Fixing member, and fixing structure of reinforcing member

Abstract

To provide a fixing structure of a reinforcing member for a structure capable of suppressing deformation of the structure, and a fixing member used therefor.SOLUTION: A fixing member 1a is mainly composed of a stationary plate 3, ribs 7a, 7b, 7c, a spacer 11, a stress transmission plate 13 and the like. The stationary plate 3 is a member capable of sandwiching and fixing a web of a structure. The tabular rib 7a is joined to an upper part and a lower part of the stationary plate 3 in a height direction, along a direction perpendicular to the height direction. The spacer 11 and the stress transmission plate 13 are fixed to both end parts of the upper and lower ribs 7a in a width direction. A stress transmission part 13b is formed on the stress transmission plate 13. The stress transmission part 13b can be abutted to a marginal part of a flange of the structure.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fixing member for fixing a gusset plate to which a reinforcing member for reinforcing a structure is joined, and to a fixing structure for fixing a reinforcing member to a structure using the fixing member. [Background technology]

[0002] Conventionally, existing structures have been reinforced against earthquakes by placing reinforcing members such as braces. One method for this is to join the reinforcing members to columns or beams by welding. However, joining by welding cannot be used in construction sites where open flames cannot be used. In contrast, there is a method of fixing braces, etc. to columns using fixing members instead of welding (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-31890 Summary of the Invention [Problem to be solved by the invention]

[0004] According to the method described in Patent Document 1, a reinforcing member can be fixed to a column or beam with a bolt. However, while the method described in Patent Document 1 is applicable to fixing a reinforcing member in the so-called strong axis direction (direction parallel to the web) of an H-shaped steel beam, care must be taken when fixing a reinforcing member in the weak axis direction (direction perpendicular to the web).

[0005] 12 is a diagram showing a fixing structure 100 for reinforcing members in which reinforcing members 107a and 107b are joined in the weak axis direction of a structure 111. The structure 111 is made up of a column and a beam. The column and beam are made up of, for example, H-shaped steel with a pair of flanges 113 joined by a web 115. In the fixing structure 100, the reinforcing members 107a and 107b are fixed to an existing structure 111. In the example shown, the reinforcing member 107a is arranged on a diagonal line between the column and the beam, and the reinforcing member 107b is arranged between adjacent columns and approximately parallel to the beam.

[0006] In order to fix such reinforcing members 107a and 107b to the structure 111, for example, fixing members 101 and 103 are used. The fixing member 101 is a member to which a gusset plate 105 is joined. The gusset plate 105 can be joined to the reinforcing members 107a and 107b.

[0007] Fixing member 101 and fixing member 103 are arranged on either side of web 115 of the pillar, and are fixed with bolts that pass through web 115. In other words, fixing member 101 and fixing member 103 sandwich web 115, and the two are fixed with bolts.

[0008] 13(a) is a cross-sectional view showing the fixing structure of fixing members 101, 103 to which a reinforcing member 107a is fixed. The fixing member 101 to which a gusset plate is joined is fixed to the column by the fixing member 103 from the back side of the web 115. At this time, the fixing member 101 to which a gusset plate 105 is joined receives a tensile force from the reinforcing member 107a, which is transmitted to the web 115. Note that a rib 109 is arranged on the fixing member 103 so that it can withstand this force. The fixing bolt 117 is arranged to avoid the area of ​​the rib 109.

[0009] As mentioned above, the structure 111 consisting of the web 115 and the flange 113 has a strong axis direction and a weak axis direction, and as shown in the figure, the strength is weaker in the direction approximately perpendicular to the web 115 (weak axis direction) than in the direction parallel to the web 115 (strong axis direction).

[0010] FIG. 13(b) is a conceptual diagram of when a tensile force (X in the figure) is applied to the reinforcing member 107a. As shown in the figure, when an axial force is applied to the reinforcing member 107a, a force (Y in the figure) is applied to the web 115 of the structure 111 in the weak axis direction, which may cause deformation of the web 115 and consequent local buckling of the flange 113. If the structure 111 is deformed in this way, the performance (proof strength, deformation performance, etc.) of the structure 111 may be reduced. For this reason, a fixing structure is required that can join a reinforcing member in the weak axis direction of the structure 111 and suppress deformation.

