Steel frame building structure

Abstract

This invention provides a steel frame building structure in which gusset plates are joined to the side of an H-shaped steel beam without using high-strength bolts, and eccentric bending is less likely to occur in the lateral stiffeners provided on one side of the gusset plates. [Solution] In the steel frame building structure 8, the end of a transverse stiffener 2 made of lip channel steel is joined to the beam-side end plate 11 of the H-shaped steel beam 1 via a connecting member 3. The connecting member 3 comprises a connecting end plate 31 fastened and fixed to the beam-side end plate 11 by bolts and nuts 41, a gusset plate 32 on which the connecting surface portion 2b of the transverse stiffener 2 is welded and fixed to one side, with its end abutting the surface of the connecting end plate 31 and welded to the connecting end plate 31, and a brace sheet 33 welded to the connecting end plate 31 and the gusset plate 32 in a horizontal position.

Description

Technical Field

[0001] This invention relates to a steel building structure in which the end of a lateral bracing member is joined to the side surface of a steel beam.

Background Art

[0002] As shown in FIG. 5, it is conceivable to adopt a steel building structure 9 in which the end of a lateral bracing member 92 is joined to the side surface of an H-shaped steel beam 91. In this steel building structure 9, a gusset plate 93 is fixed to the H-shaped steel beam 91 by welding, and the lateral bracing member 92 is fixed to one side of the indoor protruding portion 93a of the gusset plate 93 by bolts 94 and is arranged eccentrically from the module core of the building. As these bolts 94, high-strength bolts are used to prevent slippage between the indoor protruding portion 93a and the lateral bracing member 92.

[0003] Note that Patent Document 1 discloses a steel building structure in which a gusset plate protrudes from the side surface of an H-shaped steel beam, and channel steels are joined to each surface of this gusset plate.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the above high-strength bolt joining structure, friction surface treatment and dedicated tools are required. When this is used in a house, the house price may become high. Further, since the lateral bracing member 92 is arranged eccentrically from the module core of the building, there is a risk of eccentric bending and a decrease in the strength of the lateral bracing member 92. Also, in a structure in which channel steels are joined to both surfaces of a gusset plate as in Patent Document 1, the house price becomes relatively high.

[0006] In view of the above circumstances, this invention aims to provide a steel frame building structure in which a gusset plate is joined to the side of a steel beam without using high-strength bolts, and in which eccentric bending is less likely to occur in the lateral stiffener provided on one side of the gusset plate. [Means for solving the problem]

[0007] The steel frame building structure according to this invention, in order to solve the above problems, is a steel frame building structure in which the end of a transverse stiffener having opposing surfaces located vertically and a vertically arranged connecting surface connecting the opposing surfaces is joined to the web of the steel beam or to a beam-side end plate fixed to the upper and lower flanges of the steel beam via a connecting member, The above-mentioned joining member is A connecting end plate fastened and secured to the web or beam-side end plate by a fastening member, A gusset plate is provided, in which the connecting surface portion of the above-mentioned lateral stiffener is welded and fixed to one side, and the end of the gusset plate is abutted against the surface of the above-mentioned joining end plate and welded and fixed to the said joining end plate, A brace sheet is welded and fixed horizontally to the above-mentioned joint end plate and gusset plate, It is characterized by being equipped with [the following features].

[0008] With the above configuration, the joining end plate is fastened and fixed to the web or the beam-side end plate by the fastening member, eliminating the need for a structure that joins the gusset plate to the steel beam side using high-strength bolts. This eliminates the need for friction surface treatment and specialized tools required when using high-strength bolts, making it easier to provide residential buildings at a reasonable price. Furthermore, although the lateral stiffener is positioned on one side of the gusset plate, the brace sheet, gusset plate, and joining end plate are integrated by mutual welding, increasing the bending rigidity of the joining member in the horizontal plane, thus suppressing eccentric bending of the lateral stiffener.

[0009] The brace sheet located on the side of the gusset plate where the connecting surface of the transverse stiffener does not come into contact may be extended on the gusset plate to a point where it intersects with the connecting surface of the transverse stiffener and welded to the gusset plate. This allows the rigidity of the joint member to be increased, thereby enhancing the ability to suppress eccentric bending of the transverse stiffener.

[0010] The brace sheet located on the side of the gusset plate that contacts the joint surface of the transverse stiffener may be positioned on the gusset plate spaced apart from the end face of the joint surface of the transverse stiffener. This eliminates the need to form a notch in the brace sheet to avoid interference with the joint surface.

[0011] The brace sheet may be located on the vertically central side of the steel beam and on the vertically central side of the lateral stiffener. This allows the tensile force of the horizontal brace fixed to the brace sheet to be received at the vertically central sides of the steel beam and the lateral stiffener, respectively, and also makes it easier to avoid the horizontal brace interfering with the ceiling structure on the floor below.

