JP7169836B2 - Building column-beam joint structure - Google Patents

Description

The present invention relates to a beam-column joint structure of a building.

As shown in Non-Patent Document 1, in a building comprising reinforced concrete columns and steel beams, that is, a building built by the column RC beam S construction method, the beams intersect each other and the beams and the columns intersect each other. There is a beam-to-column joint where

As shown in FIG. 12, H-shaped steel is used as the beams 32 that intersect each other at the column-to-beam joint 31 . The beam 32 has a plate-like web 32a standing vertically and flanges 32b horizontally protruding from both upper and lower ends of the web 32a. A covering plate 33 welded to the side surfaces of the web 32a and the flange 32b of the beam 32 in the thickness direction is provided at the portion sandwiched between the crossing beams 32 and corresponding to the outer side surface of the column. It is The reinforcing bars of the column are passed through the portion surrounded by the closing plate 33 in the column-to-beam joint 31, and the concrete of the same column is poured.

FIG. 13 shows a plane cross-section of the welded portion between the closing plate 33 and the beam 32. As shown in FIG. As can be seen from FIG. 13, the end of the closing plate 33 on the side of the web 32a (the left end in FIG. 13) is welded to the web 32a and the flange 32b on both sides in the thickness direction (upper and lower sides in FIG. 13). there is The closing plate 33 is fixed to the beam 32 by such welding.

In the column RC beam S construction method, after forming a reinforced concrete column, a crossing portion between beams (column-beam joint) is arranged at the upper end of the column. Furthermore, in the part surrounded by the closing plate at the beam-to-column joint, reinforcing bars for forming a column above the beam-to-column joint are passed, and concrete for forming the same column is poured. . The concrete and the reinforcing bars form a column above the column-to-beam joint. In the pillar RC beam S construction method of the building, the pillars and beams are formed step by step toward the upper level in this way. At the column-to-beam joints of a building constructed by the RC-beam S construction method, the blocking plate acts as a shear resistance and constrains the concrete in the column-to-beam joints.

Design and Construction of Reinforced Concrete Column and Steel Beam Mixed Structure January 10, 2001 Architectural Institute of Japan

In the beam-to-column joint structure of the building described above, when the end of the closing plate 33 on the side of the web 32a shown in FIGS. (top and bottom sides in FIG. 13) must be welded to web 32a and flange 32b. However, welding to the web 32a and the flange 32b on the side surface (upper side in FIG. 13) near the intersection of the beams 32 among the thickness direction side surfaces at the end of the closing plate 33 is From the inside of the narrow portion surrounded by the closing plate 33, the boundary between the end of the closing plate 33 and the web 32a and the flange 32b must be inspected. Therefore, the operator who performs the welding must put his/her hand into a narrow portion such as the side surface of the web 32a and the flange 32b in the thickness direction, which is the portion surrounded by the intersecting beams 32 and the closing plate 33, for welding. It is undeniable that this makes it difficult to fix the closing plate 33 to the beam 32 .

SUMMARY OF THE INVENTION An object of the present invention is to provide a beam-column joint structure for a building that can prevent difficulty in fixing a closing plate to a beam.

Means for solving the above problems and their effects will be described below.
A beam-to-column joint structure of a building that solves the above problems is a beam-to-column joint where beams made of H-beam intersect each other and beams intersect with each other in a building comprising reinforced concrete columns and steel frame beams. Applies to In the portion sandwiched between the intersecting beams and corresponding to the outer side surface of the column, it is fixed to the side surface in the thickness direction of the web of the beam and the side surface in the thickness direction of the upper and lower flanges of the beam. A blocking plate is provided. Then, the reinforcing bars of the column are passed through the portion surrounded by the closing plate at the column-to-beam joint, and the concrete of the same column is poured. Between the upper and lower flanges of the beam and corresponding to the outer side surface of the column, plate-like stiffeners extending in the vertical direction are arranged, and the stiffeners extend in the thickness direction of the web of the beam and the side surfaces of the flanges. welded against. The closing plate is fixed to the stiffener in a state in which the end on the web side is inserted between the upper and lower flanges and is inserted into the side surface of the stiffener between the upper and lower flanges in the thickness direction of the stiffener near the intersection of the beams. and are fixed to the lateral sides of the webs and flanges of the beam in the thickness direction via their stiffeners.

