JP2023149166A - Reinforcement connection part structure for existing frame member - Google Patents

Abstract

To provide a reinforcement connection part structure that reinforces by a reinforcement member by fitting a joint metal for connecting the reinforcement member such as a brace member to a connection part by non-welding on an existing steel frame member forming a frame structure of a building.SOLUTION: A reinforcement connection part structure is constituted by including a rectangular annular frame hardware 12 installed so as to surround a connection part 51a and a cement-based solidification material 17, which engulfs a steel frame member 52 and is placed in the inside of the rectangular annular frame hardware 12. A plurality of stud members 13 are fitted so as to protrude from a surface of a steel frame member 51 of the connection part 51a. The rectangular annular frame hardware 12 and the cement-based solidification material 17 are constructed by non-welding and fixed around the steel frame member 51 of the connection part 51a at a construction site. A reinforcement member 20 is connected by non-welding to a joint metal 11 of the rectangular annular frame hardware 12, and the reinforcement member 20 is integrally connected to the steel frame member 52.SELECTED DRAWING: Figure 2

Description

The present invention relates to a connecting part structure for reinforcing existing frame members, and in particular, the present invention relates to a connecting part structure for reinforcing existing frame members, and in particular, for connecting reinforcing members to and reinforcing existing steel frame members forming the frame structure of an existing building. This invention relates to a reinforcing joint structure.

In recent years, in existing buildings, there are cases where it is necessary to strengthen the frame structure, which is the part that supports the load, in order to prevent aging and improve earthquake resistance. As a means for reinforcing the structure, construction methods and structures are used in which steel reinforcing members such as brace materials and frame materials are integrally connected to the existing frame structure for reinforcement. In construction methods and structures that are reinforced using such reinforcing members, reinforcing work is generally performed by attaching metal fittings, such as gusset plates, to the steel frame members (steel frame members) that make up the frame structure of an existing building. At the construction site, the reinforcing member is attached by welding or the like, and the reinforcing member is integrally connected to the frame structure via these joints.

In addition, for example, if the existing building to be reinforced is a factory or other facility, and reinforcement work is carried out while the building is still in operation or in use, welding or other firearms may be used. It is considered inappropriate to attach metal fittings to steel frame members, so by attaching metal fittings without using firearms or welding, the existing building frame structure can be replaced with braces, etc. Methods and structures for reinforcing with reinforcing members have also been proposed (for example, see Patent Document 1 and Patent Document 2).

According to the methods and structures disclosed in Patent Document 1 and Patent Document 2, for reinforcing the frame structure of an existing building without welding using reinforcing members such as brace materials, the reinforcing method of Patent Document 1 does not require welding. A part of the gusset plate, which is a hardware, is glued to a column or beam, which is a steel frame member, and the gusset plate and the opposing plate are held together with the column or beam being sandwiched between the gusset plate and the opposing plate. By connecting with bolts, the gusset plate to which the reinforcing member such as the brace material is connected is prevented from peeling off. In addition, in the reinforcement structure of Patent Document 2, a pair of steel plates to which gusset plates are joined in advance are opposed to each other so as to sandwich the column or beam, and the pair is brought into contact with the column or beam. By tightening the steel plate with the bolt member, the gusset plate to which the reinforcing member such as the brace member is connected is firmly fixed to the column or beam member.

Japanese Patent Application Publication No. 2013-177797 Japanese Patent Application Publication No. 2016-153582

However, according to the methods and structures disclosed in Patent Document 1 and Patent Document 2 for reinforcing the frame structure of an existing building using reinforcing members such as brace materials without welding, gusset plates and opposing plates, or A pair of steel plates to which gusset plates have been joined in advance are connected by firmly tightening the bolt members with a column or beam sandwiched between them, so that the gusset plates, which are the joining hardware, can be attached to the column or beam. The reinforcing member is fixed to the beam material, and as a result, excessive stress is likely to be generated due to the strong clamping force in the steel frame member at the portion where the gusset plate is attached and the reinforcing member is connected. For this reason, when reinforcing the frame structure of an existing aging building using reinforcing members such as braces, the stress generated in the parts of the aging existing steel frame member where the reinforcing members are connected is , it is conceivable that a stable reinforced structure cannot be obtained.

