Column-beam joint structure

Abstract

To provide a column beam joint structure that does not require skilled welders, is easy to construct, and can also reduce the number of column materials used and shorten a construction period.SOLUTION: A column beam joint structure comprises a plurality of column members 10 erected at predetermined intervals, a lower beam member 11 transverse to the column members 10, and an upper beam member 12 placed on the lower beam member 11 in an intersection state with the lower beam member 11. The column members 10 and the lower beam member 11 are joined together with bolts and nuts BN and the lower beam member 11 and the upper beam member 12 are joined together with the bolts and nuts BN. Between the lower beam member 11 and the upper beam member 12, which cross each other, a brace 16 is attached using the bolts and nuts BN.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a joint structure between columns and beams in a steel-framed building. [Background technology]

[0002] In steel-framed buildings, welding has traditionally been used widely as a means for connecting columns and beams (see, for example, Patent Document 1). The column-beam connection structure described in Patent Document 1 is characterized in that in a column-beam connection structure in which a diaphragm is attached to a steel pipe to form a column and an H-shaped steel beam is welded to this column, haunch plates made of triangular, extremely low yield point steel are attached horizontally to both the left and right sides of the flange of the H-shaped steel beam and welded to the column. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-273971 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the column-beam joint structure described in Patent Document 1, the columns and beams are joined by welding, so skilled welders are required for construction. In addition, when constructing the column-beam joint structure, the welding work of the columns and beams is often performed in a factory, and the completed steel frame members are transported to the construction site, but since the size and weight of the steel frame members are large, there is a problem that a large lifting machine or transport vehicle is required to transport them to the construction site.

[0005] On the other hand, the column-beam joint structure described in Patent Document 1 can be constructed at the construction site, but because skilled welders must be deployed to the construction site, construction is becoming more difficult in the current situation of a continuing labor shortage. In addition, a shortage of welders can cause delays in construction.

[0006] Therefore, the problem that the present invention aims to solve is to provide a column-beam joint structure that is easy to construct without the need for skilled welders, reduces the number of column materials used, and can shorten the construction period. [Means for solving the problem]

[0007] The column-beam joint structure according to the present invention comprises a plurality of columns erected at a predetermined interval, a lower beam horizontally disposed on the columns, and an upper beam placed on the lower beam in a state intersecting with the lower beam, The joining means between the pillar material and the lower beam material, and the joining means between the lower beam material and the upper beam material are characterized by being bolts and nuts.

[0008] In the above-mentioned beam-column joint structure, a diagonal brace can be attached between the lower beam and the upper beam, which are in an intersecting state with each other, using bolts and nuts. Effect of the Invention

[0009] The present invention makes it possible to provide a column-beam joint structure that is easy to construct without requiring skilled welders, reduces the number of column materials used, and shortens construction time. [Brief description of the drawings]

[0010] [Figure 1] 1 is a partially omitted front view showing a column-beam joint structure according to an embodiment of the present invention. [Diagram 2] 2 is an enlarged view of a portion indicated by an arrow A in FIG. 1, with a portion omitted. [Diagram 3] 3 is a cross-sectional view taken along line BB in FIG. 2, with some parts omitted. [Figure 4] 2 is a partially omitted enlarged view of a portion indicated by an arrow C in FIG. [Diagram 5] 5 is a cross-sectional view taken along line DD in FIG. 4, with some parts omitted. [Figure 6] 5 is a cross-sectional view taken along line EE in FIG. 4, with some parts omitted. [Figure 7] 2 is an enlarged view of a portion indicated by an arrow F in FIG. 1, with a portion omitted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, a column-beam joint structure 100 according to an embodiment of the present invention will be described with reference to Figs.

[0012] As shown in Fig. 1, the column-beam joint structure 100 according to this embodiment includes a plurality of columns 10 erected at a predetermined interval S, a lower beam 11 horizontally disposed on the columns 10, and an upper beam 12 placed on the lower beam 11 in a state of crossing the lower beam 11. As shown in Figs. 2 and 3, the lower beam 11 and the upper beam 12 are each formed of an H-shaped steel, and the height 11h of the lower beam 11 is greater than the height 12h of the upper beam 12. Also, as shown in Fig. 5, the column 10 is formed of a square steel pipe.