According to the above configuration, when fixing the closing plate to the side surfaces of the web and the flange of the beam in the thickness direction, first, the stiffener is welded to the side surface of the web and the flange of the beam in the thickness direction. Specifically, the stiffener is welded to the thickness direction side surfaces of the web and flange on both sides of the stiffener in the thickness direction, both on the side near the intersection of the beams and on the side remote from the intersection. Welding to the web and flange on the side of the stiffener that is closer to the intersection of the beams on both sides of the stiffener in the thickness direction is performed in a state where there is no blocking plate in the portion sandwiched between the crossing beams. The closing plate does not make it difficult to perform the welding. After that, the end of the closing plate on the web side is inserted between the upper and lower flanges into the side surface near the intersection of the beams among the both side surfaces in the thickness direction of the stiffener. Fixed. Since the closing plate is fixed to the stiffener, it has to be fixed at a position away from the side surface of the web in the thickness direction of the beam, and must not be fixed in a narrow place near the side surface in the thickness direction of the web. also get better. Therefore, since the fixing work does not have to be performed in a narrow space, it is possible to prevent the work from becoming difficult to perform. By fixing the closing plate to the stiffener, the closing plate is fixed to the side surfaces of the web and the flange of the beam in the thickness direction via the stiffener.

In the beam-to-column joint structure of the building, the portion of the stiffener in the covering plate inserted into the side surface near the intersection of the beams out of both sides in the thickness direction is welded to the stiffener on the side remote from the intersection of the two, and the closure plate is fixed to the stiffener by the welding.

According to this configuration, the closing plate is fixed to the stiffener welded to the side surface of the web and flange in the thickness direction of the beam on the side surface near the intersecting portion of the beams, out of both side surfaces of the stiffener in the thickness direction of the closing plate. by welding to the stiffener of the part inserted into the Since this welding is performed from both side surfaces in the thickness direction of the stiffener, the side surface away from the intersection of the beams, the work for the welding is carried out in a narrow place such as between the beams and inside the part surrounded by the closing plate. You don't have to do it. Therefore, since the work for welding need not be performed in a narrow space, it is possible to suppress difficulty in performing the work. In addition, when concrete is poured into the part surrounded by the blocking plate at the beam-to-column joint, the concrete pushes the blocking plate away from the intersection of the beams, which causes the edge of the blocking plate on the beam side to move. pressed against the stiffener. Therefore, of the stiffener on both sides in the thickness direction, the part inserted into the side near the intersection of the beams is the side near the intersection of the beams out of the both sides in the thickness direction of the stiffener. Even if the stiffener is not welded to the same stiffener, the fixation between the stiffener and the closing plate on the side face side is not weakened.

In the beam-to-column joint structure of the building, of the both side surfaces in the thickness direction of the stiffener in the closing plate, the portion inserted into the side surface near the intersection of the beams is fastened to the stiffener with bolts and nuts, It is conceivable that the closing plate is fixed to the stiffener by these bolts and nuts.

According to this configuration, the closing plate is fixed to the stiffener welded to the side surface of the web and flange in the thickness direction of the beam on the side surface near the intersecting portion of the beams, out of both side surfaces of the stiffener in the thickness direction of the closing plate. This is done through fastening with bolts and nuts between the part inserted into the stiffener and the stiffener. Fastening by the bolt and nut is performed at a position away from the side surface of the web in the thickness direction of the beam, and does not have to be performed in a narrow place such as near the side surface in the thickness direction of the web. Therefore, it is possible to suppress difficulty in performing the work for tightening with the bolt and the nut because the work does not have to be performed in a narrow space.