The present invention enables the joining of reinforcing members such as braces to existing steel frame members that form the frame structure of existing buildings without welding, without creating stress due to tightening force. It is an object of the present invention to provide a connecting part structure for reinforcing an existing frame member, which can be attached to a connecting part to stably reinforce the frame structure of an existing building with a reinforcing member.

The present invention relates to an existing frame member that is employed when reinforcing the frame structure of an existing building by connecting a reinforcing member such as a brace material or a frame material to an existing steel frame member that forms the frame structure of an existing building. In the reinforcing connecting part structure, the joining part with the reinforcing member is installed so as to surround the connecting part of the reinforcing member in the steel frame member in a rectangular shape, and is attached by protruding outward from the side part. a rectangular annular frame metal fitting, a plurality of stud members protruding from the surface of the steel frame member of the connecting portion, and a plurality of stud members attached to the steel frame member of the connecting portion so as to wrap around the rectangular annular frame metal member; The cement-based solidifying material is filled and solidified inside the frame hardware, and the joining hardware is integrally joined in advance to the side surface of the rectangular annular frame hardware before construction at the construction site. At the construction site, the rectangular annular frame hardware and the cement solidifying material are constructed without welding and fixed around the steel frame member of the connection part, and the rectangular annular The reinforcing member is connected to the joining hardware of the frame metal without welding, and the reinforcing member is integrally joined to the steel frame member, thereby reinforcing the frame structure by the steel frame member. The above object has been achieved by providing a connecting structure for reinforcing frame members.

In the connecting part structure for reinforcing existing frame members of the present invention, the stud member is fixed to the steel frame member in the connecting part through a fixing hole drilled and formed by a bolt member or a rivet. Preferably, it is made of a member.

Further, in the reinforcing connection structure for existing frame members of the present invention, the steel frame member is made of H-beam steel or I-beam steel, and the stud member is formed by drilling into the rib portion of these steel members. Preferably, the bolt member is fastened to the fixing hole.

Furthermore, in the connecting part structure for reinforcing an existing frame member of the present invention, it is preferable that the joining hardware is a gusset plate in which bolt fastening holes are formed in advance.

Furthermore, in the joint structure for reinforcing existing frame members of the present invention, it is preferable that the cement solidifying material is non-shrinkage mortar.

According to the connecting part structure for reinforcing existing frame members of the present invention, a joint metal fitting to which a reinforcing member such as a brace member is connected to an existing steel frame member forming the frame structure of an existing building can be connected by tightening force. The reinforcing member can be attached to the connecting portion of the reinforcing member without welding without stress, and the frame structure of an existing building can be stably reinforced by the reinforcing member.

FIG. 2 is a schematic front view illustrating a frame structure reinforced using the reinforcing connection structure for an existing frame member according to a first preferred embodiment of the present invention. FIG. 2 is an enlarged view of part A in FIG. 1 illustrating a reinforcing connection structure for an existing frame member according to a first preferred embodiment of the present invention. FIG. 3 is a sectional view taken along line BB in FIG. 2, illustrating a structure of a reinforcing connection part for an existing frame member according to an eleventh preferred embodiment of the present invention. 1A is an enlarged view of part A in FIG. 1, and FIG. 1B is a sectional view taken along line CC in FIG. FIG. 7 is a schematic side view illustrating a frame structure reinforced using the reinforcing connecting part structure for an existing frame member according to a second embodiment. (a) is an enlarged view of section D in FIG. 5, and (b) is a sectional view taken along line EE in (a). (a) is a schematic side view illustrating a frame structure reinforced using another form of reinforcing joint structure, and (b) is an enlarged sectional view of section G along FF in (a). .

A reinforcing joint structure 10 for existing frame members according to a first preferred embodiment of the present invention is used as a frame structure 50 of an old existing building, for example, as shown in FIG. A frame structure 50 made up of a plurality of pillar members 51 arranged at intervals in the direction and extending in the vertical direction, and a plurality of beam members 52 arranged at intervals in the longitudinal direction and extended in the horizontal direction, A connection for connecting the reinforcing member 20 to the column member 51, which is preferably a steel frame member forming the frame structure 50, without welding, so that the reinforcing member 20 can be effectively reinforced using the reinforcing member 20, for example, a brace material. This was adopted as the structure of the department.

