwiching direction SD2, thereby covering substantially the entire outer periphery of the steel pipe member SP in the circumferential direction CD. It is joined to the steel pipe member SP so as to cover the circumference. Since the pair of resistance clamping members 31, 31 cover substantially the entire circumference of the outer circumference of the steel pipe member SP in the circumferential direction CD, the frictional force between the pair of resistance clamping members 31, 31 and the surface of the outer circumference of the steel pipe member SP is reduced. And/or the adhesive force becomes greater, and 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 is further suppressed. In the fourth embodiment, the pair of resistance clamping members 31, 31 are fixed relative to each other via a joint plate 35, but are joined to the steel pipe member SP via an adhesive 34, as shown in FIG. are not necessarily fixed relative to each other. Note that the shear force resistance member 3 includes a pair (two) of resistance clamping members 31, 31 in this embodiment, but the steel pipe member SP is not limited to the clamping direction SD2 and is substantially perpendicular to the longitudinal direction LD. is not limited to this embodiment as long as at least two resistance clamping members are provided for clamping the steel pipe member SP, for example, three or more resistors arranged side by side along the circumferential direction CD A clamping member may be provided. Further, the sandwiching direction SD2 of the pair of resistance sandwiching members 31, 31 is substantially parallel to the sandwiching direction SD1 of the pair of joint sandwiching members 21, 21 in the first, second and fourth embodiments, and in the third embodiment Although it is substantially perpendicular to the sandwiching direction SD1 of the pair of joining sandwiching members 21, 21, it is not particularly limited, and can be modified as appropriate according to the arrangement of the adjacent members.

The material of the resistive clamping member 31 is not particularly limited as long as it has strength enough to suppress deformation due to the shearing force received from the joining member 2, and can be formed of, for example, a known steel plate.

1, 2, 4, 7 and 9, 10, 12 in the first to third embodiments, the resistance clamping member 31 is directly or indirectly attached to the surface of the outer circumference of the steel pipe member SP. It is provided with a partially cylindrical resistance clamping portion 31a that abuts against the resistance clamping portion 31a, and a resistance flange portion 31b that extends radially outward from an end portion of the resistance clamping portion 31a in the circumferential direction CD. At least two (one pair in the first to third embodiments) of the resistance clamping members 31, 31 are formed by mutually opposing resistance flange portions 31b, 31b of the resistance clamping members 31, 31 adjacent in the circumferential direction CD of the steel pipe member SP. However, the resistance flange portions 31b, 31b are fixed to each other by clamping bolts 32 extending in opposite directions, thereby being joined to the steel pipe member SP. In addition, in the fourth embodiment, as shown in FIGS. 13 to 15, the resistance clamping member 31 includes a partially cylindrical resistance clamping portion 31a that indirectly abuts on the surface of the outer circumference of the steel pipe member SP, and a resistance clamping portion On both sides of the resistance clamping portion 31a in the longitudinal direction LD across the resistance clamping portion 31a, from the inside to the outside in the radial direction of the resistance clamping portion 31a over substantially the entire circumferential direction CD of the resistance clamping portion 31a, approximately with respect to the longitudinal direction LD. and a vertically extending resistance flange 31d. When the resistance pinching member 31 is joined to the steel pipe member SP, the resistance flange portion 31d contacts the outer peripheral surface of the steel pipe member SP, and is surrounded by the resistance pinching portion 31a, the resistance flange portion 31d, and the outer peripheral surface of the steel pipe member SP. A space is formed in the region in which the adhesive 34 is filled (see FIG. 15). The resistance clamping member 31 is joined to the steel pipe member SP by filling the formed space with an adhesive 34 . In the fourth embodiment, before the resistance clamping member 31 is attached to the steel pipe member SP, the space corresponding to the space defined by the resistance clamping portion 31a and the resistance collar portion 31d is filled with the adhesive 34, and then , the resistance clamping member 31 is attached to the steel pipe member SP. In the fourth embodiment, at least two (one pair in the fourth embodiment) resistor sandwiching members 31, 31 are adhered so as to straddle the corresponding resistor flanges 31d, 31d, as shown in FIG. They are fixed to each other by joint plates 35 . The shear force resistance member 3 is formed by fixing at least two (one pair in the fourth embodiment) resistance clamping members 31, 31 to each other, so that the shear force resistance member 3 can receive a force along the longitudinal direction LD from the joint member 2. Since the resistance clamping members 31, 31 are further suppressed from separating from the steel pipe member SP when receiving the force, a greater resistance to the shearing force received from the joining member 2 can be exhibited. The resistance clamping members 31, 31 may be fixed to each other by a stainless steel belt that goes around the entire circumference of the corresponding resistance clamping portions 31a, 31a, or may be fixed to each other by an adhesive.