[0012] Multiple through holes may be formed in the upper flange of the steel beam along the extension of the gusset plate, and the column member may be fixed onto the upper flange by fastening members passed through the through holes. This allows the column member to be fixed by the fastening members on the center of the gusset plate, which serves as the module center of the building. [Effects of the Invention]

[0013] With this invention, it is no longer necessary to use high-strength bolts to join the gusset plate to the steel beam as in the conventional method, and friction surface treatment and specialized tools are unnecessary, making it easier to provide residential buildings at a reasonable price. Furthermore, although the lateral stiffener is positioned on one side of the gusset plate, the gusset plate, brace sheet, and joining end plate are integrated by mutual welding, which increases the bending rigidity of the joining members in the horizontal plane, thus suppressing eccentric bending of the lateral stiffener. [Brief explanation of the drawing]

[0014] [Figure 1] This is a perspective view showing the beam connection points of the steel frame building structure according to the embodiment. [Figure 2] Figure 1 is a perspective view showing connecting members and lateral stiffeners in a steel-framed building structure. [Figure 3] Figure 1 is a cross-sectional view of the steel frame building structure taken along the line A-A. [Figure 4] Figure (A) is a plan view of the steel-framed building structure in Figure 1, and Figure (B) is a front view of the steel-framed building structure in Figure 1. [Figure 5] This is an explanatory diagram showing a beam connection point in a steel-framed building structure different from that of the embodiment. [Modes for carrying out the invention]

[0015] The embodiments of this invention will now be described based on the attached drawings. As shown in Figures 1 and 2, the steel frame building structure 8 of the embodiment has a structure in which the end of a lateral stiffener 2 is joined to a beam-side end plate 11 located on the side of an H-shaped steel beam 1 via a connecting member 3.

[0016] The beam-side end plate 11 is made of a square steel plate, is positioned across the upper flange 1H and the lower flange 1L of the H-shaped steel beam 1, and is fixed to these upper and lower flanges 1H and 1L by welding. A plurality of insertion holes through which bolts in the bolt-nut 41 (fastening member) are inserted are formed in the beam-side end plate 11. Further, a reinforcing plate 12 is provided on the back surface side of the beam-side end plate 11 in a vertical arrangement. This reinforcing plate 12 is fixed to the back surface of the beam-side end plate 11 and the web 1W of the H-shaped steel beam 1 by welding.

[0017] The lateral bracing member 2 has opposing surfaces 2a, 2a positioned vertically and a connecting surface 2b arranged vertically connecting these opposing surfaces 2a, 2a. In this embodiment, a lipped channel steel is used as the lateral bracing member 2. Of course, not limited to the lipped channel steel, a channel steel or the like can be used as the lateral bracing member 2.

[0018] The joining member 3 is formed by welding and fixing a joining end plate 31, a gusset plate 32, and a pair of brace sheets 33 to each other.

[0019] As shown in FIG. 3, the joining end plate 31 is, for example, made of a square steel plate having substantially the same width as the beam-side end plate 11 and a lower height. A plurality of insertion holes through which bolts in the bolt-nut 41 are inserted are formed in this joining end plate 31. The joining end plate 31 is fastened and fixed to the beam-side end plate 11 by the bolt-nut 41. In a structure where the beam-side end plate 11 is not provided, the joining end plate 31 may be directly fastened and fixed to the web 1W of the H-shaped steel beam 1.

[0020] The gusset plate 32 is made of a substantially trapezoidal steel plate arranged vertically, and the end of the gusset plate 32 is abutted against the front surface of the joining end plate 31 and fixed to the joining end plate 31 by welding. Further, the connecting surface 2b of the lateral bracing member 2 is fixed to one side of the gusset plate 32 by welding.

[0021] Each brace sheet 33 consists of a steel plate horizontally positioned on each side of the gusset plate 32 and is welded and fixed to the joining end plate 31 and the gusset plate 32.

[0022] As shown in Figures 4(A) and 4(B), the brace sheet 33 located on the side of the gusset plate 32 that does not come into contact with the joint surface 2b of the transverse stiffener 2 extends to the point where it intersects (overlaps) with the joint surface 2b of the transverse stiffener 2 on the gusset plate 32 and is welded to the gusset plate 32. The width of this intersection (overlap) is, for example, 30 mm or more. On the other hand, the brace sheet 33 located on the side of the gusset plate 32 that comes into contact with the joint surface 2b of the transverse stiffener 2 is spaced apart from the end face of the joint surface 2b of the transverse stiffener 2 on the gusset plate 32. This space is, for example, about 10 mm.

[0023] Furthermore, each brace sheet 33 is located on the vertically central side of the H-shaped steel beam 1 and also on the vertically central side of the lateral stiffener 2. In addition, a portion of the end fixing plate of the horizontal brace 5, which is fixed to the brace sheet 33 on the side of the gusset plate 32 where the lateral stiffener 2 is joined, is located between the upper and lower lips on the end side of the lateral stiffener 2 in a plan view.

[0024] Furthermore, in this steel frame building structure 8, two through holes are formed in the upper flange 1H of the H-shaped steel beam 1 along the extension of the gusset plate 32, and the column base 61 of the column member 6 is fixed onto the upper flange 1H by bolts and nuts 42 (column fastening members) passed through the above through holes. The column member 6 supports a solar power generation panel (not shown).

