Steel frame building structure

Abstract

The present invention provides a steel-framed building structure in which wall panels resist seismic horizontal forces, and even if a vertical pull-out force is generated in the flange of an H-shaped steel beam via the bolts fixing the wall panels, deformation that causes the flange to curl is suppressed. [Solution] In the steel frame building structure 9, an upper column 3H is fixed to the outdoor half side of the upper flange 2H of an H-shaped steel beam 2, and an upper wall panel 4H is installed at the lateral position of the upper column 3H. The lower horizontal frame end 4a at the corner of this upper wall panel 4H is fixed to the upper flange 2H by a fastening member 51. The upper horizontal reinforcing plate portion 61 of the steel box-shaped member 6 is fastened and fixed to the upper column 3H by the fastening member 51, sandwiching the upper flange 2H, and the lower horizontal reinforcing plate portion 62 is fastened and fixed to the lower column 3L by the fastening member 52, sandwiching the lower flange 2L.

Description

Technical Field

[0001] This invention relates to a steel building structure in which columns and wall panels are fixed to the flanges of a shaped steel beam by fastening members.

Background Art

[0002] As shown in FIG. 16(A), there is known a steel building structure 9 in which columns 92 and shear wall panels 93 are fixed to the upper and lower flanges 91a, 91b of an H-shaped steel beam 91 with bolts 94. In this steel building structure 9, it is conceivable to weld and fix a vertical plate 95 to the upper and lower flanges 91a, 91b.

[0003] Further, Patent Document 1 discloses a shaped steel coupling fitting in which one beam and the other beam are constituted by shaped steel, and the end portion of the other beam is vertically abutted and joined to the side portion of the one beam. Patent Document 2 discloses a reinforcing structure for a beam. This reinforcing structure is composed of an H-shaped steel, a horizontal plate, and a vertical plate.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the above steel building structure 9, when the shear wall panel 93 resists the seismic horizontal force and a vertical pulling force is generated on the upper flange 91a of the H-shaped steel beam 91 through the bolts 94 fixing the shear wall panel 93, as shown in FIG. 16(B), even if the vertical plate 95 is welded and fixed to the upper and lower flanges 91a, 91b, the upper flange 91a may be deformed so as to warp. The structures disclosed in Patent Documents 1 and 2 are not intended to suppress the above deformation.

[0006] In view of the above circumstances, this invention aims to provide a steel-framed building structure in which wall panels resist seismic horizontal forces, and even if a vertical pull-out force is generated in the flange of an H-shaped steel beam via the bolts fixing the wall panels, deformation such as curling of the flange can be suppressed. [Means for solving the problem]

[0007] In order to solve the above problems, the steel frame building structure of this invention is a steel frame building structure in which an upper column is fixed on the upper flange of a shaped steel beam, an upper wall panel is installed at the lateral position of the upper column, and the lower lateral frame end at the corner position of the upper wall panel is fixed to the upper flange by a fastening member. An upper horizontal reinforcing plate portion that faces the lower surface of the upper flange on the lower side of the upper column and has an insertion hole through which a fastening member for fixing the upper column is inserted, A lower horizontal reinforcing plate portion facing the upper surface of the lower flange of the steel beam located below the upper column, having an insertion hole through which a fastening member for fixing the lower column is inserted, A first vertical plate that joins one end of the upper horizontal reinforcing plate section and one end of the lower horizontal reinforcing plate section, A second vertical plate that joins the other end of the upper horizontal reinforcing plate and the other end of the lower horizontal reinforcing plate, The upper horizontal reinforcing plate section, the lower horizontal reinforcing plate section, the first vertical plate, and the second vertical plate are welded and fixed to each other on all four sides, and the web facing plate faces the web of the steel beam, It is equipped with a box-shaped member having, The box-shaped member is characterized in that the upper horizontal reinforcing plate portion is fastened and fixed to the upper column by the fastening member, sandwiching the upper flange, and the lower horizontal reinforcing plate portion is fastened and fixed to the lower column by the fastening member, sandwiching the lower flange.

[0008] With the above configuration, the upper horizontal reinforcing plate portion and the lower horizontal reinforcing plate portion of the box-shaped member are fastened and fixed to the column by the fastening member, sandwiching the flange of the steel beam. As a result, curling deformation of the upper flange on the upper column side is suppressed. Therefore, even if a vertical pull-out force is generated on the upper flange of the steel beam during an earthquake via the bolts fixing the horizontal wall panel on the upper column side, curling deformation of the upper flange can be suppressed. Furthermore, by making the steel beam thinner and lighter than before while suppressing the above deformation, it is also possible to expect a reduction in seismic input. In addition, since the box-shaped member, which has been manufactured in advance, can be fitted between the upper and lower flanges of the steel beam and fastened and fixed with the fastening member, there is an advantage in improving the workability of reinforcement.

[0009] The box-shaped member has an upper extension that overlaps at least the lower horizontal frame end of the upper wall panel, and the upper extension and the lower horizontal frame end of the upper wall panel may be fastened and fixed together, sandwiching the upper flange, by fastening members passed through through holes formed in the upper horizontal reinforcing plate portion that constitutes the upper extension. This allows the upper extension to directly suppress deformation of the upper flange that occurs when the bolts fixing the wall panel in the lateral position on the upper column side are fastened.

[0010] In the steel frame building structure having the upper extension described above, the box-shaped member has the upper extension on the side of the upper load-bearing wall panel having the diagonal member among the upper wall panels, and the box-shaped member may have an asymmetrical structure. This makes it possible to reduce the amount of material used to make up the box-shaped member, thereby reducing weight and cost.

[0011] The box-shaped member may have an asymmetrical structure, having an upper extension while lacking a lower extension relative to the upper horizontal frame end of the lower wall panel located next to the lower column. This allows for a reduction in the amount of material used to construct the box-shaped member, thereby reducing weight and cost.