In the first embodiment, the frame structure 50 of an aging existing building is preferably formed by assembling H-beams 53 as steel frame members forming pillars 51. In the reinforcing joint structure 10 of the present embodiment, a brace material (reinforcing member) 20 is provided in a portion of a column 51 made of H-shaped steel 53 forming a frame structure 50, in a portion close to a joint 54 with a beam material 52. As shown in FIGS. 2 and 3, the joint 11 to which the brace material 20 is to be joined is attached to the connecting portion 51a without welding, without causing stress due to tightening force. This was adopted as a structure for the reinforcing connecting part to make this possible.

The reinforcing connection structure 10 for existing frame members according to the first embodiment includes column members 51 which are existing steel frame members preferably made of H-beams 53 and which form a frame structure 50 of an existing building. This is a reinforcing joint structure that is employed when reinforcing the frame structure 50 by connecting reinforcing members, preferably made of brace materials 20, as shown in FIGS. 2 and 3. A rectangular annular frame metal fitting 12 is installed to surround the connecting part 51a of the reinforcing member 20 in a rectangular shape, and the connecting metal fitting 11 to the reinforcing member 20 is attached so as to protrude outward from the side surface 12a, and the connecting part 51a The inside of the rectangular annular frame metal fitting 12 was filled and solidified so as to involve the plurality of stud members 13 attached to protrude from the surface of the pillar material 51 (see FIG. 3) and the pillar material 51 of the connecting portion 51a. It is configured to include a cement-based solidifying material 17. The joining hardware 11 is integrally joined to the side surface 12a of the rectangular annular frame hardware 12 in advance at a factory or the like before construction at the construction site. At the construction site, the rectangular annular frame metal fitting 12 and the cement-based solidifying material 17 are constructed without welding and fixed around the column material 51 of the connecting portion 51a, and a brace is attached to the joint metal fitting 11 of the rectangular annular frame metal fitting 12. The members 20 are connected without welding, and the brace member 20 is integrally joined to the column member 51, thereby reinforcing the frame structure 50 made up of the column member 51 and the beam member 52.

Further, in the first embodiment, the stud member 13 is preferably a bolt member or a rivet member fixed to the column member 51 made of the H-shaped steel 53 in the connecting portion 51a through a fixing hole drilled and formed. (In this embodiment, a bolt member) 18 is used. The joining hardware 11 protruding from the side surface 12a of the rectangular annular frame hardware 12 is preferably a gusset plate in which bolt fastening holes are formed in advance.

In the first embodiment, the pillars 51, which are steel frame members made of H-beams 53, forming the frame structure 50 of an aging existing building are spaced at predetermined intervals in the lateral direction, as shown in FIG. A plurality of these are arranged in parallel and extended in the vertical direction. The pillars 51 are assembled in a lattice shape with a plurality of beams 52 that are arranged in parallel with a predetermined center-to-center spacing in the vertical direction and are installed to extend in the horizontal direction. An existing framework structure 50 is formed. The beam material 52 is preferably a steel frame member made of I-shaped steel 55. The reinforcing joint structure 10 of the first embodiment preferably has chevron-shaped structures arranged in a diagonal direction inside the rectangular lattice frame of the frame structure 50 made up of the pillar materials 51 and the beam materials 52. A joint for connecting the ends of the brace members 20 to the column members 51 without welding and joining them as one body so that the frame structure 50 can be effectively reinforced by the pair of brace members 20, which are reinforcing members made of steel 56. The structure is such that the hardware 11 can be stably fixed to the connecting portion 51a of the brace material 20 on the pillar material 51 without welding.

Further, in the first embodiment, the pair of brace members 20, which are reinforcing members, are arranged to intersect diagonally inside the rectangular lattice frame of the frame structure 50. The brace material 20, which is a reinforcing member, is connected to the pillar material 51 via the reinforcing joint structure 10 of this embodiment, with a portion of the pillar material 51 that is close to the joint 54 with the beam material 52 as a connecting portion 51a. By doing so, the frame structure 50 can be effectively reinforced without welding.

