Reinforcement structure and reinforcement method

Abstract

To easily restrict influence of welding on surroundings while improving the strength of a reinforcement.SOLUTION: In a reinforcement structure having a steel material, a rod material with a tip welded to the steel material, a plate material provided additionally with a welding space between the steel material and itself and having an insertion hole inserted into the rod material and with a diameter wider than that of the rod material, and a fastening material threaded into the rod material, the welding space is filled with a filling material between the steel material and the plate material, and the fastening material blocks a gap between the rod material and the insertion hole and presses the plate material onto the filling material.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a reinforcement structure and a reinforcement method. [Background technology]

[0002] When reinforcing a steel structure (steel material), welding work is generally performed. Such welding work is performed using a welding device such as that disclosed in Patent Document 1, for example. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-68089 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, welding work using such welding equipment generates sparks, odors, dust, etc., which may lead to fires caused by sparks, odors that may cause trouble for third parties, health hazards caused by dust, etc. In addition, when protective measures are required, fairly large-scale protective measures are required, and reinforcement takes time and effort.

[0005] Furthermore, when reinforcing a steel structure (steel material) by welding the tip of a bar material to the steel structure (steel material) and inserting the bar material through a through hole in the reinforcing plate (plate material) to attach the reinforcing plate, the through hole needs to be formed with a diameter larger than that of the bar material, taking into consideration manufacturing errors, installation errors, etc. For this reason, a gap is generated between the through hole and the bar material, which may reduce the performance (strength, etc.) of the reinforced member.

[0006] The present invention has been made in consideration of the above problems, and an object of the present invention is to easily suppress the influence of welding on the surroundings and to improve the strength of reinforcement. [Means for solving the problem]

[0007] The main invention to achieve the above object is: Steel and A bar material having a tip welded to the steel material; a plate material attached to the steel material with a welded space therebetween, the plate material having an insertion hole with a diameter larger than that of the bar material through which the bar material is inserted; A fastening member that is screwed onto the bar material; A reinforcing structure having The welding space between the steel material and the plate material is filled with a filler material, The fastening material fills the gap between the bar material and the insertion hole, and fastens the plate material to the filler material. It is being forced upon them. The plate material is A receiving portion for receiving the filler; A dam portion for preventing leakage of the filling material; have This is a reinforcing structure characterized by the above.

[0008] Other features of the present invention will become apparent from the following detailed description of the present invention and the accompanying drawings. Effect of the Invention

[0009] According to the present invention, the influence of welding on the surroundings can be easily suppressed and the reinforcement strength can be improved. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a schematic perspective view of the reinforcing structure of the present embodiment. [Diagram 2] FIG. 2 is a schematic exploded perspective view of FIG. [Diagram 3] 3A to 3E are explanatory views showing a reinforcing method for forming the reinforcing structure of FIG. [Figure 4] Fig. 4A is a schematic cross-sectional view of the welded portion in Fig. 3B, and Fig. 4B is a perspective view of the insulating sleeve 32. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] At least the following matters will become apparent from this specification and the accompanying drawings.

[0012] A reinforcement structure comprising a steel material, a bar material having a tip welded to the steel material, a plate material attached to the steel material with a welded space between it and the steel material, the plate material having a through hole with a wider diameter than the bar material and through which the bar material passes, and a fastening material screwed into the bar material, wherein the welded space between the steel material and the plate material is filled with a filler material, and the fastening material seals the gap between the bar material and the through hole and presses the plate material against the filler material.

[0013] According to this type of reinforcement structure, by attaching the plate material used for reinforcement to the steel material, a welding space is formed between the steel material and the plate material, so that the diffusion of sparks, odors, dust, etc. generated during welding can be easily suppressed. In addition, each member constituting the welding space can be integrated with a filler material, so that the strength of the reinforcement can be improved. Therefore, the impact of welding on the surroundings can be easily suppressed and the strength of the reinforcement can be improved.