The resistance sandwiching part 31a is a part that directly or indirectly abuts on the surface of the outer periphery of the steel pipe member SP and covers a part of the surface of the outer periphery of the steel pipe member SP in the circumferential direction CD. The resistance clamping part 31a directly or indirectly abuts on the outer peripheral surface of the steel pipe member SP, thereby generating a frictional force with the outer peripheral surface of the steel pipe member SP. In the first to third embodiments, as shown in FIGS. 4 and 12, the resistance clamping portion 31a is arranged so as to be in direct contact with the surface of the outer periphery of the steel pipe member SP. However, the resistance clamping portion 31a is not limited to the illustrated example as long as it abuts against the outer peripheral surface of the steel pipe member SP so as to generate a frictional force with the outer peripheral surface of the steel pipe member SP. It may be arranged so as to be in indirect contact via another member such as a rubber material that enhances the frictional force. Further, in the fourth embodiment, the resistance clamping portion 31a is adhered to the outer peripheral surface of the steel pipe member SP via an adhesive 34, as shown in FIG. Thereby, an adhesive force is generated between the resistance clamping portion 31a and the outer peripheral surface of the steel pipe member SP.

The resistance clamping portion 31a is not particularly limited in shape and size as long as it can directly or indirectly contact the surface of the outer periphery of the steel pipe member SP. For example, in the first to third embodiments, the resistance clamping portion 31a is formed in a shape and size corresponding to the shape and size of the outer peripheral surface of the steel pipe member SP. More specifically, as shown in FIGS. 4 and 12, the resistance clamping portion 31a is formed in a substantially half-cylindrical shape so as to correspond to the shape of the outer circumference of the substantially cylindrical steel pipe member SP. The inner peripheral diameter of the resistance clamping portion 31a is formed to be substantially the same as or slightly larger than the outer peripheral diameter of the steel pipe member SP so as to correspond to the size of the outer periphery of the SP. For example, in the fourth embodiment, as shown in FIGS. 13 to 15, the resistance clamping portion 31a is formed in a substantially half-cylindrical shape so as to correspond to the shape of the outer periphery of the substantially cylindrical steel pipe member SP. The inner peripheral diameter of the resistance clamping portion 31a is formed to be larger than the outer peripheral diameter of the steel pipe member SP so that the adhesive 34 can be filled between the clamping portion 31a and the outer peripheral surface of the steel pipe member SP. In the fourth embodiment, the resistance holding portion 31a is not particularly limited as long as it has an inner diameter larger than the outer diameter of the steel pipe member SP so that the adhesive 34 can be filled. It is preferable that it has substantially the same diameter as the joining clamping portion 21a of the member 2, and is formed and arranged so as to be aligned substantially on the same straight line in a cross section along the longitudinal direction LD (see FIG. 15). Thereby, when force is transmitted from the joint member 2 to the shear force resistance member 3, the deformation of the joint 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 sandwiching portion 31a is formed in a substantially half-cylindrical shape. It may be formed in a substantially half-cylinder shape. Further, the resistance sandwiching portion 31a is not limited to a substantially half-split tubular shape as long as it can cover a part of the outer circumference of the steel pipe member SP in the circumferential direction CD, and is not limited to a 1/3 split tubular shape or a 2/3 split tubular shape. It may be formed in a partially cylindrical shape such as a cylindrical shape. Further, the resistance clamping portion 31a may be formed in a size such that a gap is generated between the resistance clamping portions 31a, 31a when the steel pipe member SP is sandwiched in the clamping direction SD2 together with the other resistance clamping portion 31a. good.