[0013] 2 and 3, in the region where the lower beam 11 and the upper beam 12 intersect with each other, the upper surface of the upper flange 11f of the lower beam 11 contacts the lower surface of the lower flange 12f of the upper beam 12. In the contact portion of the flanges 11f, 12f, the flanges 11f and 12f are fastened together by a plurality of bolts and nuts BN.

[0014] In the lower beam 11, stiffeners 13 are attached to both sides of a web 11w in a portion located below the contact portion of the flanges 11f, 12f. In addition, in the upper beam 12, stiffeners 14 are attached to both sides of a web 12w in a portion located above the contact portion of the flanges 11f, 12f.

[0015] As shown in Figures 4 and 5, a connecting plate 20 made of a rectangular steel plate is placed on the upper end of the pillar 10 in a state where it closes the upper end opening of the pillar 10, and the connecting plate 20 and the pillar 10 are joined by welding. Then, as shown in Figure 4, the lower beam 11 is laid horizontally on the pillar 10 with the lower surface of the lower flange 11f of the lower beam 11 in contact with the upper surface of the connecting plate 20, and the flange 11f and the connecting plate 20 are fastened to each other by bolts and nuts BN at the contact portion between the lower flange 11f of the lower beam 11 and the connecting plate 20.

[0016] As shown in Fig. 4, stiffeners 13 are attached to both sides of the portion of the web 11w of the lower beam 11 located directly above the column 10. In the portion of the upper flange 11f of the lower beam 11 located directly above the stiffeners 13, the upper beam 12 is arranged to intersect with the lower beam 11 in a three-dimensional manner, and the portion where the upper surface of the upper flange 11f of the lower beam 11 and the lower surface of the lower flange 12f of the upper beam 12 are in contact with each other is fastened by a plurality of bolts and nuts BN.

[0017] As shown in Fig. 4, stiffeners 14 are attached to both sides of the web 12w of the upper beam 12 in the area located directly above the contact portion between the flanges 11f and 12f. Also, gusset plates 15a are fixed to the upper surface of the upper flange 11f of the lower beam 11 at positions facing each other across the upper beam 12. Then, both ends of a knee brace 16a arranged to connect the stiffener 14 and the gusset plate 15a of the upper beam 12 are fixed to the stiffener 14 and the gusset plate 15a using bolts and nuts BN, respectively. A C-shaped steel 17 is attached to the upper surface of the upper flange 12f of the upper beam 12 along the longitudinal direction of the flange 12f.

[0018] Similarly, as shown in Fig. 6, stiffeners 13 are attached to both sides of the portion of the web 11w of the lower beam 11 located directly above the column 10. In the portion of the upper flange 11f of the lower beam 11 located directly above the stiffener 13, the upper beam 12 is arranged to cross the lower beam 11 in a three-dimensional manner, and the portion where the upper surface of the upper flange 11f of the lower beam 11 and the lower surface of the lower flange 12f of the upper beam 12 are in contact with each other is fastened by a plurality of bolts and nuts BN.

[0019] 6, stiffeners 14 are attached to both sides of the web 12w of the upper beam 12 in the area located directly above the contact portion between the flanges 11f and 12f. Gusset plates 15b are fixed to the underside of the lower flange 12f of the upper beam 12 at positions facing each other across the lower beam 11. Then, both end portions of knee braces 16b arranged to connect the stiffener 13 of the lower beam 11 and the gusset plate 15b are fixed to the stiffener 13 and the gusset plate 15b using bolts and nuts BN.

[0020] Next, the longitudinal connection structure of the lower beam 11 will be described with reference to Fig. 7. As shown in Fig. 7, the ends of the lower beams 11, 11 adjacent to each other on the left and right in the drawing are butted together, and splice plates 18 are arranged on both sides of the webs 11w, 11w of the lower beams 11, 11, respectively, straddling the webs 11w, 11w, and fixed to the webs 11w, 11w with a plurality of bolts and nuts BN.