[0014] In such a reinforcing structure, it is preferable that the plate material has a receiving portion for receiving the filler and a dam portion for preventing leakage of the filler.

[0015] According to such a reinforcing structure, leakage of the filler can be suppressed, and the filler can be efficiently filled.

[0016] In such a reinforcing structure, it is desirable that the filler has flowability and hardening properties.

[0017] According to such a reinforcing structure, the weld space can be filled with a filler material, and the components constituting the weld space can be integrated together as the filler material hardens.

[0018] Also, there is a reinforcing method for reinforcing steel material using a plate material and a bar material, comprising: a through hole forming step of forming a through hole in the plate material with a diameter larger than that of the bar material; a plate material attaching step of attaching the plate material with the through hole formed therein so that a welded space is formed between the plate material and the steel material; a welding step of inserting the bar material into the through hole of the plate material and welding an end of the bar material to the steel material; a fastening material attaching step of screwing a fastening material onto the bar material to fill a gap between the bar material and the insertion hole with the fastening material; and a filling step of filling the welded space with a filling material.

[0019] According to this reinforcement method, the influence of welding on the surroundings can be easily suppressed and the strength of the reinforcement can be improved.

[0020] Such a reinforcement method preferably includes a ferrule installation process for installing a ferrule in the insertion hole of the plate material prior to the plate material attachment process, in which the plate material is attached to the steel material so that the ferrule is positioned in the welding space, and in the welding process, the rod material is inserted into the insertion hole and the ferrule, and after the welding process, the ferrule is removed.

[0021] According to such a reinforcing method, it is possible to further suppress the diffusion of sparks, odors, dust, etc. that are generated during welding, and it is also possible to prevent the ferrule from being left in the welding space.

[0022] It is preferable that such a reinforcing method further includes a curing step of curing the gap between the steel material and the plate material, and the gap between the bar material and the insertion hole, prior to the welding step.

[0023] According to this reinforcing method, the diffusion of sparks, odors, dust, and the like generated during welding can be further suppressed.

[0024] In such a reinforcement method, it is preferable that in the curing step, a fire-resistant and heat-resistant insulating material is placed in the gap between the rod and the insertion hole.

[0025] According to such a reinforcing method, contact between the bar material and the plate material can be prevented during welding, and the bar material and the plate material can be insulated from each other.

[0026] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0027] ===This embodiment=== <Reinforcement structure>

[0028] Fig. 1 is a schematic perspective view of the reinforcing structure of this embodiment. Fig. 2 is a schematic exploded perspective view of Fig. 1. Note that the filler 50 is omitted from Fig. 2. In the following description, the vertical direction, width direction, and longitudinal direction that intersect with each other are defined as shown in the figure. The longitudinal direction is the length direction of the H-shaped steel 1, and the vertical direction is the direction along the thickness direction of a pair of flanges 2 of the H-shaped steel 1 (the direction in which the pair of flanges 2 are aligned). The width direction is the direction perpendicular to the vertical direction and the longitudinal direction.

[0029] As shown in FIGS. 1 and 2, the reinforcement structure of this embodiment includes an H-shaped steel 1, a stud bolt 10, a spacer 12, a nut 14, a reinforcement plate 20, and a filler 50.

[0030] The H-shaped steel 1 is, for example, a steel structure constituting a column or beam (here, a beam) in a building, and is a steel material with an "H" shaped cross section. The H-shaped steel 1 has a pair of plate-like flanges 2 (upper flange 2A and lower flange 2B) arranged in parallel with a gap between them vertically, and a plate-like web 4 that vertically connects the upper flange 2A and the lower flange 2B at the center in the width direction. In this embodiment, a reinforcing plate 20 is provided on the lower flange 2B (corresponding to a steel material) of the H-shaped steel 1 to reinforce the lower flange 2B.