As shown in FIGS. 2 and 3, the rectangular annular frame hardware 12 constituting the reinforcing joint structure 10 of the first embodiment includes a pair of first frame hardware disposed on one opposing side. 14, and a pair of second frame hardware 15 disposed on the other opposing sides. The pair of first frame metal fittings 14 are each made of, for example, channel steel, and the flat plate parts 14a are arranged to face each other in parallel with an interval, and from the side edges on both sides of each flat plate part 14a, It is attached with the overhanging rib portion 14b protruding outward (see FIG. 3). A plurality of bolt fastening holes are formed in the overhanging rib portion 14b.

Further, on the outer surface of the flat plate portion 14a of each first frame hardware 14 on the side from which the overhanging rib portion 14b projects, the outer surface is used as the side surface portion 12a of the rectangular annular frame hardware 12, and the center of this in the width direction is provided. Preferably, a gusset plate, which is a metal fitting 11 to be connected to the brace member 20, is attached to the portion so as to extend perpendicularly from the flat plate portion 14a along a plane parallel to the overhanging rib portion 14b. The joining hardware 11 using the gusset plate is integrally joined to the flat plate portion 14a of the first frame hardware 14 in a factory or the like before being transported to the construction site. In this embodiment, the gusset plate 11 has a vertical width similar to the vertical width of the flat plate part 14a at the base end portion joined to the flat plate part 14a of the first frame hardware 14, and has a vertical width in the diagonal direction of the lattice frame. It has a substantially triangular side surface shape with a truncated tip and a vertical width that gradually decreases towards the end. The gusset plate 11 has a plurality of bolt fastening holes arranged along the diagonal direction of the lattice frame.

Each of the pair of second frame hardware 15 is made of, for example, a steel plate, has a vertical width similar to the vertical width of the flat plate portion 14a of the first frame hardware 14, and has a pair of first frame hardware arranged at an interval. It has a rectangular side surface shape with a width that spans the overhanging rib portion 14b of the frame hardware 14. A plurality of bolt fastening holes are formed in the side edge portions on both sides of each of the second frame hardware 15 at positions corresponding to the plurality of bolt fastening holes formed in the overhanging rib portion 14b of the first frame hardware 14. has been done.

The pair of first frame hardware 14 and the pair of second frame hardware 15 are installed so as to surround the connecting portion 51a of the reinforcing member 20 in the column 51 in a rectangular shape. That is, in the pair of first frame hardware 14, the flat plate portion 14a is arranged in parallel with the pair of flange portions 53a of the H-shaped steel 53 that constitutes the column 51, and there is a gap between the flat plate portion 14a and the flange portion 53a. Preferably, they can be assembled with a distance of 50 mm or less maintained. The pair of second frame hardware 15 is arranged parallel to the rib portion 53b of the H-shaped steel 53 constituting the column 51, and there is preferably a distance of 60 mm or less between the pair of second frame hardware 15 and the end of the flange portion 53a of the H-shaped steel 53. A state where the side edge portions on both sides in which the bolt fastening holes are formed are superimposed from the outside on the overhanging rib portions 14b in which the bolt fastening holes of the pair of first frame metal fittings 14 are formed while maintaining the spacing. And it can be assembled. A pair of first frame metal fittings 14 and a pair of second frame metal fittings 15, which are assembled in a rectangular manner surrounding the connecting portion 51a of the reinforcing member 20 in the pillar material 51, are placed on the side of the overlapping second frame metal fittings 15. By aligning the bolt fastening holes in the edge portion with the bolt fastening holes in the overhanging rib portion 14b of the first frame metal fitting 14 and tightening the fixing bolts 16, these are integrated into the column material 51. To form a rectangular annular frame metal fitting 12 that is installed so as to surround the connecting portion 51a of the reinforcing member 20 in a rectangular shape, and the joining metal fitting 11 to the reinforcing member 20 is attached so as to protrude outward from the side surface 12a. become.