[0025] With the above configuration, the connecting end plate 31 is fastened and fixed to the beam-side end plate 11 by bolts and nuts 41, eliminating the need for a structure that connects the gusset plate 32 to the H-shaped steel beam 1 using high-strength bolts. This eliminates the need for friction surface treatment and specialized tools required when using high-strength bolts, making it easier to provide residential buildings at a reasonable price. Furthermore, although the lateral stiffener 2 is positioned on one side of the gusset plate 32, the brace sheet 33, gusset plate 32, and connecting end plate 31 are integrated by mutual welding, increasing the bending rigidity of the gusset plate 32 in the horizontal plane, thus suppressing eccentric bending of the lateral stiffener 2. In other words, because the gusset plate 32 is reinforced by the brace sheet 33, the strength of the gusset plate 32 in the weak axis direction (horizontal direction) is improved, and the degree of fixation of the end of the lateral stiffener 2 is increased, shortening the buckling length of the lateral stiffener 2 and improving the compressive strength of the lateral stiffener 2 (ensuring strength against eccentric compression in the weak axis direction).

[0026] When the brace sheet 33, which is located on the side of the lateral stiffener 2 that does not come into contact with the connecting surface 2b, is extended on the gusset plate 32 to the point where it intersects with the connecting surface 2b of the lateral stiffener 2 and welded to the gusset plate 32, the rigidity of the joint member 3 can be further increased, thereby enhancing the ability to suppress eccentric bending of the lateral stiffener 2.

[0027] If the brace sheet 33, which is located on the side of the surface that contacts the connecting surface 2b of the lateral stiffener 2, is positioned on the gusset plate 32 at a distance from the end face of the connecting surface 2b of the lateral stiffener 2, then the effort required to form a notch in the brace sheet 33 to avoid interference with the connecting surface 2b can be eliminated.

[0028] When the brace sheet 33 is positioned on the vertically central side of the web 1W of the H-shaped steel beam 1 and also on the vertically central side of the lateral stiffener 2, the tensile force of the horizontal brace 5 fixed to the brace sheet 33 can be received at the vertically central side of the connecting surface 2b of the web 1W and the lateral stiffener 2, and it becomes easier to avoid the horizontal brace 5 interfering with the ceiling structure on the floor below.

[0029] Multiple through holes are formed in the upper flange 1H of the H-shaped steel beam 1 along the extension of the gusset plate 32. When the column member 6 is fixed onto the upper flange 1H by bolts and nuts 42 passed through these through holes, the column member 6 can be fixed by the bolts and nuts 42 on the center of the gusset plate 32, which serves as the module center of the building.

[0030] Although embodiments of this invention have been described above with reference to the drawings, this invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as this invention, or within the scope of equivalents. [Explanation of Symbols]

[0031] 1:H-shaped steel beam 1H: Upper flange 1L: Lower flange 1W: Web 2: Lateral stiffeners 2a: Opposite surface part 2b: Connecting surface 3: Joining member 5: Horizontal brace 6:Column member 8: Steel frame building structure 9: Steel frame building structure 11: Beam-side end plate 12: Reinforcement plate 31: Joint end plate 32: Gusset Plate 33: Brace Sheet 41: Bolts and nuts (fastening components) 42: Bolts and nuts (column fastening components) 61: Column base

Claims

1. A steel frame building structure in which the end of a transverse stiffener having opposing surfaces located vertically and a vertically arranged connecting surface connecting the opposing surfaces is joined to the web of the steel beam or to a beam-side end plate fixed to the upper and lower flanges of the steel beam via a connecting member, The above-mentioned joining member is A connecting end plate fastened and secured to the web or beam-side end plate by a fastening member, A gusset plate is provided, in which the connecting surface portion of the above-mentioned lateral stiffener is welded and fixed to one side, and the end of the gusset plate is abutted against the surface of the above-mentioned joining end plate and welded and fixed to the said joining end plate, A brace sheet is welded and fixed horizontally to the above-mentioned joint end plate and gusset plate, A steel-frame building structure characterized by having the following features.

2. The steel frame building structure according to claim 1, wherein the brace sheet located on the side of the gusset plate where the connecting surface portion of the lateral stiffener does not come into contact with the brace sheet is extended on the gusset plate to a point where it intersects with the connecting surface portion of the lateral stiffener and is welded and fixed to the gusset plate.

3. The steel frame building structure according to claim 1, characterized in that the brace sheet located on the side of the gusset plate that contacts the joint surface portion of the transverse stiffener is positioned on the gusset plate at a distance from the end surface of the joint surface portion of the transverse stiffener.

4. The steel frame building structure according to claim 1, characterized in that the brace sheet is located on the vertically central side of the steel beam and on the vertically central side of the lateral stiffener.

5. A steel frame building structure according to claim 1, characterized in that a plurality of insertion holes are formed in the upper flange of the steel beam on the extension of the gusset plate, and a column member is fixed onto the upper flange by fastening members passed through the insertion holes.

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