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 1 is mainly composed of a stationary plate 3, ribs 7a, 7b, a spacer 11, a hook 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. A gusset plate 9 is joined to the stationary plate 3 and the rib 7a approximately perpendicularly to the rib 7a and the stationary plate 3 between the upper and lower ribs 7a. The spacer 11 and the hook plate 13 are fixed to both end parts of the upper and lower ribs 7a in a width direction. A hook part 13c is formed on the hook plate 13 with a cutout part 13b. The hook part 13c can be hooked on 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] FIG. 11 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 the 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] 12(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] 12(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, the force is applied in the direction of the weak axis of the structure 111, 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 the reinforcing member in the direction of the weak axis 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, the fixing member comprising a fixing plate having bolt holes, a rib joined along the width direction of the fixing plate, a gusset plate fixed approximately perpendicular to the rib and the fixing plate, and hook portions arranged to protrude on both sides of the fixing plate in the width direction of the fixing plate, characterized in that when the fixing plate is placed on the web of the structure, the hook portions can be positioned on the outside of each flange.

[0013] It is desirable that the hook portion be formed on a hook plate, and that the hook plate be fixed to the rib with a bolt.

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

[0015] According to the first aspect of the present invention, by arranging the hook portions on the outer sides of the flanges, it is possible to prevent the structure from being deformed so that the flanges move away from each other outward.

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

[0017] Furthermore, by sandwiching a spacer between the hook plate and the rib, interference between the welded portion between the rib and the fixing plate and the hook plate can be suppressed.

[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, a reinforcing member fixed to the gusset plate of the fixing member, and another fixing member arranged on the other side of the structure and fixed to the fixing member with a bolt, sandwiching the web between them, and characterized in that the hook portion is arranged on the outside of each of the opposing flanges 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 the fixing member 1, and FIG. 1B is an enlarged view of the hook plate 13. FIG. [Figure 2] FIG. [Figure 3] FIG. 2A is a plan view of the fixing member 1, and FIG. 2B is a front view of the fixing member 1. FIG. [Figure 4] 1A is a side view of the fixing member 1, and FIG. 1B is an enlarged view of part A in FIG. [Figure 5] 3A and 3B are diagrams showing a reinforcing member fixing structure 20. [Figure 6] (a) is an enlarged view of part B in FIG. 5, and (b) is an enlarged view of part C in FIG. [Figure 7] FIG. [Figure 8] FIG. 10 is a perspective view of another reinforcing member fixing structure. [Figure 9] FIG. 10 is a plan view of another reinforcing member fixing structure. [Figure 10] FIG. 10 is a plan view of another reinforcing member fixing structure. [Figure 11] FIG. [Figure 12] 10A and 10B are diagrams showing a fixed state of fixing members 101 and 103. DETAILED DESCRIPTION OF THE INVENTION

[0022] A fixing member according to an embodiment of the present invention will be described below. 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 1, and Fig. 2 is an assembled perspective view of the fixing member 1. The fixing member 1 is mainly composed of a fixing plate 3, ribs 7a and 7b, a gusset plate 9, a spacer 11, a hook 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 gusset plate 9 is joined to the fixed plate 3 and the rib 7a, approximately perpendicular to the rib 7a and fixed plate 3. The gusset plate 9 is joined, for example, to approximately the center of the fixed plate 3 in the width direction.

[0024] On both sides of the gusset plate 9, plate-shaped ribs 7b are joined to the fixed plate 3 and the gusset plate 9 at approximately the center in the height direction of the fixed plate 3. Note that the fixed member 1 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 the gusset plate 9 may be integrally formed. Furthermore, the central rib 7b is not necessarily required as long as the strength is sufficient.

[0025] 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 3 also has a plurality of bolt holes 5 formed therein for fixing to the structure. The bolt holes 5 are arranged, for example, in four sections separated by the gusset plate 9 and the rib 7b.

[0026] As shown in Fig. 2, a spacer 11 and a hook 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 hook plate 13. Therefore, the spacer 11 and the hook plate 13 are fixed to the rib 7a by bolts 17 that pass through holes 15, 11a, and 13a.