In the first embodiment, the rectangular annular frame hardware 12 formed by the pair of first frame hardware 14 and the pair of second frame hardware 15 is connected to the joint 54 of the pillar material 51 with the lower beam material 52 in FIG. 1, for example. In the adjacent connecting portion 51a, for example, a floor slab 57 (see FIG. 2) mounted on the lower beam 52 can be used as a base and assembled above this. (See Figure 3). In addition, in the connecting portion 51a of the column 51 that is close to the joint 54 with the upper beam 52, the rectangular annular frame hardware 12 is supported by the column 51, for example, and can be fixed without welding by using various known fixing hardware. The installed base plate (not shown) is used as a base, and the upright state shown in FIG. 3 is an inverted state with the top and bottom upside down, and it can be assembled above the base. There is. The floor slab 57 and base plate, which serve as the base of the rectangular annular metal frame 12, can be used as the bottom formwork of the rectangular annular metal frame 12 when filling the inside of the rectangular annular metal frame 12 with the cement-based solidifying material 17. I can do it.

In the first embodiment, the plurality of stud members 13 protruding from the surface of the column 51 at the connection portion 51a of the brace member 20 are attached to the column 51 made of the H-shaped steel 53 of the connection portion 51a, as described above. A plurality of bolt members 18 are fixed through fixing holes formed by a drill. The stud member 13 formed by the bolt member 18 is inserted into a plurality of fixing holes that are formed without welding, preferably in the rib portion 53b of the H-shaped steel 53 of the connecting portion 51a, using, for example, a known drill. They can be easily attached by tightening and fixing them respectively. Moreover, this allows the surface of the rib portion 53b to be used as the surface of the connecting portion 51a of the pillar member 51, and the plurality of stud members 13 made of bolt members 19 can be easily attached in a state in which they protrude from the surface of the rib portion 53b. Become. This work of attaching the stud member 13 using the bolt member 18 to the rib portion 53b of the H-shaped steel 53 of the connecting portion 51a is preferably carried out by attaching a pair of first frame hardware 14 around the H-shaped steel 53 of the connecting portion 51a. This can be performed prior to the work of assembling the pair of second frame hardware 15 and attaching the rectangular annular frame hardware 12.

For example, various kinds of concrete or mortar may be used as the cement-based solidifying material 17 that is filled and solidified inside the rectangular annular frame metal fitting 12 attached around the H-shaped steel 53 in the connecting portion 51a as described above. I can do it. From the viewpoint of improving workability and quality after solidification when filling the inside of the rectangular annular metal frame 12, it is preferable to use various known non-shrink mortars as the cement solidifying material 17.

The cement-based solidifying material 17 such as non-shrinkage mortar is filled into the inside of the rectangular annular frame metal fitting 12 without any welding and without any gaps by, for example, manually wrapping the H-beam 53 of the connecting portion 51a inside the rectangular annular frame metal fitting 12. After that, by solidifying, the brace material 20 can be easily fixed around the connecting portion 51a of the column material 51 made of the H-shaped steel 53. Furthermore, as the filled cementitious solidifying material 17 solidifies, the rectangular annular frame metal fitting 12 is also fixed as one body around the connecting portion 51a of the brace material 20 in the column material 51 made of the H-shaped steel 53. It turns out. As a result, the connecting part structure 10 for reinforcing existing frame members of the first embodiment is capable of reinforcing the frame structure 50 by connecting the brace material 20 to the joint metal fittings 11 of the rectangular annular frame metal fittings 12. , will be formed.

In the first embodiment, the reinforcing member made of the brace material 20 is attached to the end portion of the brace material 20 at the construction site to the joint metal fitting made of the gusset plate 11 of the rectangular annular frame metal fitting 12 that constitutes the reinforcing joint structure 10. By aligning the formed bolt fastening holes with the bolt fastening holes formed in the gusset plate 11 and tightening the fixing bolts 16, the brace material 20 is attached to the joint metal fitting 11 of the rectangular annular frame metal fitting 12. , they can be easily connected without welding. This makes it possible to easily join the brace members 20, preferably a pair of brace members 20, as one body to the pillar members 51 in a crossed state inside the rectangular lattice frame of the frame structure 50, and to connect the pillar members 51 and the beams. The framework structure 50 of the material 52 is effectively reinforced by the brace material 20.