[0021] In addition, an attachment plate 19a is arranged on the upper surfaces of the upper flanges 11f, 11f of the lower beam members 11, 11 so as to straddle the upper surfaces of the flanges 11f, 11f, and an attachment plate 19b is arranged on the lower surfaces (the surfaces connected to the web 11w) of the upper flanges 11f, 11f so as to straddle the lower surfaces of the upper flanges 11f, 11f, and the attachment plate 19a, the flanges 11f, 11f and the attachment plate 19b are fixed using multiple bolts and nuts BN.

[0022] Similarly, a splice plate 19b is arranged on the upper surface (surface connected to the web 11w) of the lower flanges 11f, 11f of the lower beams 11, 11 so as to straddle the lower surface of the flanges 11f, 11f, and a splice plate 19a is arranged on the lower surface of the lower flanges 11f, 11f so as to straddle the lower surface of the upper flanges 11f, 11f, and the splice plate 19b, the flanges 11f, 11f and the splice plate 19a are fixed using a plurality of bolts and nuts BN. Although not shown, the longitudinal connection structure of the upper beam 12 (see FIG. 6) is also similar to the connection structure shown in FIG. 7.

[0023] As described above, in the column-beam joint structure 100 shown in Fig. 1, the joint means between the column material 10 and the lower beam material 11, and the joint means between the lower beam material 11 and the upper beam material 12 are bolt nuts BN, so that skilled welders are not required to construct the column-beam joint structure 100. In addition, the joining work between the column material 10 and the lower beam material 11, and the joining work between the lower beam material 11 and the upper beam material 12 can be performed by an average worker using general tools, so the construction is easy and it is also possible to shorten the construction period.

[0024] In addition, the column-beam joint structure 100 shown in Figure 1 comprises a lower beam 11 horizontally disposed on a number of columns 10 arranged upright at a predetermined interval S, and an upper beam 12 placed on the lower beam 11 in a state of intersecting with the lower beam 11.Since the joining means for the columns 10, the lower beam 11 and the upper beam 12 are bolts and nuts BN, the interval S between adjacent columns 10, 10 can be made wider, thereby reducing the number of columns S used, which is effective in reducing building materials.

[0025] Note that the column-beam joint structure 100 described based on Figures 1 to 7 shows one example of the column-beam joint structure according to the present invention, and the column-beam joint structure according to the present invention is not limited to the column-beam joint structure 100 described above. [Industrial Applicability]

[0026] INDUSTRIAL APPLICABILITY The column-beam joint structure according to the present invention can be widely used in industrial fields such as the civil engineering and construction industries for constructing steel-framed buildings. [Explanation of symbols]

[0027] 10 Pillar material 11 Lower beam 11f, 12f flange 11h,12h Height 11w,12w Web 12 Upper beam 13,14 Stiffener 15a, 15b Gusset plate 16a,16b Cane 17 C-shaped steel 18,19a,19b attachment plate 20 Connecting plate 100 Column beam joint structure BN Bolts and nuts S interval

Claims

[Claim 1] A joint structure between columns and beams in a steel-framed building, The system comprises a plurality of pillars erected at a predetermined interval, the pillars having connecting plates welded to their upper ends, a lower beam made of H-shaped steel and laid horizontally on the pillars with the lower surfaces of the flanges in contact with the upper surfaces of the connecting plates, and an upper beam made of H-shaped steel and with the lower surface of the flange placed on the lower beam in a state where it intersects with the lower beam directly above the pillars, The joint means between the column member and the lower beam member is a bolt nut that fastens the connecting plate and the flange of the lower beam member, and the joint means between the lower beam member and the upper beam member is a bolt nut, A column-beam joint structure in which a plurality of diagonal braces are attached using bolts and nuts between the lower beam and the upper beam, which are in a crossing state with each other; The multiple knee braces are arranged in a connected state by connecting first and second stiffeners attached to both sides of the web of the lower beam at a portion located directly above the column and first and second gusset plates respectively fixed to the underside of the lower flange of the upper beam at opposing positions across the lower beam, and third and fourth stiffeners attached to both sides of the web of the upper beam at a region located directly above the contact portion between the upper flange of the lower beam and the lower flange of the upper beam and third and fourth gusset plates respectively fixed to the upper surface of the upper flange of the lower beam at opposing positions across the upper beam, and both end portions of each knee brace are fixed to the first, second, third and fourth stiffeners and first, second, third and fourth gusset plates respectively using bolts and nuts.

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