[0031] The stud bolt 10 (corresponding to a rod material) is a rod-shaped member (bolt) whose tip is formed so that it can be stud-welded, and its tip (upper end) is welded to the underside of the lower flange 2B. A plurality of stud bolts 10 are welded to the lower flange 2B at intervals in the width and length directions. Note that sparks, odors, dust, etc. are generated when stud welding is performed, which may lead to fires caused by sparks, unpleasant odors for third parties, and health damage caused by dust. In addition, fairly extensive curing is required, which takes time and effort.

[0032] Therefore, in this embodiment, a space S for welding (corresponding to a welding space) is formed using a reinforcing plate 20 used for reinforcement as described below, and stud welding is performed. This makes it possible to easily suppress the diffusion of sparks, odors, dust, etc. that are generated during welding (it is possible to suppress the impact of welding on the surroundings).

[0033] The spacer 12 is a member that is sandwiched between the lower flange 2B and the receiving portion 22 of the reinforcing plate 20 to maintain the distance between the lower flange 2B and the reinforcing plate 20 (receiving portion 22) and to transmit pressure. The spacer 12 in this embodiment is a metallic member having a cylindrical shape (specifically, the same shape as the abutment portion 30b of the ferrule 30 described later), and the stud bolt 10 is inserted inside the cylinder. The shape of the spacer 12 is not limited to a cylinder, and may be another shape, such as a square column having a through hole. Also, the spacer 12 may not be provided.

[0034] The nut 14 (corresponding to the fastening member) is a member that presses the reinforcing plate 20 against the lower flange 2B side (the filler 50 in this embodiment) by being screwed onto the stud bolt 10. The nut 14 also has a function of closing the gap between the stud bolt 10 and an insertion hole 22a (described later) formed in the receiving portion 22 of the reinforcing plate 20. This makes it possible to prevent the filler 50 filled between the lower flange 2B and the reinforcing plate 20 from leaking.

[0035] The reinforcing plate 20 (corresponding to a plate material) is a member for reinforcing the H-shaped steel 1 (more specifically, the lower flange 2B). The reinforcing plate 20 in this embodiment is a steel plate material having a concave cross section, and has a receiving portion 22 and a dam portion 24.

[0036] The receiving portion 22 is a plate-like portion facing the lower surface of the lower flange 2B, and is a portion that receives the filler 50 filled between the lower flange 2B and the reinforcing plate 20. The receiving portion 22 is also formed with a plurality of insertion holes 22a corresponding to the stud bolts 10. The insertion holes 22a are through holes that penetrate the receiving portion 22 in the thickness direction (here, the vertical direction). The insertion holes 22a are also formed with a diameter larger than the diameter of the stud bolts 10 (for example, 2 to 3 mm larger) in consideration of manufacturing errors, installation errors, and the like. The stud bolts 10 welded to the lower flange 2B of the H-shaped steel 1 are inserted into the insertion holes 22a. Since the insertion holes 22a are larger in diameter than the stud bolts 10, a gap is generated between the insertion holes 22a and the stud bolts 10.

[0037] The dam portions 24 are portions that rise upward (toward the lower flange 2B) at both ends in the width direction of the receiving portion 22, and have the function of preventing leakage of the filler 50 filled in the space S (see FIG. 3E). By providing the dam portions 24, the filler 50 can be efficiently filled into the space S.

[0038] The filler 50 is a material having fluidity and hardening properties, and is filled between the lower flange 2B and the reinforcing plate 20. When the filler 50 hardens, the reinforcing plate 20, the stud bolt 10, the lower flange 2B, and the like are integrated, and the strength of the reinforcement can be increased as a composite material. The filler 50 is not particularly limited as long as it is a material having fluidity and hardening properties. For example, synthetic resins such as epoxy resin and phenol resin can be used. Alternatively, a material obtained by mixing a hydraulic material (cement) with water or the like (grouts such as non-shrink mortar and cement milk) may be used.