According to the connecting part structure 10 for reinforcing existing frame members of the first embodiment having the above-described configuration, the reinforcing member by the brace material 20 is connected to the column material 51 forming the frame structure 50 of the existing building. The joint hardware 11 to be attached is attached to the connecting part 51a of the brace material 20 without welding without causing stress due to tightening force, and the frame structure 50 of the existing building is stably reinforced by the brace material 20. becomes possible.

That is, according to the first embodiment, the reinforcing joint structure 10 has the joining hardware 11 installed surrounding the connecting portion 51a of the brace material 20 in the column 51 made of the H-shaped steel 53, which is joined in advance. It is configured to include a rectangular annular metal frame 12 and a cement-based solidifying material 17 filled and solidified inside the rectangular annular metal frame 12. As a result, at the construction site, the rectangular annular frame metal fitting 12 to which the joining metal fittings 11 have been joined in advance can be fixed around the column material 51, which is a steel frame member, without welding. In addition, the rectangular annular frame metal fitting 12 allows the connecting portion 51a of the brace material 20 in the column material 51 to be connected to the column material 51 without causing stress due to the tightening force in the column material 51 due to the cement solidified material 17 filled and solidified inside the rectangular annular frame metal fitting 12. Since the cement-based solidifying material 17 is used to firmly join the joint metal 11 of the rectangular annular frame metal 12 integrally to the column 51 of the connecting portion 51a, the brace material serving as a reinforcing member is 20 are connected without welding, and the frame structure 50 of the existing building is stably and strongly reinforced by the brace material 20 through the rectangular annular frame metal fitting 12 and the cement solidifying material 17. becomes possible.

In addition, in the reinforcing joint structure 10 of the present embodiment, a plurality of stud members 13 formed by bolt members 18 protrude from the surface of the rib portion 53b of the H-beam 53, which is the surface of the column 51 of the joint portion 51a. It is placed prominently. As a result, when a force in a shearing direction is applied between the rectangular annular frame metal fitting 12 whose inside is filled with the cement-based solidifying material 17 and the pillar material 51 of the connecting portion 51a, these stud members 13 makes it possible to effectively exert bearing resistance through the cement-based solidifying material 17. Moreover, this improves the adhesion strength of the cement-based solidifying material 17, and the rectangular annular frame metal fitting 12 is more firmly integrated with the H-shaped steel 53 of the connecting portion 51a of the column 51, to which the brace material 20 is connected. Therefore, the existing building frame structure 50 can be effectively reinforced with the brace material 20 in a more stable state. From the viewpoint of improving such adhesion strength, it is preferable to provide a plurality of protrusions also on the inner surface of the rectangular annular metal frame 12, for example.

Furthermore, in this embodiment, the plurality of stud members 13 made of the bolt members 18 are formed in the rib portion 53b by forming fixing holes using a drill in the rib portion 53b of the H-shaped steel 53 that constitutes the column material 51. Since it is provided by tightening and fixing the bolt members 18 to the respective fixing holes, there is no need to form fixing holes in the flange portion 53a that mainly bears stress in the H-section steel 53 and cause cross-sectional defects. The brace material 20 makes it possible to reinforce the frame structure 50 using the column material 51 made of the H-shaped steel 53 in a more stable state.

FIGS. 4(a) and 4(b) illustrate another form of reinforcing joint structure 10'. In the reinforcing joint structure 10' shown in FIGS. 4(a) and 4(b), both the pair of first frame hardware 14' and the pair of second frame hardware 15' forming the rectangular annular frame hardware 12' are The first frame hardware 14', which is made of channel steel and to which the gusset plate 11' is previously joined as a joining hardware, is attached to the flange portion 53a of the H-shaped steel 53 constituting the column 51 in surface contact with no gap. At the same time, the second frame hardware 15' is attached to the end of the flange portion 53a of the H-shaped steel 53 in contact with the end. Further, the cement-based solidifying material 17' is filled and solidified only in the area surrounded by the flange portion 53a and rib portion 53b of the H-shaped steel 53, and the second frame hardware 15', inside the rectangular annular frame hardware 12'. ing.