[0027] 1(b) is an enlarged view of hook plate 13. As described above, hook plate 13 has hole 13a and notch 13b at one end. Notch 13b forms hook portion 13c at one end of hook plate 13. Hook portion 13c can be hooked onto a flange of a structure, which will be described later.

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

[0029] Fig. 3(a) is a plan view of the fixing member 1, and Fig. 3(b) is a front view of the fixing member 1. The hook portion 13c and the cutout portion 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 a plan view, the cutout portion 13b and the hook portion 13c are exposed on both sides of the rib 7a.

[0030] Note that Figure 3(b) shows an example in which the spacer 11 and hook 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 a pair of ribs 7a), but the spacer 11 and hook 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 1, 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, a bead of the weld 19 is formed at the corner of the fixing portion between the rib 7a and the fixing plate 3. Meanwhile, the hook plate 13 is fixed so that the rear edge of the hook plate 13 contacts the front surface of the fixing plate 3.

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

[0033] Next, we will explain the structure for fixing a reinforcing member to a structure using the fixing member 1. Fig. 5 is a diagram showing a reinforcing member fixing structure 20, Fig. 6(a) is an enlarged view of part B in Fig. 5, and Fig. 6(b) is an enlarged view of part C in Fig. 5. 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.

[0034] First, a fixing member 1 (fixing plate 3) is placed on one side of a pillar 21, which is a structural body 25, and a fixing member 1a (fixing plate 33) is placed on the other side of the pillar 21, and they are fixed with bolts 35 (see FIG. 6(b)). In FIG. 6(a), the fixing member 1a is placed on the back side (rear side of the drawing) of the pillar 21, and in FIG. 6(b), the fixing member 1 is placed on the back side (rear side of the drawing) of the pillar 21. That is, the fixing members 1 and 1a are placed with the pillar 21 sandwiched between them, and are fixed with bolts 35 that pass through the bolt holes 5 of the fixing member 1 and the bolt holes (not shown) of the web 21a of the pillar 21 and the fixing member 1a.

[0035] 6(b), the fixing member 1a has a fixing plate 33 corresponding to the fixing plate 3, ribs 31a joined continuously in the width direction near the upper and lower ends of the fixing plate 33, and ribs 31c joined continuously in the height direction perpendicular to the width direction of the fixing plate 33 to the upper and lower ribs 31a and the fixing plate 33. In addition, on both sides of the rib 31c in the width direction, approximately in the center in the height direction, a rib 31b is divided and fixed to the fixing plate 33 and the rib 31c.

[0036] The fixed plate 3 and the fixed plate 33 are arranged at positions corresponding to each other, and the ribs 31a, 31b, and 31c of the fixed member 1a are arranged at positions corresponding to the ribs 7a, gusset plate 9, and ribs 7b of the fixed member 1, respectively.

[0037] 7 is a plan view showing the state in which the fixing members 1, 1a are fixed to the pillar 21. As described above, the fixing members 1, 1a are arranged so as to sandwich the web 21a of the pillar 21, and are fixed by the fixing plates 3, 33. In this state, the spacer 11 and the hook plate 13 are fixed to the fixing member 1. At this time, the hook plate 13 is fixed by inserting the flange 21b into the cutout portion 13b of the hook plate 13.

[0038] That is, hook plate 13 is fixed to rib 7a by hooking hook portion 13c of hook plate 13 onto the outer side of flange 21b. In this way, on the side of column 21 where gusset plate 9 is fixed, the outer surfaces of the pair of flanges 21b of column 21 come into contact with hook portion 13c and are sandwiched from the outside. Note that a gap may be formed between hook plate 13 and flange 21b on the inner side of flange 21b.

[0039] After fixing the fixing members 1, 1a to the structure 25 and fixing the hook plate 13 to the fixing member 1, a brace 29, which is a reinforcing member, and a connecting beam 27 are connected to the gusset plate 9 as shown in FIG. 5. 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.