[0011] The present invention has been made in consideration of such problems, and aims to provide a fixing structure for fixing a reinforcing member to a structure that can suppress deformation of the structure, and a fixing member used therein. [Means for solving the problem]

[0012] In order to achieve the above-mentioned object, the first invention is a fixing member for fixing a reinforcing member to a structure in which a pair of flanges are connected by a web, comprising a fixing plate having bolt holes, a rib joined in the width direction of the fixing plate, and a stress transmission portion arranged to protrude on both sides of the fixing plate in the width direction of the fixing plate, and characterized in that when the fixing plate is placed on the web of the structure, the stress transmission portion can be abutted against the edge portion of each flange.

[0013] It is preferable that the stress transfer portion is formed on a stress transfer plate, and that the stress transfer plate is fixed to the rib with a bolt.

[0014] A spacer may be sandwiched between the stress transfer plate and the rib.

[0015] According to the first aspect of the present invention, the stress transmission part contacts the outer edge of the flange, so that the edge of the flange can bear part of the force acting on the web in the weak axis direction (the direction parallel to the flange). As a result, the force acting on the web is distributed to the flange, and deformation of the structure in the weak axis direction can be suppressed.

[0016] Furthermore, by forming the stress transmission portion on a separate stress transmission plate and fixing the stress transmission plate to the rib with bolts, the position of the stress transmission portion can be adjusted to suit the structure on which it is to be installed.

[0017] Furthermore, by sandwiching a spacer between the stress transmission plate and the rib, it is possible to prevent interference between the welded portion between the rib and the fixing plate and the stress transmission plate.

[0018] The second invention is a fixing structure for a reinforcing member to a structure using the fixing member of the first invention, comprising the fixing member arranged on one side of the web of the structure, another fixing member arranged on the other side of the structure and fixed to the fixing member with bolts, sandwiching the web between them, and a reinforcing member fixed to a gusset plate joined to the other fixing member, characterized in that the stress transmission portion abuts against the edge portion of each flange of the structure.

[0019] According to the second aspect of the present invention, it is possible to easily obtain a fixing structure for a reinforcing member in which the reinforcing member is fixed in the minor axis direction of the structure. [Effects of the Invention]

[0020] According to the present invention, it is possible to provide a structure for fixing a reinforcing member to a structure, which is capable of suppressing deformation of the structure, and a fixing member used therein. [Brief explanation of the drawings]

[0021] [Figure 1] 1A is an exploded perspective view of a fixing member 1a, and FIG. 1B is an enlarged view of a stress transmission plate 13. FIG. [Figure 2] FIG. [Figure 3] FIG. 2(a) is a plan view of the fixing member 1a, and FIG. 2(b) is a front view of the fixing member 1a. [Figure 4] FIG. 1(a) is a side view of the fixing member 1a, and FIG. 1(b) is an enlarged view of part A in FIG. [Figure 5] FIG. [Figure 6] 3A and 3B are diagrams showing a reinforcing member fixing structure 20. [Figure 7] (a) is an enlarged view of part B in FIG. 6, and (b) is an enlarged view of part C in FIG. [Figure 8] (a) is a plan view of the reinforcing member fixing structure, and (b) is an enlarged view of part E in (a). [Figure 9] FIG. 10 is a perspective view of another reinforcing member fixing structure. [Figure 10] FIG. 10 is a perspective view of another fixing member 1b. [Figure 11] FIG. 10 is a plan view of another reinforcing member fixing structure. [Figure 12] FIG. [Figure 13] 10A and 10B are diagrams showing a fixed state of fixing members 101 and 103. DETAILED DESCRIPTION OF THE INVENTION

[0022] The following describes a fixing member according to an embodiment of the present invention. A fixing member is a member for fixing a reinforcing member to a structure, and a pair of fixing members are used as a set. Fig. 1(a) is an exploded perspective view showing one fixing member 1a, and Fig. 2 is an assembled perspective view of fixing member 1a. Fixing member 1a is mainly composed of a fixing plate 3, ribs 7a, 7b, 7c, a spacer 11, a stress transfer plate 13, etc.

[0023] The fixed plate 3 is a member capable of sandwiching and fixing the web of the structure. Plate-shaped ribs 7a are joined to the upper and lower parts of the fixed plate 3 in the height direction (vertical direction in the drawing) along a direction perpendicular to the height direction (hereinafter referred to as the width direction). Furthermore, between the upper and lower ribs 7a, a rib 7c is joined to the fixed plate 3 and rib 7a, approximately perpendicular to the rib 7a and fixed plate 3. The rib 7c is joined, for example, to approximately the center of the fixed plate 3 in the width direction.