In the other reinforcing joint structure 10' shown in FIGS. 4(a) and 4(b), the rectangular annular frame metal fitting 12' including the gusset plate 11' causes stress due to the tightening force to be generated in the column material 51. The bolt member 18 is firmly and integrally joined to the connecting portion 51a of the brace member 20 in the column member 51 via the cement solidifying material 17', and protrudes from the surface of the column member 51 in the connecting portion 51a. Since the stud member 13 is attached, the same effects as those of the above-mentioned reinforcing joint structure 10 can be achieved.

FIGS. 5, 6(a) and 6(b) show a reinforcing connection structure 30 for an existing frame member according to a second embodiment of the present invention. The reinforcing joint structure 30 of the second embodiment is such that, for example, a column 58 made of H-shaped steel 59 that forms the frame structure of an old, existing building can be effectively reinforced by a reinforcing member 31 preferably made of a frame material. In addition, the frame member 31 is employed as a connecting portion structure for connecting the frame member 31 to the column member 58, which is a steel frame member forming a frame structure, without welding.

In the second embodiment, the frame material 31, which is a reinforcing member, is installed in a stable state by assembling it from the floor of an existing building. The frame material 31 connects the reinforcing joint structure 30 to the distal end of the horizontal frame 31a, which is provided so as to protrude laterally toward the pillar material 58 made of the H-shaped steel 59 to be reinforced, which constitutes the frame material 31. The frame structure using the column material 58 can be reinforced in a stable state by being connected without welding by the bolt member 34 to the gusset plate 33, which is a joint metal fitting previously joined to the constituent rectangular annular frame metal fitting 32. It looks like this.

In the reinforcing joint structure 30 of the second embodiment, a rectangular annular frame metal fitting 32 is installed to surround the connecting portion 58a of the frame member 31 in the column member 58, which is a steel frame member, in a rectangular shape. There is. The rectangular annular metal frame 32 is formed by assembling a first metal frame 35 made of channel steel and a second metal frame 36 having a U-shaped cross section, and protrudes from the outer surface of the second metal frame 36. A rectangular gusset plate 33, which is a metal fitting for joining the frame material 31, is attached. Further, in the connecting portion 58a, a stud member 37 made of a plurality of bolt members is attached to protrude from the surface of the rib portion 59b of the H-shaped steel 59 forming the column member 58. The inside of the rectangular annular metal frame 32 is filled with a cement-based solidifying material 38 and solidified so as to wrap around the pillar material 58 of the connecting portion 58a. The gusset plate 33, which is a joining hardware, is integrally joined in advance to the side surface of the rectangular annular frame hardware 32 before construction at the construction site.

Also with the reinforcing connection structure 30 of the second embodiment, the rectangular annular frame metal fitting 32 provided with the gusset plate 33 connects the frame material 31 in the column material 58 without causing stress due to the tightening force in the column material 58. The stud member 37 made of a bolt member is attached to the portion 58a, which is firmly connected to the portion 58a via the cement-based solidifying material 38, and protrudes from the surface of the pillar material 58 in the connecting portion 58a. The same effects as the reinforcing joint structure 10 of the embodiment are achieved.

Note that the present invention is not limited to the above embodiments, and can be modified in various ways. For example, the joining hardware of rectangular annular frame hardware to which reinforcing members are connected does not necessarily have to be a gusset plate with bolt holes formed in advance, and reinforcing members made of brace materials, frame materials, etc. can be connected without welding. Various other known joining metal fittings that can be used may also be used. In addition to the bolt member, the stud member can be provided using various other hardware that can effectively exert bearing pressure resistance through a cement-based solidifying material. The cement solidifying material that is filled and hardened inside the rectangular annular metal frame does not necessarily have to be non-shrinkage mortar, and may be any other various cement solidifying materials such as concrete or cement milk.

Further, the steel frame members forming the frame structure reinforced using the reinforcing joint structure of the present invention may be beam materials or the like other than column materials. The steel frame members constituting the frame structure to be reinforced do not necessarily have to be made of H-beam steel; for example, as shown in FIGS. It may be a steel frame member.