[0012] In the steel frame building structure having the upper extension described above, the lower column is fixed to the lower flange of the shaped steel beam, and a lower wall panel is installed at the lateral position of the lower column, and the upper lateral frame end at the corner of this lower wall panel is fixed to the lower flange by a fastening member. The box-shaped member has a lower extension that overlaps the upper horizontal frame end of the lower wall panel, and the lower extension and the upper horizontal frame end of the lower wall panel may be fastened and fixed together, sandwiching the lower flange, by fastening members passed through through holes formed in the lower horizontal reinforcing plate portion that constitutes the lower extension. This allows the strength of the steel beam on the lower wall panel side to be improved by the lower extension.

[0013] In the steel frame building structure having the upper extension described above, the box-shaped member may have a vertically symmetrical structure, such that the upper extension that overlaps the lower horizontal frame end of the upper wall panel and the lower extension that overlaps the upper horizontal frame end of the lower wall panel have the same structure.

[0014] Furthermore, the steel frame building structure of this invention is a steel frame building structure in which an upper column is fixed on the upper flange of a shaped steel beam, an upper wall panel is installed at a lateral position of the upper column, and the lateral frame end at the corner position of the upper wall panel is fixed to the upper flange by a fastening member. An upper horizontal reinforcing plate portion is welded to the upper flange on the lower side of the upper column, facing the lower surface of the upper flange, and is also welded to the web of the shaped steel beam, and has an insertion hole through which a fastening member for fixing the upper column is inserted, A lower horizontal reinforcing plate portion is welded to the lower flange, facing the upper surface of the lower flange, and is welded to the lower flange, and is also welded to the web of the steel beam, and has an insertion hole through which a fastening member for fixing the lower column is inserted. A first vertical plate is welded and fixed to one end of the upper horizontal reinforcing plate section and one end of the lower horizontal reinforcing plate section, and is also welded and fixed to the web of the steel beam. A second vertical plate is welded and fixed to the other end of the upper horizontal reinforcing plate and the other end of the lower horizontal reinforcing plate, and is also welded and fixed to the web of the steel beam. It is characterized by having a frame-shaped welded reinforcement portion made of [material].

[0015] With the above configuration, the upper horizontal reinforcing plate portion and the lower horizontal reinforcing plate portion of the frame-shaped welded reinforcement are fastened and fixed to the column by the fastening member, sandwiching the flange of the shaped steel beam. As a result, curling deformation of the upper flange on the upper column side is suppressed. Therefore, even if a vertical pull-out force is generated on the upper flange of the shaped steel beam during an earthquake via the bolts fixing the lateral wall panel on the upper column side, it is possible to suppress curling deformation of the upper flange.

[0016] In the steel frame building structure having the frame-shaped welded reinforcement described above, the upper ends of the first vertical plate and the second vertical plate may be welded and fixed to the upper flange by groove welding at the welding points with the ends of the upper horizontal reinforcement plate, and the lower ends of the first vertical plate and the second vertical plate may be welded and fixed to the lower flange by groove welding at the welding points with the ends of the lower horizontal reinforcement plate. This allows the frame-shaped welded reinforcement to be more firmly fixed to the shaped steel beam, and the curling deformation of the upper flange can be suppressed more effectively.

[0017] In the steel frame building structure having the frame-shaped welded reinforcement portion described above, the upper horizontal reinforcing plate portion and the lower horizontal reinforcing plate portion have recesses extending in the direction of extension of the flange at a position away from the edge of each flange, and may be welded and fixed to each flange at the location of the recess. This allows the frame-shaped welded reinforcement portion to be fixed more firmly to the shaped steel beam, and the curling deformation of the upper flange can be suppressed more effectively.

[0018] In the steel building structure having the above-mentioned frame-shaped welded reinforcement part, the back edges of each of the above upper horizontal reinforcement plate part and the above lower horizontal reinforcement plate part may be fixed by groove welding at the intersection of the above web of the above H-shaped steel beam and each of the above flanges. According to this, the above frame-shaped welded reinforcement part can be fixed more firmly to the above H-shaped steel beam, and the warping deformation of the above upper flange can be more surely suppressed.

[0019] In the steel building structure having the above-mentioned frame-shaped welded reinforcement part, the back edges of each of the above upper horizontal reinforcement plate part and the above lower horizontal reinforcement plate part are bent and protruded toward the above web side of the above H-shaped steel beam, and the end part of this protruding part and the above web may be fixed by welding. According to this, the above frame-shaped welded reinforcement part can be fixed more firmly to the above H-shaped steel beam, and the warping deformation of the above upper flange can be more surely suppressed.

[0020] In the steel building structure having the above-mentioned frame-shaped welded reinforcement part, at least the above upper horizontal reinforcement plate part has an upper extension part that overlaps the lower horizontal frame end part of the above upper wall panel, and the upper extension part and the lower horizontal frame end part of the above upper wall panel are fastened and fixed with the above upper flange sandwiched therebetween by a fastening member passed through an insertion hole formed in the above upper extension part. At least the above upper extension part may also be welded and fixed to the above H-shaped steel beam. According to this, the warping deformation of the above upper flange through the bolt that fixes the wall panel at the horizontal position on the above upper column side can be directly suppressed by the above upper extension part.

[0021] In the steel building structure having the above upper extension part in the above frame-shaped welded reinforcement part, the above upper extension part of the above upper horizontal reinforcement plate part is located on the side of the above upper wall panel having a diagonal member, so that the above frame-shaped welded reinforcement part may be asymmetric left and right. According to this, the materials constituting the above box-shaped member can be reduced, and weight reduction and cost reduction can be achieved.