[0024] On both sides of the rib 7c, plate-shaped ribs 7b are joined to the fixed plate 3 and the ribs 7c at approximately the center in the height direction of the fixed plate 3. Note that the fixed member 1a is not limited to the form shown in the figures, and for example, the fixed plate 3 and any of the ribs 7a, 7b, and 7c may be integrally formed. Also, the central rib 7b is not necessarily required as long as the strength is sufficient.

[0025] A plurality of bolt holes 5 for fixing to a structure are provided in the fixing plate 3. The bolt holes 5 are arranged, for example, in four sections divided by the ribs 7b and 7c.

[0026] As shown in Fig. 2, a spacer 11 and a stress transmission plate 13 are fixed to both widthwise ends of the upper and lower ribs 7a. As shown in Fig. 1(a), holes 15 are formed near the widthwise ends of the rib 7a, holes 11a are formed in the spacer 11, and holes 13a are formed in the stress transmission plate 13. Therefore, the spacer 11 and the stress transmission plate 13 are fixed to the rib 7a by bolts 17 that pass through the holes 15, 11a, and 13a.

[0027] 1(b) is an enlarged view of the stress transfer plate 13. As described above, the stress transfer plate 13 has holes 13a and a stress transfer portion 13b at one end. The stress transfer portion 13b is a protrusion that protrudes from one side of the stress transfer plate 13. When the fixing plate 3 is placed on a web of a structure (described later), the stress transfer portion 13b can abut against the edge of a flange of the structure.

[0028] As described above, the stress transmission plate 13 is fixed to the rib 7a with the bolts 17, and the spacer 11 is sandwiched between the rib 7a and the stress transmission plate 13. The effect of the spacer 11 will be described later. Also, instead of using the stress transmission plate 13, the stress transmission portion 13b may be formed directly on the rib 7a.

[0029] Fig. 3(a) is a plan view of the fixing member 1a, and Fig. 3(b) is a front view of the fixing member 1a. The stress transmission parts 13b are provided so as to protrude on both sides of the fixing plate 3 and the rib 7a in the width direction of the fixing plate 3. That is, in plan view, the stress transmission parts 13b are exposed on both sides of the rib 7a.

[0030] Although Figure 3(b) shows an example in which the spacer 11 and the stress transfer plate 13 are arranged on the underside of the upper rib 7a and the upper side of the lower rib 7a (i.e., arranged inside the pair of ribs 7a), the spacer 11 and the stress transfer plate 13 may also be arranged on the outer side of each rib 7a.

[0031] Fig. 4(a) is a side view of the fixing member 1a, and Fig. 4(b) is an enlarged view of part A in Fig. 4(a). The rib 7a is fixed to the fixing plate 3 by a weld 19. At this time, beads of the weld 19 are formed at the corners of the fixing portion between the rib 7a and the fixing plate 3. Meanwhile, the stress transfer plate 13 is fixed so that the rear edge of the stress transfer plate 13 comes into contact with the front surface of the fixing plate 3.

[0032] The spacer 11 functions to prevent interference between the welded portion 19 and the stress transfer plate 13 when the stress transfer plate 13 is fixed so as to come into contact with the fixed plate 3. That is, the spacer 11 is fixed so as to leave a predetermined gap between the spacer 11 and the fixed plate 3, and the stress transfer plate 13 is fixed at a position spaced apart from the rib 7a by the thickness of the spacer 11. In this way, the stress transfer plate 13 can be stably positioned on the fixed plate 3.

[0033] Next, the fixing member 1b, which is used in pairs with the fixing member 1a, will be described. Fig. 5 is a perspective view showing the fixing member 1b. The fixing member 1b is mainly composed of a fixing plate 33, ribs 31a and 31b, a gusset plate 9, etc.

[0034] The fixed plate 33 is a member capable of sandwiching and fixing the web of the structure. Plate-shaped ribs 31a are joined to the upper and lower parts of the fixed plate 33 in the height direction (vertical direction in the figure) along a direction perpendicular to the height direction. Furthermore, between the upper and lower ribs 31a, a gusset plate 9 is joined to the fixed plate 33 and the rib 31a, approximately perpendicular to the rib 31a and fixed plate 33. The gusset plate 9 is joined, for example, to approximately the center of the fixed plate 33 in the width direction.