In the first to third embodiments, the resistance flange portion 31b is fixed to the resistance flange portion 31b of another resistance sandwiching member 31 adjacent in the circumferential direction CD of the steel pipe member SP, thereby This is a portion for fixing the resistance clamping members 31, 31 adjacent in the direction CD. 1, 2, 4, 7 and 9, 10, 12, in the first to third embodiments, the resistance flange portion 31b is substantially parallel to both the longitudinal direction LD and the pinching direction SD2. It is formed in a plate shape so as to extend radially outward from both ends of the resistance sandwiching portion 31a in the circumferential direction CD along the vertical direction. If the resistance flange portion 31b is formed so as to extend radially outward from the end portion of the resistance clamping portion 31a in the circumferential direction CD, the direction in which the resistance flange portion 31b extends is relative to both the longitudinal direction LD and the clamping direction SD2. It is not limited to the substantially vertical direction, and can be modified as appropriate according to the arrangement of the resistance flange portion 31b of another fixed resistance clamping member 31. FIG. Although the resistance clamping member 31 of the joint structure 1 of the fourth embodiment is not provided with the resistance flange portion 31b described above, the resistance flange portion 31b is provided in the same manner as the joint structure 1 of the first to third embodiments. may be provided. 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.

Here, in the first to third embodiments, the shear force resistance member 3 is preferably joined to the steel pipe member SP so that the frictional force between the steel pipe member SP and the steel pipe member SP becomes as large as possible. , the steel pipe member SP is preferably joined to the steel pipe member SP in such a manner that the frictional force (and possibly the adhesive force) between the joining member 2 and the steel pipe member SP is greater. By doing so, 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 FIG. The resistance pinching members 31, 31 of at least two resistance pinching members 31, 31 directly or indirectly come into contact with the outer peripheral surface of the steel pipe member SP. The resistance flange portions 31b, 31b of the resistance pinching members 31, 31 which are adjacent in the circumferential direction CD of the steel pipe member SP in a state before being fixed to each other by the pinching bolts 32 even though they are arranged so as to be in contact with each other. It is formed so that a gap G is generated between them. Then, as shown in FIG. 5(b), the at least two resistance clamping members 31, 31 extend in the direction substantially perpendicular to the longitudinal direction LD (the clamping direction SD2 in the first to third embodiments). are clamped to apply a compressive force to the steel pipe member SP. It is joined to the steel pipe member SP. As a result, the clamping force of the resistance clamping members 31, 31 on the steel pipe member SP is increased, and the frictional force between the resistance clamping members 31, 31 and the steel pipe member SP can be further increased. Note that the above configuration can also be applied when the resistance clamping member 31 of the joint structure 1 of the fourth embodiment is provided with the resistance flange portion 31b.

In addition, in the present embodiment, for the purpose of increasing the frictional force or adhesive force between the shear force resistance member 3 and the steel pipe member SP, the joint location SP1 of the steel pipe member SP to which the shear force resistance member 3 is joined (See FIG. 6) may have a large surface roughness. Thereby, the frictional force or adhesive force between the shear force resistance member 3 and the steel pipe member SP can be increased, and the relative movement of the joint member 2 in the longitudinal direction LD can be further suppressed. Furthermore, by increasing the surface roughness of the surface 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 becomes equal to the surface roughness of the steel pipe member to which the joint member 2 is joined. It may be larger than the surface roughness of the surface of the joint SP2 (see FIG. 6) of SP. 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 shearing force resistance member 3 and the steel pipe member SP, so that the joining member 2 and the shearing force resistance member 3 are separated from each other by the steel pipe. Since the joining member 2 slides easily with respect to the steel pipe member SP in the longitudinal direction LD when joining to the member SP, the joining member 2 can be easily positioned with respect to the steel pipe member SP.