In the beam-to-column joint structure of the building, the portion of the blocking plate that is inserted into the side surface near the intersection of the beams out of both sides in the thickness direction of the stiffener is fastened to the stiffener with bolts and nuts, Of the two side surfaces in the thickness direction of the same portion, the side surface away from the intersection of the beams is welded to the stiffener, and the closure plate is fixed to the stiffener by the welding, bolts and nuts. It is conceivable that there is

According to this configuration, the closing plate can be fixed to the stiffener as follows. That is, the stiffener is fastened with a bolt and a nut to the part of the stiffener in the blocking plate that is inserted into the side surface near the intersection of the beams, and under this condition, the thickness of the part is increased. Welding to the stiffeners is performed on the lateral sides away from the intersections of the beams. In this way, the stiffener and the cover plate are fastened together with the bolts and nuts, and the welding is performed, thereby preventing the stiffener and the cover plate from being displaced from each other during welding. , the welding can be facilitated. In addition, when concrete is poured into the part surrounded by the blocking plate at the column-to-beam joint, the concrete pushes the blocking plate away from the intersection of the beams, so that the stiffener in the blocking plate thickness direction Of the two side surfaces, the portion inserted into the side surface near the intersection of the beams tends to rotate about the welded portion in the direction away from the stiffener. These problems can be suppressed by the bolt and nut.

In the column-to-beam joint structure of the building, the stiffener may protrude more than the flange from the side surface of the web in the thickness direction.
According to this configuration, in the stiffener, by sliding the closing plate up and down against the portion of the stiffener that protrudes larger than the upper and lower flanges with respect to the side surface of the web in the thickness direction, the edge of the closing plate on the web side is moved. can be inserted into the side surface near the crossing portion of the beams among both side surfaces in the thickness direction of the stiffener. Therefore, the portion of the closing plate corresponding to the stiffener can be easily inserted into the side surface near the crossing portion of the beams among both side surfaces in the thickness direction of the stiffener.

In the beam-to-column joint structure of the building, the part of the stiffener in the covering plate inserted into the side surface near the intersection of the beams on both sides in the thickness direction is at the edge of the side surface in the thickness direction of the web. , having a bend that bends away from the stiffener.

According to this configuration, when concrete is poured into the portion surrounded by the blocking plate at the column-to-beam joint, the concrete pushes the blocking plate in a direction away from the intersection of the beams. Of the two side surfaces in the thickness direction of the stiffener, the portion inserted into the side surface near the intersection of the beams tends to displace in the direction away from the tip of the stiffener. However, such displacement is suppressed by the bending portion being filled with the poured concrete, which resists the displacement.

ADVANTAGE OF THE INVENTION According to this invention, it can suppress that the operation|work for fixing a closing board to a beam becomes difficult.

The perspective view which shows the column-to-beam joint of a building. The perspective view which shows a same column beam joint part. The perspective view which shows the cross|intersection part of beams in a column beam joint part. FIG. 4 is a cross-sectional plan view showing the stiffeners welded to the web and flange of the beam and the portion of the baffle plate that joins the stiffeners; The perspective view which shows the assembly|attachment aspect of the closing plate with respect to a beam. The perspective view which shows the assembly|attachment aspect of the closing plate with respect to a beam. The perspective view which shows the fixed aspect of the closing plate with respect to a stiffener. FIG. 4 is a cross-sectional plan view showing the stiffeners welded to the web and flange of the beam and the portion of the baffle plate that joins the stiffeners; The perspective view which shows the assembly|attachment aspect of the closing plate with respect to a beam. Sectional drawing which shows the other example of a closure board. FIG. 11 is a perspective view showing another example of a manner of fixing the closing plate to the stiffener; The perspective view which shows the conventional example of the cross|intersection part of beams in the beam-column joint of a building. FIG. 4 is a cross-sectional plan view showing a conventional example of a fixed form between a closing plate and a beam.