[0022] In a steel building structure having the upper extension portion on the above-mentioned frame-shaped welded reinforcement portion, the upper extension portion of the upper horizontal reinforcement plate portion is located overlapping the lower horizontal frame end portion of the upper wall panel located beside the upper column, while the lower horizontal reinforcement plate portion does not have a lower extension portion for the upper horizontal frame end portion of the lower wall panel located beside the lower column, so that the frame-shaped welded reinforcement portion may be vertically asymmetric. According to this, it is possible to reduce the materials constituting the box-shaped member and achieve weight reduction and cost reduction.

[0023] In a steel building structure having the upper extension portion on the above-mentioned frame-shaped welded reinforcement portion, the lower column is fixed to the lower flange of the above-mentioned I-beam, and a lower wall panel is installed at the horizontal position beside the lower column. The upper horizontal frame end portion at the corner position of this lower wall panel is fixed to the above-mentioned lower flange by a fastening member. The frame-shaped welded reinforcement portion has a lower extension portion overlapping the upper horizontal frame end portion of the lower wall panel. The lower extension portion and the upper horizontal frame end portion of the lower wall panel may be fastened and fixed with the lower flange sandwiched therebetween by a fastening member passed through an insertion hole formed in the lower horizontal reinforcement plate portion constituting the lower extension portion. According to this, also on the side of the lower wall panel, the strength of the I-beam can be improved by the lower extension portion.

[0024] In a steel building structure having the upper extension portion on the above-mentioned frame-shaped welded reinforcement portion, the frame-shaped welded reinforcement portion may have a vertically symmetric structure in that the upper extension portion overlapping the lower horizontal frame end portion of the upper wall panel and the lower extension portion overlapping the upper horizontal frame end portion of the lower wall panel have the same structure. According to this, it is possible to reduce the materials constituting the box-shaped member and achieve weight reduction and cost reduction.

[0025] In a steel frame building structure having the upper extension portion of the frame-shaped welded reinforcement portion, the upper and lower ends of the first vertical plate and the second vertical plate may also be welded and fixed to the upper extension portion of the upper horizontal reinforcement plate portion. This allows the upper extension portion of the frame-shaped welded reinforcement portion to be fixed more firmly to the shaped steel beam, thereby more effectively suppressing the curling deformation of the upper flange.

[0026] In a steel frame building structure having the upper extension portion of the frame-shaped welded reinforcement portion, the upper extension portion of the upper horizontal reinforcing plate portion has a recess extending in the direction of extension of the upper flange at a position away from the edge of the upper flange, and may be welded and fixed to the upper flange at the location of the recess. This allows the upper extension portion of the frame-shaped welded reinforcement portion to be fixed more firmly to the shaped steel beam, thereby more effectively suppressing the curling deformation of the upper flange.

[0027] The inner edge of the upper extension of the upper horizontal reinforcing plate portion described above may be fixed to the intersection of the web and the upper flange of the steel beam by groove welding. This allows the upper extension of the frame-shaped welded reinforcing portion to be fixed more firmly to the steel beam, thereby more effectively suppressing the curling deformation of the upper flange.

[0028] The inner edge of the upper extension of the upper horizontal reinforcing plate portion described above curves and protrudes toward the web side of the steel beam, and the end of this protruding portion and the web may be fixed by welding. This allows the upper extension of the frame-shaped welded reinforcing portion to be fixed more firmly to the steel beam, thereby more effectively suppressing the curling deformation of the upper flange. [Effects of the Invention]

[0029] With this invention, even if the wall panel resists the horizontal force of an earthquake, and a vertical pull-out force is generated in the flange of the H-shaped steel beam via the bolts that fix the wall panel, it is possible to suppress deformation that would cause the flange to curl. [Brief explanation of the drawing]

[0030] [Figure 1] This is a perspective view diagram illustrating the steel frame building structure of the embodiment. [Figure 2] Figure (A) is a perspective view showing a portion of the H-shaped steel beam and box-shaped member of the steel frame building structure in Figure 1, and Figure (B) is a perspective view of the box-shaped member. [Figure 3] This is an explanatory diagram showing a front view of the steel frame building structure of the embodiment. [Figure 4] Figure (A) is an explanatory diagram showing the suppression of flange curling deformation in the steel frame building structure of Figure 1, and Figure (B) is an explanatory diagram showing a further configuration in which the flange edge and the box-shaped member are welded together. [Figure 5] This figure shows a modified example of the embodiment, and is a perspective view illustrating a box-shaped member with a part and extension of an H-shaped steel beam. [Figure 6] This figure shows a modified example of the embodiment, and is a perspective view illustrating a box-shaped member with a part and extension of an H-shaped steel beam. [Figure 7] This figure shows a modified example of the embodiment, and is a perspective view illustrating a box-shaped member with a part and extension of an H-shaped steel beam. [Figure 8] This is an explanatory diagram showing a front view of the steel frame building structure of Embodiment 2. [Figure 9] This figure shows Embodiment 2, and is a perspective view illustrating a part of an H-shaped steel beam and a frame-shaped welded reinforcement section. [Figure 10] Figures (A) and (B) are explanatory diagrams showing the welding configurations of the H-shaped steel beam and the frame-shaped welded reinforcement section shown in Figure 9, respectively. [Figure 11] Figure (A) is a diagram showing a modified example of Embodiment 2, and is a perspective view illustrating a part of the H-shaped steel beam and the frame-shaped welded reinforcement section. Figure (B) is a diagram illustrating the welding configuration between the H-shaped steel beam and the frame-shaped welded reinforcement section. [Figure 12] Figure (A) is a diagram showing a modified example of Embodiment 2, and is a perspective view illustrating a part of the H-shaped steel beam and the frame-shaped welded reinforcement section. Figure (B) is a diagram illustrating the welding configuration between the H-shaped steel beam and the frame-shaped welded reinforcement section. [Figure 13] Figure (A) is a diagram showing a modified example of Embodiment 2, and is a perspective view illustrating a part of the H-shaped steel beam and a frame-shaped welded reinforcement with an extension, while Figure (B) is a diagram illustrating the welding configuration of the H-shaped steel beam and the frame-shaped welded reinforcement with an extension. [Figure 14] This figure shows a modified example of Embodiment 2, and is a perspective view illustrating a frame-shaped welded reinforcement section with an extension and a portion of an H-shaped steel beam. [Figure 15] This figure shows a modified example of Embodiment 2, and is a perspective view illustrating a frame-shaped welded reinforcement section with an extension and a portion of an H-shaped steel beam. [Figure 16] Figure (A) is a diagram illustrating the technical background, and is a perspective view explanatory diagram showing a steel frame building structure having a part of an H-shaped steel beam and vertical plates. Figure (B) is an explanatory diagram showing the curling deformation of the flange in the steel frame building structure shown in Figure (A). [Modes for carrying out the invention]