1, 2, 4, 7 and 9, 10, 12, the shear force resistance member 3 includes a steel pipe substantially perpendicular to the longitudinal direction LD in the first to third embodiments. A rib plate 31c may be provided that extends on the side opposite to the member SP. Since the shear force resistance member 3 is provided with the rib plate 31c extending substantially perpendicularly to the longitudinal direction LD, deformation in the extending direction of the rib plate 31c is suppressed, and the bonding strength 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 perpendicularly 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 pinching members 31, 31 are formed so that the gap G is provided between the resistance flange portions 31b, 31b before being fixed to each other. Therefore, when they are fixed to each other by the clamping bolts 32, a bending stress is generated in a direction substantially perpendicular to the longitudinal direction LD. Since the rib plate 31c resists such bending stress, deformation of the resistance pinching members 31, 31 is suppressed when the resistance pinching members 31, 31 are fixed to each other, and the resistance pinching portions 31a, 31a and the steel pipe are prevented from being deformed. A decrease in the frictional force with the outer peripheral surface of the member SP is suppressed. In the fourth embodiment, as shown in FIGS. 13 to 15, the resistance clamping member 31 of the shear force resistance member 3 is provided with a resistance collar portion 31d. has the same function as However, the shear force resistance member 3 in the fourth embodiment may also be provided with the above-described rib plate 31c, like the shear force resistance member 3 in the joint structure 1 in the first to third embodiments.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. It should be noted that the above-described embodiment mainly describes an invention having the following configuration.

(1) A joint structure for joining a reinforcing member to a steel pipe member of an existing structure,
a joining member that is joined to the steel pipe member so as to cover the outer periphery of the steel pipe member and to which the reinforcing member is joined;
a shear force resistance member joined to the steel pipe member so as to cover the outer periphery of the steel pipe member;
A joint structure in which the shear force resistance member is arranged so as to directly or indirectly contact the joint member in the longitudinal direction of the steel pipe member.

(2) The shear force resistance member is joined to the steel pipe member on both sides in the longitudinal direction with the joining member interposed therebetween.
(1) The joint structure as described in.

(3) A pair of shear force resistance members joined to the steel pipe member on both sides in the longitudinal direction with the joining member interposed therebetween is configured such that relative movement with respect to each other in directions separating from each other in the longitudinal direction is suppressed. , connected to each other by said longitudinally extending connecting bolts;
(2) The joint structure as described in.

(4) the shear force resisting member comprises at least two resisting clamping members fixed relative to each other, clamping the steel tube member in a direction substantially perpendicular to the longitudinal direction of the steel tube member;
The resistance clamping member includes a partially cylindrical resistance clamping portion that directly or indirectly abuts the surface of the outer periphery of the steel pipe member, and a resistance flange portion that extends radially outward from a circumferential end of the resistance clamping portion. with
The at least two resistance clamping members are fixed relative to each other while being arranged such that the respective resistance clamping portions of the at least two resistance clamping members directly or indirectly abut the surface of the outer periphery of the steel tube member. formed so that a gap is formed between opposing resistance flange portions of the resistance sandwiching members that are adjacent in the circumferential direction of the steel pipe member in a state before being formed,
The at least two resistance clamping members are for clamping extending 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. The resistance flange portions facing each other are fixed by bolts to be joined to the steel pipe member,
The joint structure according to any one of (1) to (3).

(5) the shear force resistance member is joined to the steel pipe member via an adhesive;
The joint structure according to any one of (1) to (4).

(6) the joining member comprises at least two joining clamping members fixed relative to each other, sandwiching the steel pipe member in a direction substantially perpendicular to the longitudinal direction of the steel pipe member;
The joint clamping member includes a partially cylindrical joint clamping portion that directly or indirectly abuts on the outer peripheral surface of the steel pipe member, and a joint flange portion that extends radially outward from a circumferential end of the joint clamping portion. with
In the at least two joint clamping members, the joint flange portions of the joint clamping members that are adjacent in the circumferential direction of the steel pipe members are fixed to each other by a fixing member that extends in the direction in which the joint flange portions face each other. By doing so, it is joined to the steel pipe member,
The fixing members for the at least two joint clamping members are configured so that the joint flange portions of the joint clamping members adjacent in the circumferential direction of the steel pipe member are widened by the force received from the reinforcing member. disposed radially adjacent to the tubular member so as to be restrained;
The joint structure according to any one of (1) to (5).

(7) The joint member is provided with a rib plate extending substantially perpendicularly to the longitudinal direction and on the opposite side of the steel pipe member.
The joint structure according to any one of (1) to (6).