[First embodiment]
A first embodiment of a column-to-beam joint structure of a building constructed by the column RC-beam S construction method will be described below with reference to FIGS. 1 to 6. FIG.

As shown in FIGS. 1 and 2, a building built by the column RC beam S construction method includes reinforced concrete columns 1 and steel frame beams 2 . In such a building, there are column-to-beam joints 3 where the beams 2 intersect each other and the beams 2 intersect with the pillar 1 . The beam 2 is made of H-section steel and has a plate-like web 2a that stands vertically and flanges 2b that horizontally protrude from both upper and lower ends of the web 2a.

FIG. 3 shows crossing beams 2 at the beam-to-column joint 3 shown in FIGS. 1 and 2 . Plate-shaped stiffeners 4 extending in the vertical direction are arranged between the upper and lower flanges 2b of the beam 2 and corresponding to the outer surface of the column 1 (FIGS. 1 and 2). This stiffener 4 is perpendicular to the thickness direction side surfaces of the web 2a and the flange 2b of the beam 2 and is welded to these side surfaces. The amount of protrusion of the stiffener 4 from the side surface of the web 2a in the thickness direction of the beam 2 is equal to the amount of protrusion of the upper and lower flanges 2b of the beam 2 from the side surface.

In the column-to-beam joint 3, the portions sandwiched between the crossing beams 2 and corresponding to the outer surface of the column 1 are provided with L-shaped closing plates 5 connected to the stiffeners 4. ing. The ends of the beams 2 on the web 2a side of the closing plate 5 are fixed to the stiffeners 4 in a state where they are inserted into the side surfaces of the stiffeners 4 near the intersections of the beams 2 in the thickness direction of the stiffeners 4. there is Of the both side surfaces of the stiffener 4 in the thickness direction of the closing plate 5, the end portion on the web 2a side of the portion inserted into the side surface near the intersection of the beams 2 is located between the upper and lower flanges 2b of the beam 2. is doing.

FIG. 4 shows a plane cross-section of the stiffener 4 welded to the side surface of the web 2a and the flange 2b of the beam 2 in the thickness direction, and the portion of the closing plate 5 connected to the stiffener 4. As shown in FIG. As can be seen from FIG. 4, the stiffener 4 is welded on both sides in its thickness direction (both upper and lower sides in FIG. 4) to the side surfaces in its thickness direction of the web 2a and the flange 2b. Such welding secures the stiffener 4 to the lateral sides of the beam 2 in the thickness direction of the web 2a and the flange 2b. The portions R2 and R3 welded as described above extend along the boundaries between the stiffener 4, the web 2a and the flange 2b.

In addition, the portion of the blocking plate 5 inserted into the side surface (the upper side in FIG. 4) near the intersection of the beams 2 among both side surfaces of the stiffener 4 in the thickness direction is the beam It is welded to the stiffener 4 on the side remote from the intersection of the two (lower side in FIG. 4). A portion R1 of the closing plate 5 welded to the stiffener 4 extends vertically along the stiffener 4 (a direction perpendicular to the plane of FIG. 4). The closing plate 5 is fixed to the stiffener 4 by welding. Furthermore, by fixing the closing plate 5 to the stiffener 4 , the closing plate 5 is fixed to the web 2 a and the flange 2 b of the beam 2 via the stiffener 4 .