[0035] On both sides of the gusset plate 9, plate-shaped ribs 31b are joined to the fixed plate 33 and the gusset plate 9 at approximately the center in the height direction of the fixed plate 33. Note that the fixing member 1b is not limited to the form shown in the figure, and for example, the fixed plate 33 and any of the ribs 31a, 31b and the gusset plate 9 may be integrally formed. Also, the central rib 31b is not necessarily required as long as the strength is sufficient.

[0036] The gusset plate 9 has a plurality of holes formed therein to which reinforcing members, which will be described later, can be joined. The fixing plate 33 also has a plurality of bolt holes 37 formed therein for fixing to the structure. The bolt holes 37 are arranged, for example, in four sections separated by the gusset plate 9 and the rib 31b.

[0037] Next, a structure for fixing a reinforcing member to a structure using fixing members 1a and 1b will be described. Fig. 6 is a diagram showing a reinforcing member fixing structure 20, Fig. 7(a) is an enlarged view of part B in Fig. 6, and Fig. 7(b) is an enlarged view of part C in Fig. 6. The structure 25 consists of a column 21 and a beam 23. The column 21 is an H-shaped steel with a pair of flanges 21b connected by a web 21a.

[0038] First, fixing member 1a (fixing plate 3) is placed on one side of pillar 21, which is structural body 25, and fixing member 1b (fixing plate 33) is placed on the other side of pillar 21, and they are fixed with bolts 35 (see FIG. 7(b)). In FIG. 7(a), fixing member 1a is placed on the back side (rear side of the drawing) of pillar 21, and in FIG. 7(b), fixing member 1b is placed on the back side (rear side of the drawing) of pillar 21. That is, fixing members 1a and 1b are placed with pillar 21 sandwiched between them, and fixed with bolts 35 that pass through bolt hole 5 of fixing member 1a, a hole (not shown) in web 21a of pillar 21, and bolt hole 37 in fixing member 1b.

[0039] The fixed plates 3 and 33 are arranged at positions corresponding to each other, and the ribs 31a, 31b, and gusset plate 9 of the fixed member 1b are arranged at positions corresponding to the ribs 7a, 7b, and 7c of the fixed member 1a, respectively.

[0040] FIG. 8(a) is a plan view of the fixing members 1a and 1b fixed to the pillar 21, and FIG. 8(b) is an enlarged view of part E in FIG. 8(a). First, the fixing members 1a and 1b are arranged so as to sandwich the web 21a of the pillar 21, and are fixed with the fixing plates 3 and 33. In this state, the spacer 11 and the stress transfer plate 13 are fixed to the fixing member 1a. At this time, as shown in FIG. 8(b), the stress transfer plate 13 is fixed so that the stress transfer portion 13b of the stress transfer plate 13 comes into contact with the edge of the flange 21b.

[0041] In this way, the stress transmission parts 13b come into contact with the outer edge parts of the pair of flanges 21b of the column 21 on the side opposite to the side where the gusset plate 9 is fixed to the column 21. Note that a gap may be formed between the stress transmission plate 13 and the flange 21b on the inner surface side of the flange 21b.

[0042] After fixing the fixing members 1a and 1b to the structure 25 and fixing the stress transfer plate 13 to the fixing member 1a, a brace 29, which is a reinforcing member, and a connecting beam 27 are connected to the gusset plate 9 as shown in FIG. 6. The brace 29 is fixed to the bolt hole of the gusset plate 9 and connected diagonally to the structure 25 (column 21). The connecting beam 27 is fixed to the bolt hole of the gusset plate 9 and connected perpendicularly to the column 21 of the structure 25. In this way, the reinforcing member fixing structure 20 can be obtained.

[0043] Here, as shown in Figure 8(a), when the gusset plate 9 receives a tensile force from the reinforcing member (arrow D in the figure), and as mentioned above, when an axial force is applied in the weak axis direction of the column 21, deformation of the web 21a and consequent local buckling of the flange 21b may occur.

[0044] However, in this embodiment, as shown in FIG. 8(b), the stress transmission portion 13b comes into contact with the edge of the flange 21b. Therefore, part of the force in the minor axis direction transmitted from the gusset plate 9 to the web 21a is also transmitted from the stress transmission portion 13b to the flange 21b via the fixing members 1a and 1b. In other words, a force is applied to the side surface of the plate-like flange 21b in a direction parallel to the width direction of the flange 21b (the direction perpendicular to the web 21a). Therefore, the force received by the web 21a is distributed to the flange 21b. Furthermore, because deformation of the flange 21b in response to the force from the side edge is small, deformation of the web 21a and deformation that would cause the flange 21b to open outward can be suppressed.