(8) the surface roughness of the joint portion of the steel pipe member to which the shear force resistance member is joined is larger than the surface roughness of the joint portion of the steel pipe member to which the joint member is joined;
The joint structure according to any one of (1) to (7).

1 Joining structure 2 Joining member 21 Joining clamping member 21a Joining clamping part 21b Joining flange part 21c Rib plate 21d Joining collar part 22 Clamping bolt 23 Clamping washer 24 Connecting member 25 Filling material 3 Shear force resistance member 31 Resistance clamping member 31a Resistance Clamping portion 31b Resistance flange portion 31c Rib plate 31d Resistance collar portion 32 Clamping bolt 33 Connecting bolt 34 Adhesive 35 Joint plate BD Reinforcement member (brace)
CD Circumferential direction CM1, CM2 Connection member G Gap H Filling hole HS Reinforcement member (H-shaped steel)
LD Longitudinal direction SD1, SD2 Pinch direction SP Steel pipe member SP1 Joint point of steel pipe member where shear force resistance member is joined SP2 Joint point of steel pipe member where joined member is joined

Claims (8)

A joint structure for joining a reinforcing member to a steel pipe member of an existing structure,
a joining member that is joined to the steel pipe member so as to cover the outer periphery of the steel pipe member and to which the reinforcing member is joined;
a shear force resistance member joined to the steel pipe member so as to cover the outer periphery of the steel pipe member;
A joint structure in which the shear force resistance member is arranged so as to directly or indirectly contact the joint 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 interposed therebetween.
The joining structure according to claim 1. A pair of shear force resistance members that are joined to the steel pipe member on both sides in the longitudinal direction with the joining member interposed therebetween are arranged in the longitudinal direction so that relative movement with respect to each other in directions separating from each other in the longitudinal direction is suppressed. connected to each other by connecting bolts extending in the direction of
The joining structure according to claim 2. The shear force resisting member comprises at least two resisting clamping members fixed relative to each other, clamping the steel tube member in a direction substantially perpendicular to the longitudinal direction of the steel tube member;
The resistance clamping member includes a partially cylindrical resistance clamping portion that directly or indirectly abuts the surface of the outer periphery of the steel pipe member, and a resistance flange portion that extends radially outward from a circumferential end of the resistance clamping portion. with
The at least two resistance clamping members are fixed relative to each other while being arranged such that the respective resistance clamping portions of the at least two resistance clamping members directly or indirectly abut the surface of the outer periphery of the steel tube member. formed so that a gap is formed between opposing resistance flange portions of the resistance sandwiching members that are adjacent in the circumferential direction of the steel pipe member in a state before being formed,
The at least two resistance clamping members are for clamping extending 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. The resistance flange portions facing each other are fixed by bolts to be joined to the steel pipe member,
The joint structure according to any one of claims 1 to 3. The shear force resistance member is joined to the steel pipe member via an adhesive,
The joint structure according to any one of claims 1 to 3. The joining member comprises at least two joining clamping members fixed relative to each other, sandwiching the steel pipe member in a direction substantially perpendicular to the longitudinal direction of the steel pipe member;
The joint clamping member includes a partially cylindrical joint clamping portion that directly or indirectly abuts on the outer peripheral surface of the steel pipe member, and a joint flange portion that extends radially outward from a circumferential end of the joint clamping portion. with
In the at least two joint clamping members, the joint flange portions of the joint clamping members that are adjacent in the circumferential direction of the steel pipe members are fixed to each other by a fixing member that extends in the direction in which the joint flange portions face each other. By doing so, it is joined to the steel pipe member,
The fixing members for the at least two joint clamping members are configured so that the joint flange portions of the joint clamping members adjacent in the circumferential direction of the steel pipe member are widened by the force received from the reinforcing member. disposed radially adjacent to the tubular member so as to be restrained;
The joint structure according to any one of claims 1 to 3. The joint member is provided with a rib plate extending substantially perpendicularly to the longitudinal direction and on the side opposite to the steel pipe member.
The joint structure according to any one of claims 1 to 3. The surface roughness of the surface of the joint of the steel pipe member to which the shear force resistance member is joined is larger than the surface roughness of the surface of the joint of the steel pipe member to which the joint member is joined,
The joint structure according to any one of claims 1 to 3.

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