Fillet welding, for example, can be considered as the welding described above, but other welding such as partial penetration welding and full penetration welding are also possible.
In the building column RC beam S construction method, after forming a reinforced concrete column 1 (FIG. 2, etc.), the intersection of beams 2 shown in FIG. Furthermore, as shown in FIG. 2, in the portion surrounded by the closing plate 5 at the crossing portion (column-to-beam joint 3) of the beams 2, there is a space for forming the column 1 above the column-to-beam joint 3. While reinforcing bars 6 are passed through, concrete 11 is poured to form the same column 1 as shown in FIG. The concrete 11 and the reinforcing bars 6 form the column 1 above the column-to-beam joint 3 above the column-to-beam joint 3 . In the pillar RC beam S construction method of the building, the pillar 1 and the beam 2 are thus formed step by step toward the upper level. At the beam-to-column joint 3 of the building constructed by the RC-beam S construction method, the closing plate 5 acts as a shear resistance and constrains the concrete 11 in the beam-to-column joint 3 by the closing plate 5 .

Next, the operation of the column-to-beam joint structure of the building in this embodiment will be described.
When fixing the closing plate 5 to the side surfaces of the web 2a and the flange 2b of the beam 2 in the thickness direction, the stiffener 4 is first welded to the side surface of the web 2a and the flange 2b in the thickness direction as shown in FIG. be done. Specifically, the ends of the stiffener 4 on the side of the web 2a are welded to the side surfaces of the web 2a and the flange 2b in the thickness direction on both sides of the stiffener 4 in the thickness direction (upper and lower sides in FIG. 4). Regarding welding to the side surfaces of the web 2a and the flange 2b in the thickness direction on the side (upper side in FIG. 4) near the intersection of the beams 2 among the thickness direction sides of the stiffener 4, Since the closing plate 5 is not present in the portion (see FIG. 3) sandwiched between the two, the welding is not made difficult by the closing plate 5. After that, the end of the closing plate 5 on the side of the web 2a (the left end in FIG. 4) is inserted into the side surface (upper side in FIG. 4) of the stiffener 4 near the intersection of the beams 2 in the thickness direction of the stiffener 4. be

Specifically, as shown in FIG. 5, the L-shaped closing plate 5 is bent at an acute angle to the extent that it can return to its original shape by elasticity. Then, after inserting the cover plate 5 bent as described above in the part sandwiched between the crossing beams 2 and closer to the crossing part of the beams 2 than the stiffener 4, the cover plate 5 is elastically bent. When the original state is restored, the portion of the closing plate 5 corresponding to the stiffener 4 comes into contact with the same stiffener 4 . As a result, as shown in FIG. 6, the portion of the closing plate 5 corresponding to the stiffener 4 is inserted into the side surface of the stiffener 4 near the intersection of the beams 2 in the thickness direction of the stiffener 4 . Become. Further, at this time, the portion of the closing plate 5 corresponding to the stiffener 4, that is, the end portion of the beam 2 on the side of the web 2a is located between the upper and lower flanges 2b of the beam 2. As shown in FIG.

A portion of the closing plate 5 corresponding to the stiffener 4 is inserted into a side surface of the stiffener 4 near the intersection of the beams 2 among both side surfaces in the thickness direction of the stiffener 4 . At this time, the portion of the closing plate 5 corresponding to the stiffener 4 (the end on the side of the web 2a) is positioned between the upper and lower flanges 2b of the beam 2, so that the closing plate 5 is vertically positioned with respect to the stiffener 4. be. Under this condition, the end of the closing plate 5 on the side of the web 2a is located on the side away from the intersection of the beams 2 (lower side in FIG. 4) among both sides in the thickness direction, as indicated by R1 in FIG. , are welded to the stiffener 4 . Since this welding is performed to the stiffener 4, it is performed at a position away from the side surface in the thickness direction of the web 2a. Further, the welding is performed from the side (lower side in FIG. 4) away from the intersection of the beams 2 among both sides of the stiffener 4 in the thickness direction. For these reasons, the work for welding need not be performed in narrow places such as near the side surfaces in the thickness direction of the web 2a or inside the portion surrounded by the beams 2 and the closing plate 5. Therefore, since the work for welding need not be performed in a narrow space, it is possible to suppress difficulty in performing the work.