[0031] (Embodiment 1) Embodiments of this invention will now be described based on the attached drawings. As shown in Figure 1, the steel frame building structure 1 of the embodiment has an upper column 3H fixed to the outdoor half side of the upper flange 2H of an H-shaped steel beam 2, and an upper wall panel 4H installed at the lateral position of the upper column 3H, and the lower horizontal frame end 4a at the corner position of the upper wall panel 4H is fixed to the upper flange 2H by a fastening member 51, and is equipped with a box-shaped member 6 made of steel.

[0032] As shown in Figures 2(A) and 2(B), the box-shaped member 6 comprises an upper horizontal reinforcing plate portion 61, a lower horizontal reinforcing plate portion 62, a first vertical plate 63, a second vertical plate 64, and a web-facing plate 65.

[0033] The upper horizontal reinforcing plate portion 61 faces the lower surface of the upper flange 2H on the lower side of the upper column 3H and has through holes 6a through which fastening members 52 such as bolts that fix the upper column 3H are inserted. The lower horizontal reinforcing plate portion 62 faces the upper surface of the lower flange 2L of the H-shaped steel beam 2 on the lower side of the upper column 3H and has through holes 6a through which fastening members 52 such as bolts that fix the lower column 3L are inserted.

[0034] The first vertical plate 63 is joined to one end of the upper horizontal reinforcing plate portion 61 and one end of the lower horizontal reinforcing plate portion 62 by fillet welding, and the second vertical plate 64 is joined to the other end of the upper horizontal reinforcing plate portion 61 and the other end of the lower horizontal reinforcing plate portion 62 by fillet welding.

[0035] The web-facing plate 65 is the part that faces the web 2W of the H-shaped steel beam 2, and the four sides of the web-facing plate 65 are fixed to the upper horizontal reinforcing plate portion 61, the lower horizontal reinforcing plate portion 62, the first vertical plate 63, and the second vertical plate 64 by fillet welding.

[0036] The box-shaped member 6 is fitted between the upper flange 2H and the lower flange 2L of the H-shaped steel beam 2 at the construction site. The upper horizontal reinforcing plate portion 61 is fastened and fixed to the upper column 3H by fastening members 52, sandwiching the upper flange 2H, while the lower horizontal reinforcing plate portion 62 is fastened and fixed to the lower column 3L by fastening members 52, sandwiching the lower flange 2L.

[0037] With the above configuration, as shown in Figure 3, the upper horizontal reinforcing plate portion 61 and the lower horizontal reinforcing plate portion 62 of the box-shaped member 6 are fastened and fixed to the columns 3H and 3L by fastening members 52, sandwiching the flanges 2H and 2L of the H-shaped steel beam 2. As a result, the curling deformation of the upper flange 2H at the upper column 3H is suppressed. Therefore, even if a vertical pull-out force is generated on the upper flange 2H of the H-shaped steel beam 2 via the fastening members 51 that fix the wall panel 4H at the lateral position of the upper column 3H during an earthquake, it is possible to suppress the curling deformation of the upper flange 2H. Furthermore, by making the H-shaped steel beam 2 thinner and lighter than before while suppressing the above deformation, it is also possible to expect the effect of reducing seismic input. In addition, since the box-shaped member 6, which has been manufactured in advance, can be fitted between the upper and lower flanges 2H and 2L of the H-shaped steel beam 2 at the construction site and fastened and fixed with fastening members 52, there is an advantage in improving the workability of reinforcement.

[0038] In the structure shown in Figure 4(A), a gap may form between the edges of the upper and lower flanges 2H and 2L and the front edge of the box-shaped member 6 due to tensile force during an earthquake. This may reduce the load-bearing capacity of the upper and lower flanges 2H and 2L. However, as shown in Figure 4(B), the edges of the upper and lower flanges 2H and 2L and the front edge of the box-shaped member 6 are welded together, thus preventing the reduction in the load-bearing capacity of the upper and lower flanges 2H and 2L. When the H-shaped steel beam 2 is manufactured in the factory, if the edges of the upper and lower flanges 2H and 2L and the front edge of the box-shaped member 6 are welded together, the H-shaped steel beam 2 with the box-shaped member 6 attached can be transported to the site. Furthermore, the thickness of the lower horizontal reinforcing plate 62 may be made thicker than the thickness of the upper horizontal reinforcing plate 61.

[0039] Figure 5 shows a modified box-shaped member 6A of the box-shaped member 6. This box-shaped member 6A has an upper extension 600 that overlaps the lower horizontal frame end 4a of the upper wall panel 4H. The upper extension 600 is formed by extending the upper horizontal reinforcing plate portion 61, and the upper extension 600 and the lower horizontal frame end 4a of the upper wall panel 4H are fastened and fixed together with the upper flange 2H in between by a fastening member 51 passed through the insertion hole 6a. In this example, the web facing plate 65 is also extended to form the upper extension 600.