[0040] 7, when the gusset plate 9 receives a tensile force from the reinforcing member (arrow D in the figure), and as described above, an axial force is applied in the minor axis direction of the column 21, deformation of the web 21a and associated local buckling of the flange 21b may occur. For example, deformation such that the flange 21b expands in the direction of the arrow E in the figure may occur.

[0041] However, in this embodiment, the outer surface of flange 21b comes into contact with hook portion 13c and is constrained from the outside. Therefore, when flange 21b tries to expand, rib 7a receives the force from hook plate 13, and rib 7a resists the tensile force in the width direction, thereby suppressing deformation of flange 21b that would cause it to open outward.

[0042] 8, when a stiffener 39 is provided on the column 21, the hook plate 13 near that location may be omitted. That is, the hook plate 13 may be fixed to only one of the ribs 7a, and the hook plate 13 may not be fixed to the other rib 7a.

[0043] Furthermore, fixing members 1 may be placed on both sides of the pillar 21. Fig. 9 is a diagram showing a reinforcing member fixing structure in which the pillar 21 is sandwiched between a pair of fixing members 1 and reinforcing members are fixed to both sides of the pillar 21. In this way, if a fixing member 1 is placed on at least one side of the pillar 21, another fixing member placed on the other side may have a structure similar to that of fixing member 1, or may be fixing member 1a, etc.

[0044] The hook plate 13 may also be fixed to the fixing member 1a. Fig. 10 is a diagram showing a reinforcing member fixing structure in which the hook plate 13 is fixed to the fixing member 1a, the fixing members 1 and 1a sandwich the column 21, and reinforcing members are fixed to both sides of the column 21. That is, in Fig. 10, the hook plate 13 may be fixed to the rib 31a, and the hook portion 13c may also be arranged on the outside of the upper flange 21b in the figure. In this way, by forming the hook portion 13c on the fixing member on the side where the gusset plate 9 is not provided, deformation of the column 21 due to axial force in the weak axis direction of the column 21 can be more reliably suppressed.

[0045] As described above, according to this embodiment, when the fixing plate 3 is placed on the web 21a of the structure 25, the hook portions 13c are positioned so as to hook onto the outside of the flanges 21b, and the pair of hook portions 13c restrain the flanges 21b from the outside, thereby suppressing deformation of the flanges 21b in the direction of opening them apart.

[0046] Furthermore, by forming hook portion 13c on hook plate 13 and separating it from rib 7a, hook portion 13c can be reliably positioned in contact with the outer surface of flange 21b regardless of deviation in the fixing position of fixing plate 3 or variations in the shape of column 21. Incidentally, by making the width of notch 13b slightly wider than the thickness of flange 21b, it is easy to position hook portion 13c.

[0047] Furthermore, by using spacer 11 to provide a gap between hook plate 13 and rib 7a, hook plate 13 can be fixed while avoiding welded portion 19 between rib 7a and fixing plate 3.

[0048] Furthermore, by using a pair of fixing members 1 and arranging the fixing members 1 on both sides of the web 21a, it is possible to suppress deformation of the flange 21b that would cause it to open when subjected to axial force from any direction.

[0049] 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]

[0050] 1, 1a...Fixing member 3……Fixing plate 5...Bolt hole 7a, 7b...Ribs 9 Gusset plate 11...Spacer 11a……hole 13...Hook plate 13a……hole 13b...Notch 13c………Hook part 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, 31c...Ribs 33……Fixing plate 35...volts 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 along the width direction of the fixing plate; a gusset plate fixed approximately perpendicular to the rib and the fixing plate; Hook 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 hook portions can be placed on the outside of each flange.

2. 2. The fixing member according to claim 1, wherein the hook portion is formed on a hook plate, and the hook 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 hook 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; a reinforcing member fixed to the gusset plate of the fixing member; Another fixing member is arranged on the other side of the structure, sandwiching the web and fixed to the fixing member with bolts; Equipped with A fixing structure for a reinforcing member, characterized in that the hook portion is arranged on the outside of each of the opposing flanges of the structure.

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