After that, the crossing portion of the beams 2 (column-to-beam joint 3) is arranged at the upper end of the column 1 as shown in FIG. Then, a reinforcing bar 6 for forming the column 1 above the beam-to-column joint 3 is passed through the portion surrounded by the closing plate 5 in the beam-to-column joint 3, and as shown in FIG. Concrete 11 to form 1 is poured. The concrete poured in this way pushes the closing plate 5 away from the intersection of the beams 2, so that the end of the closing plate 5 on the side of the web 2a shown in FIG. Therefore, of the both side surfaces of the stiffener 4 in the thickness direction, the portion of the closing plate 5 inserted into the side surface side (upper side in FIG. 4) near the intersection of the beams 2 is Even if the stiffener 4 is not welded to the stiffener 4 on the side surface near the intersection of the beams 2, the fixation between the stiffener 4 and the closing plate 5 on the side surface is not weakened.

According to this embodiment detailed above, the following effects can be obtained.
(1) When the stiffener 4 is welded to the side surfaces of the web 2a and the flange 2b in the thickness direction of the side surfaces of the stiffener 4 in the thickness direction, the side surface near the intersection of the beams 2 is welded to the beam 2. This is done in a state where the closing plate 5 does not exist in the portion sandwiched between them. Therefore, the closing plate 5 does not make it difficult to perform the welding. In addition, the end of the closing plate 5 on the side of the web 2a is inserted into one of the two side surfaces in the thickness direction of the stiffener 4 welded to the web 2a and the flange 2b, which is close to the intersection of the beams 2. and its end is fixed to the stiffener 4 by welding. Since the fixing at this time is performed on the stiffener 4, it is performed at a position away from the side surface in the thickness direction of the web 2a, and is not performed in a narrow place near the side surface in the thickness direction of the web 2a. It gets better. Therefore, since it is not necessary to perform the fixation in a narrow space, it is possible to suppress difficulty in performing the work for the fixation. For these reasons, the work for fixing the closing plate 5 to the beam 2, more specifically, the work for fixing the closing plate 5 to the web 2a and the flange 2b of the beam 2 via the stiffener 4 becomes difficult. can be suppressed.

(2) The above welding of the closing plate 5 to the stiffener 4 is a state in which the ends of the closing plate 5 on the side of the web 2a are inserted into the side surfaces of the stiffener 4 near the crossing portion of the beams 2 among the both side surfaces in the thickness direction of the stiffener 4. Of the two side surfaces in the thickness direction of the inserted portion, the stiffener 4 is reinforced on the side surface away from the intersection of the beams 2 . Since the welding is performed from the side surface side in this way, the work for the welding does not have to be performed in a narrow space such as the inside of the portion surrounded by the beams 2 and the closing plate 5 . Therefore, since the work for welding need not be performed in a narrow space, it is possible to suppress difficulty in performing the work.

(3) The welding of the closing plate 5 to the stiffener 4 is such that the end of the closing plate 5 on the side of the web 2a of the beam 2 is positioned between the upper and lower flanges 2b of the beam 2 so that the closing plate 5 is welded to the stiffener 4. is positioned vertically. Therefore, it is possible to prevent the stiffener 4 and the closing plate 5 from being displaced in the vertical direction during the welding, thereby facilitating the welding.

[Second embodiment]
Next, a second embodiment of this embodiment will be described with reference to FIGS. 7 to 9. FIG.
As shown in FIG. 7, in the column-to-beam joint 3 of the present embodiment, the stiffener 4 welded to the web 2a and the flange 2b of the beam 2 is vertically attached to the beam 2 against the side surface of the web 2a in the thickness direction. It protrudes greatly from the flange 2b of. The portion of the baffle plate 5 corresponding to the stiffener 4 (the end portion on the side of the web 2a) is the crossing portion of the beams 2 among the both side surfaces in the thickness direction of the portion of the stiffener 4 that protrudes from the web 2a beyond the flange 2b. and fastened with a plurality of bolts 7 and nuts 8 to the above portion.