[0039] <Reinforcement method> Fig. 3A to Fig. 3E are explanatory views showing an example of a reinforcing method for forming the reinforcing structure of Fig. 1. Fig. 4A is a schematic cross-sectional view of the welded portion (before welding) in Fig. 3B, and Fig. 4B is a perspective view of insulating sleeve 32. Note that Fig. 3D and Fig. 3E show cross-sections of spacer 12.

[0040] First, as shown in FIG. 3A, a through hole 22a having a diameter larger than that of the stud bolt 10 is formed in the receiving portion 22 of the reinforcing plate 20 (corresponding to a through hole forming step), and a ferrule 30 is installed in the through hole 22a (corresponding to a ferrule installation step). The ferrule 30 is made of heat-resistant porcelain (ceramic, etc.), and blocks air during the generation of sparks (arc) in stud welding to prevent a reaction between the weld metal and the air, and also concentrates the generated heat to slow down the cooling rate. By providing such a ferrule 30, it is possible to suppress the diffusion of sparks, odors, dust, etc. generated during welding. The ferrule 30 also plays the role of a mold in the joint by trapping the molten metal generated by stud welding inside.

[0041] As shown in an enlarged cross-sectional view of a circled portion in FIG. 3A, the ferrule 30 has a surrounding portion 30a and a contact portion 30b (see also FIG. 4A).

[0042] The surrounding portion 30a is a portion that is received in the insertion hole 22a and surrounds the stud bolt 10. By receiving the surrounding portion 30a in the insertion hole 22a, the position of the ferrule 30 is less likely to shift, and shifting of the welding position can be suppressed.

[0043] The contact portion 30b is formed to have a larger diameter than the surrounding portion 30a, and is a portion that comes into contact with the base material of the weld (here, the lower flange 2B).

[0044] Then, the reinforcing plate 20 is attached to the lower flange 2B so that the ferrule 30 placed on the reinforcing plate 20 is located between the lower flange 2B and the reinforcing plate 20 (in other words, in the space S) (corresponding to a plate attaching step). More specifically, the abutment portion 30b of the ferrule 30 is abutted against the lower surface of the lower flange 2B, and the reinforcing plate 20 and the lower flange 2B are clamped and fixed with a vice (not shown) such as a clamp. By disposing the ferrule 30 (abutment portion 30b) between the reinforcing plate 20 and the lower flange 2B, a space S for welding (corresponding to a welding space) is formed between the reinforcing plate 20 and the lower flange 2B (see FIG. 3B).

[0045] Next, as shown in Fig. 3B, a covering member 34 such as aluminum tape is provided in the gap between the reinforcing plate 20 (specifically, the upper end of the dam portion 24) and the lower flange 2B to perform the curing. In this embodiment, as shown in Figs. 3B and 4A, an insulating sleeve 32 (corresponding to a fire-resistant and heat-resistant insulating material) is placed in the gap between the insertion hole 22a and the stud bolt 10. The work of providing the covering member 34 and the insulating sleeve 32 corresponds to a curing step. By performing such curing, the space S can be made into a closed space.

[0046] The insulating sleeve 32 is made of a fire-resistant and heat-resistant insulating material, and as shown in FIG. 4B, has a cylindrical portion 32a and a flange portion 32b.

[0047] The tubular portion 32a is formed in a cylindrical shape that allows it to be disposed (embedded) in the gap between the stud bolt 10 and the insertion hole 22a.

[0048] The flange portion 32b protrudes outward from the outer circumferential surface of the cylindrical portion 32a.

[0049] When the cylindrical portion 32a of the insulating sleeve 32 is inserted into the insertion hole 22a, the flange portion 32b comes into contact with the lower surface of the reinforcing plate 20 (receiving portion 22). As a result, a part of the cylindrical portion 32a is disposed (embedded) inside the insertion hole 22a. In this embodiment, the flange portion 32b of the insulating sleeve 32 is provided at the center of the cylindrical portion 32a, but this is not limited thereto. For example, the flange portion 32b may be provided at an end of the cylindrical portion 32a, and the entire cylindrical portion 32a may be embedded.