[0040] According to this, the deformation of the upper flange 2H that causes it to curl up via the fastening member 51 that fixes the upper wall panel 4H in the lateral position of the upper column 3H can be directly suppressed by the upper extension 600.

[0041] The box-shaped member 6A shown in the figure has a lower extension 600 that overlaps the upper horizontal frame end 4a of the lower wall panel 4L (4LB). The lower extension 600 and the upper horizontal frame end 4a of the lower wall panel 4L (4LB) are fastened and fixed together with the lower flange 2L in between by fastening members 52 passed through through holes 6a formed in the lower horizontal reinforcing plate portion 62 that constitutes the lower extension 600. The box-shaped member 6A has a vertically symmetrical structure because the upper extension 600 that overlaps the lower horizontal frame end 4a of the upper wall panel 4H and the lower extension 600 that overlaps the upper horizontal frame end 4a of the lower wall panel 4L have the same structure and are extended accordingly. The above vertical symmetry is vertically symmetrical with respect to a horizontal plane that passes through the vertical center line of the web 2W and is perpendicular to the web 2W.

[0042] In the modified example shown in Figure 5, the box-shaped member 6A has an upper extension 600 not only on the upper shear wall panel 4HB side but also on the upper wall panel 4H side. However, by not providing it on the upper wall panel 4H side and only on the upper shear wall panel 4HB side, the box-shaped member 6A may have an asymmetrical structure. The above asymmetry is asymmetrical with respect to a vertical plane that passes vertically through the intermediate position between the first vertical plate 63 and the second vertical plate 64 and is perpendicular to the web 2W. Alternatively, the structure may be asymmetrical by providing the extension 600 only on the upper shear wall panel 4HB side and the lower shear wall panel 4LB side. The same applies to the configurations shown below.

[0043] Furthermore, although the box-shaped member 6A has an upper extension 600 not only on the upper load-bearing wall panel 4HB side but also on the lower wall panel 4L side, the box-shaped member 6A may have an asymmetrical structure vertically by omitting the extension on the lower wall panel 4L side and providing it only on the upper load-bearing wall panel 4HB side, or on both the upper load-bearing wall panel 4HB side and the upper wall panel 4H side. Note that the above vertical asymmetry is vertically asymmetry with respect to the horizontal plane that passes through the vertical center line of the web 2W and is perpendicular to the web 2W.

[0044] Thus, if the box-shaped member 6A has an asymmetrical structure from left to right or from top to bottom, the amount of material used to construct the box-shaped member 6A can be reduced, thereby reducing weight and cost.

[0045] Figure 6 shows the box-shaped member 6B. The difference between this box-shaped member 6B and the box-shaped member 6A is that it has a vertical plate 600a at the end of the extension 600. The vertical plate 600a is welded and fixed to the extension side of the upper horizontal reinforcing plate 61, the extension side of the lower horizontal reinforcing plate 62, and the extension side of the web facing plate 65. This box-shaped member 6B is not limited to a vertically symmetrical structure as shown in the figure, but may also have a left-right asymmetrical structure or a vertically asymmetrical structure, similar to the box-shaped member 6A. This would reduce the amount of material used to construct the box-shaped member 6B, thereby reducing weight and cost.

[0046] Figure 7 shows the box-shaped member 6C. The difference between this box-shaped member 6C and the box-shaped member 6B is that each vertical plate 600a is divided vertically into two short vertical plates 600b, and the extended side of the web facing plate 65 is also divided vertically into two short facing plates 600c. The short vertical plates 600b and the short facing plates 600c are integrally formed by bending. This box-shaped member 6C is not limited to a vertically symmetrical structure as shown in the figure; like the box-shaped members 6A and B, it may also have a left-right asymmetrical structure or a vertically asymmetrical structure. This would reduce the amount of material used to construct the box-shaped member 6C, thereby reducing weight and cost.

[0047] (Embodiment 2) Other embodiments of this invention will be described below with reference to the attached drawings. As shown in Figure 8, the steel frame building structure 1 of the embodiment has an upper column 3H fixed to the outdoor half side of the upper flange 2H of the H-shaped steel beam 2, and an upper wall panel 4H installed at the lateral position of the upper column 3H, and the lower horizontal frame end 4a at the corner position of the upper wall panel 4H is fixed to the upper flange 2H by a fastening member 51, and is equipped with a frame-shaped welded reinforcement part 7 made of steel.

[0048] As shown in Figure 9, the frame-shaped welded reinforcement section 7 comprises an upper horizontal reinforcement plate section 61, a lower horizontal reinforcement plate section 62, a first vertical plate 63, and a second vertical plate 64.

[0049] The upper horizontal reinforcing plate portion 61 is located below the upper column 3H, facing the lower surface of the upper flange 2H, and is welded to the upper flange 2H. It is also welded to the web 2W of the H-shaped steel beam 2 and has an insertion hole 6a through which a fastening member 52 for fixing the upper column 3H is inserted.

[0050] The lower horizontal reinforcing plate portion 62 is fixed to the lower flange 2L of the H-shaped steel beam 2, and is located above the lower column 3L facing the upper surface of the lower flange 2L. It is welded and fixed to the lower flange 2L and is also welded and fixed to the web 2W of the H-shaped steel beam 2. It has an insertion hole 6a through which a fastening member 52 that fixes the lower column 3L is inserted.

[0051] As shown in Figure 10(A), the inner edge of the upper horizontal reinforcing plate 61 is welded with a grooved weld at the intersection of the upper flange 2H and the web 2W. Similarly, the inner edge of the lower horizontal reinforcing plate 62 is welded with a grooved weld at the intersection of the lower flange 2L and the web 2W.