[0045] 9, when a stiffener 39 is provided on the column 21, the stress transmission plate 13 near that location may be omitted. That is, the stress transmission plate 13 may be fixed to only one of the ribs 7a, and the stress transmission plate 13 may not be fixed to the other rib 7a.

[0046] Furthermore, reinforcing members may be placed on both sides of the column 21. In this case, the stress transfer plate 13 is fixed to the fixing member 1b. Fig. 10 is a perspective view showing the fixing member 1b to which the stress transfer plate 13 is fixed. In this case, the spacer 11 and the stress transfer plate 13 are fixed to the rib 31a.

[0047] 11 is a diagram showing a reinforcing member fixing structure in which a column 21 is sandwiched between a pair of fixing members 1b each having a stress transmission plate 13, and reinforcing members are fixed to both sides of the column 21. In this way, when gusset plates 9 are provided on both sides, fixing the stress transmission plates 13 on either side makes it possible to more reliably suppress deformation of the column 21 due to axial force in the weak axis direction of the column 21.

[0048] As described above, according to this embodiment, the stress transfer plate 13 is fixed so as to contact the side edge portion of the flange 21b while the fixing plate 3 is placed on the web 21a of the structure 25, thereby suppressing deformation of the structure 25.

[0049] Furthermore, by forming the stress transmission portion 13b on the stress transmission plate 13 and making it separate from the rib 7a, the stress transmission portion 13b can be reliably positioned in contact with the side end surface of the flange 21b regardless of deviation in the fixed position of the fixed plate 3 or variations in the shape of the column 21.

[0050] Furthermore, by using the spacer 11 to provide a gap between the stress transmission plate 13 and the rib 7a, the stress transmission plate 13 can be fixed while avoiding the welded portion 19 between the rib 7a and the fixing plate 3.

[0051] Furthermore, by using a pair of fixing members 1b having stress transmission plates 13 and arranging the fixing members 1b on both sides of the web 21a, deformation of the structure 25 can be suppressed regardless of the axial force from any direction.

[0052] Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical scope of the present invention is not limited to the above-described embodiments. It is clear that those skilled in the art can conceive of various modifications and alterations within the scope of the technical ideas described in the claims, and it is understood that these modifications and alterations also fall within the technical scope of the present invention. [Explanation of symbols]

[0053] 1a, 1b...Fixing members 3……Fixing plate 5...Bolt hole 7a, 7b, 7c...Ribs 9 Gusset plate 11...Spacer 11a……hole 13...Stress transfer plate 13a……hole 13b: Stress transfer section 15……hole 17....Volts 19...Welded section 20...Reinforcing member fixing structure 21... Pillar 21a………Web 21b...Flange 23……Beam 25……Structure 27...Connecting beam 29...Brace 31a, 31b...Ribs 33……Fixing plate 35...volts 37...Bolt hole 39...Stiffener 100……Fixed structure 101, 103...Fixing members 105... Gusset plate 107a, 107b... Reinforcing members 109...Ribs 111……Structure 113...Flange 115...Web 117....Volts

Claims

1. A fixing member for fixing a reinforcing member to a structure, in which a pair of flanges are connected by a web, a fixing plate having a bolt hole; a rib joined to the fixing plate in the width direction; stress transmission portions provided so as to protrude on both sides of the fixing plate in the width direction of the fixing plate; Equipped with A fixing member characterized in that, when the fixing plate is placed on a web of a structure, the stress transfer portions can be abutted against the edges of each flange.

2. 2. The fixing member according to claim 1, wherein the stress transfer portion is formed on a stress transfer plate, and the stress transfer plate is fixed to the rib with a bolt.

3. 3. The fixing member according to claim 2, wherein a spacer is sandwiched between the stress transmission plate and the rib.

4. A structure for fixing a reinforcing member to a structure using the fixing member according to any one of claims 1 to 3, the securing member disposed on one side of the web of the structure; Another fixing member is arranged on the other side of the structure, sandwiching the web and fixed to the fixing member with bolts; a reinforcing member fixed to the gusset plate joined to the other fixing member; Equipped with A fixing structure for a reinforcing member, characterized in that the stress transfer portion is abutted against the edge portion of each flange of the structure.

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