[0050] After curing, the stud bolt 10 attached to the stud gun 40 is inserted through the insulating sleeve 32, the insertion hole 22a, and the ferrule 30, and the tip of the stud bolt 10 is brought into contact with the lower surface of the lower flange 2B. Then, stud welding is performed using the stud gun 40, and the tip of the stud bolt 10 is welded to the lower flange 2B (corresponding to the welding process).

[0051] At this time, since the ferrule 30 is disposed around the tip of the stud bolt 10, it is possible to suppress the diffusion of sparks, odors, dust, etc. that are generated during stud welding. Also, an insulating sleeve 32 (specifically, a cylindrical portion 32a) is provided in the gap between the stud bolt 10 and the insertion hole 22a, and further, a protective member 34 is provided in the gap between the reinforcing plate 20 and the lower flange 2B. This makes the space S a closed space, making it possible to further suppress the diffusion of sparks, odors, dust, etc. that are generated during stud welding.

[0052] Furthermore, by embedding the insulating sleeve 32 (tubular portion 32a) in the gap between the stud bolt 10 and the insertion hole 22a, it is possible to prevent the stud bolt 10 and the reinforcing plate 20 from coming into contact with each other during stud welding. In other words, the stud bolt 10 and the reinforcing plate 20 can be insulated from each other.

[0053] In this embodiment, the reinforcing plate 20 used to reinforce the lower flange 2B functions as a curing member (curing panel), so there is no need for extensive curing, and it is not time-consuming. In addition, the stud bolt 10 is inserted into the insertion hole 22a formed in the reinforcing plate 20 actually used for reinforcement and welded, so that it is possible to suppress misalignment between the stud bolt 10 and the insertion hole 22a.

[0054] Before curing, gas (rare gas, CO2 gas, acetylene, inert gas, etc.) may be filled into the space S through the gap between the dam portion 24 of the reinforcing plate 20 and the lower flange 2B. After filling the gas, curing may be performed and then stud welding may be performed. This can improve the quality of the weld.

[0055] After welding of all the stud bolts 10 is completed, as shown in FIG. 3C, the vise (not shown) is released, the reinforcing plate 20 is removed, and the ferrules 30 are removed. Although FIG. 3C shows a state in which some of the ferrules 30 have been removed, all of the ferrules 30 are removed. This ensures that no porcelain ferrules 30 remain in the space S. The ferrules 30 after welding can be easily removed by applying a light impact. It is also desirable to check the quality of the stud welding at this stage.

[0056] Next, as shown in Fig. 3D, a metal spacer 12 is attached to the stud bolt 10, and the reinforcing plate 20 is reattached. This forms a space S (welding space) between the lower flange 2B and the reinforcing plate 20, which is the same as in Fig. 3B.

[0057] Furthermore, the nut 14 is screwed onto the stud bolt 10 for temporary tightening (corresponding to a fastening material attachment step). At this time, the gap between the stud bolt 10 and the insertion hole 22a is blocked by the nut 14. As mentioned above, the spacer 12 does not have to be provided, and for example, the position of the reinforcing plate 20 may be adjusted so that the space S is formed depending on how the nut 14 is attached (threaded) to the stud bolt 10.

[0058] 3E, filler 50 is filled into space S from between lower flange 2B and reinforcing plate 20 and hardened. At this time, since the gap between stud bolt 10 and insertion hole 22a of reinforcing plate 20 is blocked by nut 14, leakage of filler 50 can be prevented. Furthermore, since dam portion 24 is provided on reinforcing plate 20, leakage of filler 50 can be prevented.