[0052] As shown in Figure 10(B), the first vertical plate 63 is welded and fixed to the web 2W of the H-shaped steel beam 2 by fillet welding on both vertical sides, and the second vertical plate 64 is also welded and fixed to the web 2W of the H-shaped steel beam 2 by fillet welding on both vertical sides.

[0053] Furthermore, the first vertical plate 63 is welded to one end of the upper horizontal reinforcing plate portion 61 and one end of the lower horizontal reinforcing plate portion 62, but in this example, I-groove welding is performed on the outer corner where the ends intersect. Similarly, the second vertical plate 64 is welded to the other end of the upper horizontal reinforcing plate portion 61 and the other end of the lower horizontal reinforcing plate portion 62, but in this example, I-groove welding is performed on the outer corner where the ends intersect. These welds can be performed in the factory when manufacturing the H-shaped steel beam 2.

[0054] With the above configuration, the upper horizontal reinforcing plate portion 61 and the lower horizontal reinforcing plate portion 62 of the frame-shaped welded reinforcement section 7 are fastened and fixed to the columns 3H and 3L by fastening members 52, sandwiching the flanges 2H and 2L of the H-shaped steel beam 2. As a result, curling deformation of the upper flange 2H at the upper column 3H is suppressed. Therefore, even if a vertical pull-out force is generated on the upper flange 2H of the H-shaped steel beam 2 via the fastening members 51 that fix the wall panel 4H at the lateral position of the upper column 3H during an earthquake, curling deformation of the upper flange 2H can be suppressed. Furthermore, by making the H-shaped steel beam 2 thinner and lighter than before while suppressing the above deformation, it is also possible to expect the effect of reducing seismic input. In addition, the welding work of the frame-shaped welded reinforcement section 7 can be performed on the H-shaped steel beam 2 in the factory, which has the advantage of improving work efficiency.

[0055] Figure 11(A) shows a modified example of the frame-shaped welded reinforcement section 7. In this modified example, the upper horizontal reinforcement plate section 61 and the lower horizontal reinforcement plate section 62 have recesses 61b and 62b that extend in the direction of extension of the flanges 2H and 2L, located away from the edges of the flanges 2H and 2L, and are welded and fixed to the flanges 2H and 2L at the locations of the recesses 61b and 62b, respectively, as shown in Figure 11(B).

[0056] Figure 12(A) shows a modified example of the frame-shaped welded reinforcement section 7. In this modified example, the inner edges of the upper horizontal reinforcement plate section 61 and the lower horizontal reinforcement plate section 62 are curved and protrude toward the web 2W side of the H-shaped steel beam 2. The ends of these protruding sections 61c and 62c are then fixed to the web 2W by welding, as shown in Figure 12(B). In the illustrated example, the sections are welded to the flanges 2H and 2L at the recesses 61b and 62b, respectively, but this is not the only option.

[0057] Figure 13(A) shows the frame-shaped welded reinforcement section 7A with an extension. This frame-shaped welded reinforcement section 7A has an upper extension section 700 that overlaps the lower horizontal frame end 4a of the upper wall panel 4H. The upper extension section 700 is formed by extending the upper horizontal reinforcement plate section 61, and the upper extension section 700 and the lower horizontal frame end 4a of the upper wall panel 4H are fastened and fixed together with the upper flange 2H in between by fastening members 51 passed through the insertion holes 6a. In addition, the upper and lower ends of the first vertical plate 63 and the second vertical plate 64 are welded and fixed to the upper extension section 700 of the upper horizontal reinforcement plate section 61 and to the upper extension section 700 of the lower horizontal reinforcement plate section 62, as shown in Figure 13(B).

[0058] According to this, the deformation of the upper flange 2H that causes it to curl up via the fastening member 51 that fixes the upper wall panel 4H in the lateral position of the upper column 3H can be directly suppressed by the upper extension 700.

[0059] The frame-shaped welded reinforcement section 7A with an extension shown in the figure has a lower extension section 700 that overlaps with the upper horizontal frame end 4a of the lower wall panel 4L (4LB). The lower extension section 700 and the upper horizontal frame end 4a of the lower wall panel 4L (4LB) are fastened and fixed together with the lower flange 2L in between by fastening members 52 passed through through holes 6a formed in the lower horizontal reinforcement plate section 62 that constitutes the lower extension section 700. The frame-shaped welded reinforcement section 7A with an extension section has a vertically symmetrical structure because the upper extension section 700 that overlaps with the lower horizontal frame end 4a of the upper wall panel 4H and the lower extension section 700 that overlaps with the upper horizontal frame end 4a of the lower wall panel 4L have the same structure and are extended accordingly. The above vertical symmetry is vertically symmetrical with respect to a horizontal plane that passes through the vertical center line of the web 2W and is perpendicular to the web 2W.

[0060] Furthermore, the frame-shaped welded reinforcement section 7A with extensions has an upper extension 700 not only on the upper shear wall panel 4HB side but also on the upper wall panel 4H side. However, by not providing it on the upper wall panel 4H side and only on the upper shear wall panel 4HB side, the box-shaped member 6A may have an asymmetrical structure. The above asymmetry is asymmetrical with respect to a vertical plane that passes vertically through the intermediate position between the first vertical plate 63 and the second vertical plate 64 and is perpendicular to the web 2W. Note that the structure may also be asymmetrical by providing the extension 700 only on the upper shear wall panel 4HB side and the lower shear wall panel 4LB side. The same applies to the configuration shown below.