In FIGS. 7A and 7B, the steel frame members are pillar members 48 made of square steel pipes 47, and the reinforcing members are frame members 49. In addition, the rectangular annular frame hardware 41 forming the reinforcing joint structure 40 is formed by cutting or welding a square steel pipe larger than the square steel pipe 47 forming the column material 48. A joining metal fitting 43 is provided. A rivet member 44 protrudes from the surface of a connecting portion 48a of a frame member 49 in a column member 48 made of a square steel pipe 47, and is fixed without welding through a fixing hole drilled and formed, and protrudes as a stud member. ing. A plurality of bolt members 45 are attached to the rectangular annular frame metal fitting 41, so that a projection formed by the bolt members 45 is provided to protrude from the inner surface. The inside of the rectangular annular metal frame 41 is filled and solidified with a cement-based solidifying material 46 so as to wrap around the pillar material 48 of the connecting portion 48a. A reinforcing joint structure 40 is formed by these. A frame material 49 is connected without welding to the joint metal fittings 43 of the rectangular annular frame metal fittings 41 of the formed reinforcing joint structure 40, so that the frame structure using the column materials 48 can be effectively reinforced. It has become.

10, 10', 30, 40 Reinforcement connection structure 11, 11', 33, 43 Gusset plate (joint hardware)
12, 32, 41 Rectangular annular frame hardware 12a Side parts 13, 37 Stud members 14, 14', 35 First frame hardware 14a Flat plate part 14b Overhanging rib parts 15, 36 Second frame hardware 16 Fixing bolts 17, 17', 38 , 46 Cement-based solidifying material 18, 19, 34, 45 Bolt member 20 Brace material (reinforcing member)
31,49 Frame material (reinforcement member)
31a Horizontal frame 44 Rivet member (stud member)
47 Square steel pipe (steel frame member)
50 Frame structure 51, 48, 58 Column material (steel frame member)
51a, 48a, 58a Connecting portion 52 Beam material (steel frame member)
53,59 H-shaped steel (steel frame member)
53a, 59a Flange parts 53b, 59b Rib part 54 Joint part with beam material 55 I-shaped steel (steel frame member)
56 Angle steel (reinforcement member)
57 Floor slab

Claims (5)

A reinforcing connection for existing frame members that is used when reinforcing the frame structure by connecting reinforcing members such as brace materials or frame materials to the existing steel frame members that form the frame structure of an existing building. A partial structure,
a rectangular annular frame metal fitting installed in a rectangular manner surrounding a connecting portion of the reinforcing member in the steel frame member, and having a joining metal fitting with the reinforcing member protruding outward from a side surface; A plurality of stud members attached to protrude from the surface of the steel frame member of the connecting portion and the steel frame member of the connecting portion are filled and solidified inside the rectangular annular frame metal fitting. and a cement-based solidifying material, and the joining hardware is integrally joined in advance to the side surface of the rectangular annular frame hardware before construction at the construction site,
At the construction site, the rectangular annular metal frame and the cement-based solidifying material are constructed without welding and fixed around the steel frame member of the connecting portion, and are attached to the joint metal of the rectangular annular frame. A reinforcing connection portion of an existing frame member in which the reinforcing member is connected without welding and the reinforcing member is integrally joined to the steel frame member, thereby reinforcing the frame structure by the steel frame member. structure. 2. The existing frame member according to claim 1, wherein the stud member is a bolt member or a rivet member fixed through a fixing hole drilled in the steel frame member in the connecting portion. Reinforcement connection structure. The steel frame member is made of H-beam steel or I-beam steel, and the stud member is a bolt member that is fastened to a fixing hole drilled in a rib portion of the steel material. 3. The connecting part structure for reinforcing an existing frame member according to claim 2. The connecting part structure for reinforcing existing frame members according to any one of claims 1 to 3, wherein the joining hardware is a gusset plate in which bolt fastening holes are formed in advance. The joint structure for reinforcing existing frame members according to any one of claims 1 to 4, wherein the cement solidifying material is non-shrinkage mortar.

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