[0059] After the filler 50 has hardened, the nut 14 is further tightened (final tightening) to press the reinforcing plate 20 against the lower flange 2B (here, the filler 50). This allows the components (lower flange 2B, reinforcing plate 20, stud bolts 10, etc.) that make up the space S to be integrated with the filler 50, improving the reinforcing strength as a composite material. In addition, in this embodiment, the reinforcing plate 20 is used as a protective panel, so that the diffusion of sparks, odors, dust, etc. that are generated during welding can be suppressed without extensive protective measures. Therefore, the impact of welding on the surroundings can be easily suppressed and strength can be improved.

[0060] As described above, the reinforcing structure of this embodiment includes the bottom flange 2B of the H-shaped steel 1, the stud bolt 10 whose upper end is welded to the bottom flange 2B, the reinforcing plate 20 which is attached between the bottom flange 2B and the bottom flange 2B with a space S therebetween and has an insertion hole 22a with a diameter larger than that of the stud bolt 10 through which the stud bolt 10 is inserted, and the nut 14 which screws onto the stud bolt 10. The space S between the bottom flange 2B and the reinforcing plate 20 is filled with a filler 50, and the nut 14 closes the gap between the stud bolt 10 and the insertion hole 22a and presses the reinforcing plate 20 against the filler 50.

[0061] As a result, by attaching the reinforcing plate 20 used for reinforcement to the lower flange 20, a space S for welding is formed between the lower flange 20 and the reinforcing plate 20, so that the diffusion of sparks, odors, dust, etc. generated during welding can be easily suppressed. In addition, each member constituting the space S can be integrated by the filler 50, and the strength of the reinforcement can be improved. Therefore, the impact of welding on the surroundings can be easily suppressed and the strength of the reinforcement can be improved.

[0062] In addition, the reinforcing plate 20 has a receiving portion 22 that receives the filler 50 and a dam portion 24 that prevents leakage of the filler 50. This makes it possible to prevent leakage of the filler 50 and to efficiently fill the filler 50.

[0063] Moreover, a material having fluidity and hardening properties (synthetic resin or grout) is used for the filler 50. This allows the filler 50 to be filled into the space S, and the respective members constituting the space S can be integrated by the filler 50 hardening.

[0064] The reinforcing method of this embodiment is a method for reinforcing the bottom flange 2B of the H-shaped steel 1 using a reinforcing plate 20 and a stud bolt 10, and includes the steps of: forming an insertion hole 22a in the receiving portion 22 of the reinforcing plate 20, the plate attachment step of attaching the reinforcing plate 20 with the insertion hole 22a formed therein so that a space S is formed between the reinforcing plate 20 and the bottom flange 20; inserting the stud bolt 10 into the insertion hole 22a in the reinforcing plate 20 and welding the tip of the stud bolt 10 to the bottom flange 20; screwing the nut 14 onto the stud bolt 10 and closing the gap between the stud bolt 10 and the insertion hole 22a with the nut 14; and filling the space S with a filler 50. This allows the use of the reinforcing plate 20 used for reinforcement to easily suppress the diffusion of sparks, odors, dust, and the like that are generated during welding. Moreover, the members constituting the space S can be integrated by the filler 50, and the reinforcement strength can be improved. Therefore, the influence of welding on the surroundings can be easily suppressed and the reinforcement strength can be improved.

[0065] In addition, before the plate attachment step, there is a ferrule installation step of installing the ferrule 30 in the insertion hole 22a of the plate 20 formed in the insertion hole formation step, and in the plate attachment step, the reinforcing plate 20 is attached to the lower flange 2 so that the ferrule 30 is located in the space S. Then, in the welding step, the stud bolt 10 is inserted through the insertion hole 22a and the ferrule 30, and after the welding step, the ferrule 30 is removed. This makes it possible to further suppress the diffusion of sparks, odors, dust, etc. that are generated during welding. Also, it is possible to prevent the ferrule 30 from remaining in the space S after welding.