[0061] Furthermore, the frame-shaped welded reinforcement section 7A with extensions has an upper extension 700 not only on the upper shear wall panel 4HB side but also on the lower wall panel 4L side. However, by not providing it on the lower wall panel 4L side and only providing it on the upper shear wall panel 4HB side, or on both the upper wall panel 4HB and the upper wall panel 4H side, the box-shaped member 6A may have an asymmetrical structure vertically. Note that the above vertical asymmetry is vertically asymmetry with respect to the horizontal plane that passes through the vertical center line of the web 2W and is perpendicular to the web 2W.

[0062] Thus, if the frame-shaped welded reinforcement section 7A with extensions has an asymmetrical structure, either left-right or up-down, the amount of material used to construct the frame-shaped welded reinforcement section 7A can be reduced, thereby reducing weight and cost.

[0063] Figure 14 shows the frame-shaped welded reinforcement section 7B with an extension. This frame-shaped welded reinforcement section 7B with an extension uses the frame-shaped welded reinforcement section 7 according to the modified example shown in Figures 11(A) and 11(B). The extension section 700 also has an upper horizontal reinforcing plate section 61 and a lower horizontal reinforcing plate section 62, which have recesses 61b and 62b that extend in the direction of extension of the flanges 2H and 2L, located away from the edges of the flanges 2H and 2L. As shown in Figure 11(B), the recesses 61b and 62b are welded and fixed to the flanges 2H and 2L, respectively. This frame-shaped welded reinforcement section 7B with an extension is not limited to a vertically symmetrical structure as shown in the figure, but may also have a left-right asymmetrical structure or a vertically asymmetrical structure, similar to the frame-shaped welded reinforcement section 7A with an extension.

[0064] Figure 15 shows a frame-shaped welded reinforcement section 7C with an extension. This frame-shaped welded reinforcement section 7C uses the frame-shaped welded reinforcement section 7 according to the modified example shown in Figures 12(A) and 12(B). On the side of the extension section 700, the inner edges of the upper horizontal reinforcing plate section 61 and the lower horizontal reinforcing plate section 62 are curved and protrude toward the web 2W side of the H-shaped steel beam 2. The ends of these protruding sections 61c and 62c are then fixed to the web 2W by welding, as shown in Figure 12(B).

[0065] 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 equivalent scope. [Explanation of symbols]

[0066] 1: Steel frame building structure 2:H-shaped steel beam 2H: Upper flange 2L: Lower flange 2W: Web 3H: Upper pillar 3L: Lower pillar 4H: Upper wall panel 4HB: Upper load-bearing wall panel 4L: Lower wall panel 4LB: Lower load-bearing wall panel 4a: Horizontal frame end 6: Box-shaped member 6A: Box-shaped member 6B: Box-shaped member 6C: Box-shaped member 6a: Through hole 7: Frame-shaped welded reinforcement section 7A: Frame-shaped welded reinforcement section with extension 7B: Frame-shaped welded reinforcement with extension 7C: Frame-shaped welded reinforcement with extension 9: Steel frame building structure 51: Fastening member 52: Fastening member 61: Upper horizontal reinforcing plate section 61b: recess 61c: Overhang 62: Lower horizontal reinforcing plate section 62b: recess 62c: Overhang 63: First vertical board 64: Second vertical board 65: Web-based face-to-face meetings 600: Extension 600a: Vertical board 600b: Short vertical board 600c: Short facing board 700: Extension part

Claims

1. In a steel frame building structure, an upper column is fixed to the upper flange of a shaped steel beam, and an upper wall panel is installed at the lateral position of the upper column, and the lower lateral frame end at the corner of the upper wall panel is fixed to the upper flange by a fastening member, An upper horizontal reinforcing plate portion that faces the lower surface of the upper flange on the lower side of the upper column and has an insertion hole through which a fastening member for fixing the upper column is inserted, A lower horizontal reinforcing plate portion facing the upper surface of the lower flange of the steel beam located below the upper column, having an insertion hole through which a fastening member for fixing the lower column is inserted, A first vertical plate that joins one end of the upper horizontal reinforcing plate section and one end of the lower horizontal reinforcing plate section, A second vertical plate that joins the other end of the upper horizontal reinforcing plate and the other end of the lower horizontal reinforcing plate, The upper horizontal reinforcing plate section, the lower horizontal reinforcing plate section, the first vertical plate, and the second vertical plate are welded and fixed to each other on all four sides, and the web facing plate faces the web of the steel beam, It is equipped with a box-shaped member having, A steel frame building structure characterized in that the upper horizontal reinforcing plate portion of the box-shaped member is fastened and fixed to the upper column by the fastening member, sandwiching the upper flange, and the lower horizontal reinforcing plate portion is fastened and fixed to the lower column by the fastening member, sandwiching the lower flange.

2. The steel frame building structure according to claim 1, wherein the box-shaped member has an upper extension that overlaps at least the lower horizontal frame end of the upper wall panel, and the upper extension and the lower horizontal frame end of the upper wall panel are fastened and fixed together with the upper flange in between by fastening members passed through through holes formed in the upper horizontal reinforcing plate portion that constitutes the upper extension.

3. The steel frame building structure according to claim 2, wherein the box-shaped member has an upper extension on the side of the upper load-bearing wall panel having a diagonal member among the upper wall panels, and the box-shaped member has an asymmetrical structure.

4. The steel frame building structure according to claim 2, wherein the box-shaped member has an upper extension that overlaps with the lower horizontal frame end of the upper wall panel located next to the upper column, while it does not have a lower extension that is relative to the upper horizontal frame end of the lower wall panel located next to the lower column, thus having an asymmetrical structure.

5. In the steel frame building structure described in claim 2, the lower column is fixed to the lower flange of the shaped steel beam, and a lower wall panel is installed at the lateral position of the lower column, and the upper lateral frame end at the corner of the lower wall panel is fixed to the lower flange by a fastening member. The above-mentioned box-shaped member has a lower extension that overlaps the upper horizontal frame end of the lower wall panel, and the lower extension and the upper horizontal frame end of the lower wall panel are fastened and fixed together with the lower flange in between by fastening members passed through through holes formed in the lower horizontal reinforcing plate portion that constitutes the lower extension.