As shown in FIG. 8, holes 9 and 10 for passing bolts 7 are formed in the overlapping portions of the stiffener 4 and the closing plate 5 in the thickness direction. In addition, the end portion of the closing plate 5 on the side of the web 2a was inserted into the side surface (upper side in FIG. Of the two side surfaces in the thickness direction of the portion, the side surface away from the intersection of the beams 2 (lower side in FIG. 8) is welded to the stiffener 4 . The closing plate 5 is fixed to the stiffener 4 by this welding, the bolt 7 and the nut 8 . Furthermore, by fixing the closing plate 5 to the stiffener 4 , the closing plate 5 is fixed to the web 2 a and the flange 2 b of the beam 2 via the stiffener 4 .

As shown in FIG. 9, when the blocking plate 5 is fixed to the stiffener 4 at the crossing portion (column-to-beam joint 3) of the beams 2, the stiffener 4 at the portion sandwiched between the crossing beams 2 is fixed. An L-shaped closing plate 5 is slid downward from above toward the side closer to the intersection of the beams 2 than the beams 2 . As a result, the portion of the closing plate 5 corresponding to the stiffener 4 contacts the side surface near the intersection of the beams 2 among both side surfaces in the thickness direction of the portion of the stiffener 4 that protrudes from the flange 2b of the beam 2. . At this time, the portion of the closing plate 5 corresponding to the stiffener 4 (the end portion on the side of the web 2a) is inserted into the side surface of the stiffener 4 near the intersection of the beams 2 in the thickness direction of the stiffener 4. Become. Further, at this time, the closing plate 5 is aligned with the stiffener 4 so that the hole 9 of the stiffener 4 and the hole 10 of the closing plate 5 are positioned correspondingly.

A bolt 7 is inserted through the communicating holes 9 and 10 , and the stiffener 4 and the cover plate 5 are fastened together with the bolt 7 and the nut 8 . Furthermore, the end of the closing plate 5 on the side of the web 2a is inserted into the side surface near the intersection of the beams 2 among both side surfaces in the thickness direction of the stiffener 4, as indicated by R1 in FIG. The stiffener 4 is welded to the stiffener 4 on the side (lower side in FIG. 8) away from the intersection of the beams 2 among both sides in the thickness direction of the portion inserted into the above. As described above, the stiffener 4 and the cover plate 5 are fastened with the bolts 7 and nuts 8, and the stiffener 4 and the cover plate 5 are welded together, thereby fixing the cover plate 5 to the stiffener 4. be.

According to the present embodiment described in detail above, in addition to the effect (1) of the first embodiment, the following effects can be obtained.
(4) The blocking plate 5 is fixed to the stiffener 4 by bolts between the stiffener 4 and the portion of the blocking plate 5 inserted into the side surface near the intersection of the beams 2 among both side surfaces of the stiffener 4 in the thickness direction. 7 and a nut 8 and welding to the stiffener 4 of said part. Therefore, the number of bolts 7 and nuts 8 required to fix the closing plate 5 to the stiffener 4 can be reduced.

(5) Fastening between the stiffener 4 and the closing plate 5 by means of the bolt 7 and the nut 8 is performed at a position away from the side surface of the beam 2 in the thickness direction of the web 2a. You don't have to do it in a narrow place such as near the side. Therefore, since the work for fastening with the bolt 7 and the nut 8 does not have to be performed in a narrow space, it is possible to suppress difficulty in performing the work. Therefore, it is possible to prevent difficulty in the work for fixing the covering plate 5 to the beam 2 , more specifically, the work for fixing the covering plate 5 to the web 2 a of the beam 2 via the stiffener 4 .