[0066] In addition, a curing process is performed before the welding process to cure the gaps between the lower flange 2B and the reinforcing plate 20 and between the stud bolt 10 and the insertion hole 22a. This makes it possible to further suppress the diffusion of sparks, odors, dust, etc. that are generated during welding.

[0067] In addition, in the curing process, an insulating sleeve 32 is placed in the gap between the stud bolt 10 and the insertion hole 22a. This makes it possible to prevent the stud bolt 10 and the reinforcing plate 20 from coming into contact with each other when welding, and to insulate the stud bolt 10 from the reinforcing plate 20.

[0068] ===Other embodiments=== The above-mentioned embodiment is for facilitating understanding of the present invention, and is not intended to limit the present invention. The present invention may be modified or improved without departing from the spirit of the present invention, and it goes without saying that the present invention includes equivalents. In particular, the following embodiments are also included in the present invention.

[0069] In the above embodiment, the H-shaped steel 1 (bottom flange 2B) is exemplified as the steel material, but the steel material is not limited to the H-shaped steel, and may be other steel structures.

[0070] In the above embodiment, when reinforcing the H-shaped steel 1 (lower flange 2B) to be reinforced, welding (stud welding) is performed upward, but this is not limited to this. Also, for example, the steel material to be reinforced may be aligned vertically (for example, it may be a pillar), in which case stud welding may be performed horizontally (horizontally). [Explanation of symbols]

[0071] 1 H-beam 2 Flanges 2A Upper flange 2B Bottom flange (steel) 4. Web 10 Stud bolt (bar material) 12 Spacer 14 Nut (fastening material) 20 Reinforcement plate (plate material) 22 Receiving part 22a Insertion hole 24 Weir 30 Ferrule 30a Enclosure 30b Contact part 32 Insulating sleeve (fire-resistant and heat-resistant insulating material) 32a Cylinder part 32b Tsubabe 34 Covering materials 40 Stud Gun S space (welding space)

Claims

1. Steel and A bar material having a tip welded to the steel material; a plate material attached to the steel material with a welded space therebetween, the plate material having an insertion hole with a diameter larger than that of the bar material through which the bar material is inserted; A fastening member that is screwed onto the bar material; A reinforcing structure having The welding space between the steel material and the plate material is filled with a filler material, the fastening material closes a gap between the bar material and the insertion hole and presses the plate material against the filler material, The plate material is A receiving portion for receiving the filler; A dam portion for preventing leakage of the filling material; A reinforcing structure comprising:

2. The reinforcing structure according to claim 1, The filler has flowability and hardenability. A reinforcing structure characterized by:

3. A method for reinforcing a steel material using a plate material and a bar material, comprising the steps of: a through-hole forming step of forming a through-hole in the plate material having a diameter larger than that of the bar material; a plate material attachment process of attaching the plate material having the insertion hole formed therein so that a welding space is formed between the plate material and the steel material; a welding process of inserting the bar material into the insertion hole of the plate material and welding a tip of the bar material to the steel material; a fastening member attachment step of screwing a fastening member onto the bar member to close a gap between the bar member and the insertion hole with the fastening member; a filling step of filling the weld space with a filler; A reinforcing method comprising the steps of:

4. A reinforcing method according to claim 3, comprising: a ferrule installation step of installing a ferrule in the insertion hole of the plate material before the plate material attachment step, In the plate material attachment step, the plate material is attached to the steel material so that the ferrule is positioned in the welding space, In the welding step, the rod is inserted through the insertion hole and the ferrule, removing the ferrule after the welding step. A reinforcing method comprising:

5. A reinforcing method according to claim 3 or claim 4, comprising: A curing process is provided before the welding process, in which a gap between the steel material and the plate material and a gap between the bar material and the insertion hole are cured. A reinforcing method comprising:

6. A reinforcing method according to claim 5, comprising: In the curing step, a fire-resistant and heat-resistant insulating material is placed in the gap between the rod and the insertion hole. A reinforcing method comprising:

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