6. The steel frame building structure according to claim 5, wherein the box-shaped member has a vertically symmetrical structure, characterized in that the upper extension portion that overlaps the lower horizontal frame end of the upper wall panel and the lower extension portion that overlaps the upper horizontal frame end of the lower wall panel have the same structure and are extended accordingly.

7. In a steel frame building structure, an upper column is fixed to the upper flange of a shaped steel beam, and an upper wall panel is installed laterally to the upper column, and the lateral frame ends at the corners of the upper wall panel are fixed to the upper flange by fastening members, An upper horizontal reinforcing plate portion is welded to the upper flange on the lower side of the upper column, facing the lower surface of the upper flange, and is also welded to the web of the shaped steel beam, and has an insertion hole through which a fastening member for fixing the upper column is inserted, A lower horizontal reinforcing plate portion is welded to the lower flange, facing the upper surface of the lower flange, and is welded to the lower flange, and is also welded to the web of the steel beam, and has an insertion hole through which a fastening member for fixing the lower column is inserted. A first vertical plate is welded and fixed to one end of the upper horizontal reinforcing plate section and one end of the lower horizontal reinforcing plate section, and is also welded and fixed to the web of the steel beam. A second vertical plate is welded and fixed to the other end of the upper horizontal reinforcing plate and the other end of the lower horizontal reinforcing plate, and is also welded and fixed to the web of the steel beam. A steel-framed building structure characterized by having a frame-shaped welded reinforcement section made of the same material.

8. The steel frame building structure according to claim 7, characterized in that the upper ends of the first vertical plate and the second vertical plate are welded and fixed to the upper flange by groove welding at the welding points with the ends of the upper horizontal reinforcing plate, and the lower ends of the first vertical plate and the second vertical plate are welded and fixed to the lower flange by groove welding at the welding points with the ends of the lower horizontal reinforcing plate.

9. The steel frame building structure according to claim 7, wherein the upper horizontal reinforcing plate portion and the lower horizontal reinforcing plate portion have recesses extending in the direction of extension of the flange at a position away from the edge of the flange, and are welded and fixed to the flange at the location of the recess.

10. The steel frame building structure according to claim 7, characterized in that the inner edges of the upper horizontal reinforcing plate portion and the lower horizontal reinforcing plate portion are fixed to the intersection of the web of the shaped steel beam and the flanges by groove welding.

11. The steel frame building structure according to claim 7, characterized in that the inner edges of the upper horizontal reinforcing plate portion and the lower horizontal reinforcing plate portion each curve outwards toward the web side of the shaped steel beam, and the ends of these outward-facing portions and the web are fixed by welding.

12. In the steel frame building structure according to claim 7, at least the upper horizontal reinforcing plate portion has an upper extension portion that overlaps the lower horizontal frame end of the upper wall panel, and the upper extension portion and the lower horizontal frame end of the upper wall panel are fastened and fixed together with the upper flange in between by fastening members passed through through holes formed in the upper extension portion. A steel frame building structure characterized in that at least the upper extension portion is welded and fixed to the steel beam.

13. The steel frame building structure according to claim 7, wherein the upper extension of the upper horizontal reinforcing plate portion is located on the side of the upper load-bearing wall panel having a diagonal member among the upper wall panels, and the frame-shaped welded reinforcing portion is asymmetrical.

14. The steel frame building structure according to claim 7, wherein the upper extension of the upper horizontal reinforcing plate portion is positioned to overlap with the lower horizontal frame end of the upper wall panel located next to the upper column, while the lower horizontal reinforcing plate portion does not have a lower extension to the upper horizontal frame end of the lower wall panel located next to the lower column, thereby making the frame-shaped welded reinforcing portion asymmetrical vertically.

15. In the steel frame building structure described in claim 7, the lower column is fixed to the lower flange of the shaped steel beam, and a lower wall panel is installed at the lateral position of the lower column, and the upper lateral frame end at the corner of the lower wall panel is fixed to the lower flange by a fastening member. The above-mentioned frame-shaped welded reinforcement portion has a lower extension portion that overlaps the upper horizontal frame end of the lower wall panel, and the lower extension portion and the upper horizontal frame end of the lower wall panel are fastened and fixed together with the lower flange in between by fastening members passed through through holes formed in the lower horizontal reinforcement plate portion that constitutes the lower extension portion.

16. The steel frame building structure according to claim 15, characterized in that the frame-shaped welded reinforcement portion has an upper extension portion that overlaps the lower horizontal frame end of the upper wall panel and a lower extension portion that overlaps the upper horizontal frame end of the lower wall panel have the same structure, thereby resulting in a vertically symmetrical structure.

17. The steel frame building structure according to claim 12, characterized in that the upper and lower ends of the first vertical plate and the second vertical plate are also welded and fixed to the upper extension of the upper horizontal reinforcing plate.

18. The steel frame building structure according to claim 12, wherein the upper extension of the upper horizontal reinforcing plate portion has a recess extending in the direction of extension of the upper flange at a position away from the edge of the upper flange, and is welded and fixed to the upper flange at the location of the recess.

19. A steel frame building structure according to claim 12, characterized in that the inner edge of the upper extension of the upper horizontal reinforcing plate portion is fixed to the intersection of the web and the upper flange of the shaped steel beam by groove welding.

20. The steel frame building structure according to claim 12, characterized in that the inner edge of the upper extension of the upper horizontal reinforcing plate portion curves and protrudes toward the web side of the shaped steel beam, and the end of this protruding portion and the web are fixed by welding.

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