(6) A portion of the stiffener 4 of the blocking plate 5 that is inserted into the side surface near the intersection of the beams 2 among both sides in the thickness direction of the stiffener 4 and the same stiffener 4 are fastened with bolts 7 and nuts 8, and the state is maintained. It is possible to weld the stiffeners 4 on the side remote from the intersection of the beams 2 among both sides in the thickness direction of the above portion. As described above, the stiffener 4 and the cover plate 5 are welded together with the bolt 7 and the nut 8, so that the stiffener 4 and the cover plate 5 are misaligned during welding. can be suppressed, the welding can be facilitated.

(7) The stiffener 4 protrudes from the side surface of the beam 2 in the thickness direction of the web 2a to a greater extent than the upper and lower flanges 2b. It is also possible to insert the web 2a side end portion of the baffle plate 5 into the side surface near the intersection of the beams 2 among both side surfaces of the stiffener 4 in the thickness direction. Therefore, the portion of the closing plate 5 corresponding to the stiffener 4 can be easily inserted into the side surface near the intersection of the beams 2 among both side surfaces of the stiffener 4 in the thickness direction.

(8) When the concrete 11 is poured into the portion of the beam-column joint 3 surrounded by the covering plate 5 , the concrete 11 pushes the covering plate 5 away from the intersection of the beams 2 . As a result, the portion of the closing plate 5 inserted into the side surface near the intersection of the beams 2 out of both side surfaces in the thickness direction of the stiffener 4 moves away from the stiffener 4 to the welded portion R1 ( (Fig. 8). These problems can be suppressed by the bolts 7 and nuts 8 that fasten the stiffener 4 and the cover plate 5 together.

[Other embodiments]
It should be noted that each of the above-described embodiments can be modified, for example, as follows.
- In the first embodiment, the portion of the closing plate 5 inserted into the side surface near the intersection of the beams 2 among both sides in the thickness direction of the stiffener 4 is the web 2a of the beam 2 as shown in FIG. It may have a bent portion 5a that bends away from the stiffener 4 at the end portion on the side surface side in the thickness direction.

In this case, when the concrete 11 is poured into the portion of the beam-column joint 3 surrounded by the covering plate 5 , the concrete 11 pushes the covering plate 5 away from the intersection of the beams 2 . As a result, the portion of the closing plate 5 that is inserted into the side surface near the intersection of the beams 2 among both side surfaces in the thickness direction of the stiffener 4 tends to displace away from the tip of the stiffener 4 . However, such displacement is suppressed by the bent portion 5a filled with the poured concrete 11 acting as a resistance to the displacement.

The bent portion 5a shown in FIG. 10 is bent 180° with respect to the portion of the covering plate 5 overlapping the stiffener 4 in the thickness direction, but it is bent at an angle other than 180°, such as 90° or 135°. can be anything.

- In the first embodiment, the stiffener 4 and the closing plate 5 may be fixed not only by welding but also by fastening with bolts and nuts as in the second embodiment.

- In the first embodiment, the cover plate 5 may be fixed to the stiffener 4 by fastening the stiffener 4 and the cover plate 5 with bolts and nuts without welding the cover plate 5 to the stiffener 4 . In this case, the end of the closing plate 5 on the side of the web 2a and the portion where the end of the stiffener 4 is inserted into the side near the intersection of the beams 2 among both sides in the thickness direction are fastened with bolts and nuts. Thus, the stiffener 4 and the closing plate 5 can be fixed only by these bolts and nuts.

- In the second embodiment, it is not always necessary to weld the closing plate 5 to the stiffener 4 . In this case, bolts 7 and nuts 8 are used to connect the ends of the closing plate 5 on the side of the web 2a and the portions of the stiffeners 4 where the ends are inserted into the side surfaces near the intersections of the beams 2 among both sides in the thickness direction. By tightening them, the stiffener 4 and the closing plate 5 can be fixed only with the bolts 7 and the nuts 8 .

- In the second embodiment, as shown in FIG. 11, the closing plate 5 may be fixed to the stiffener 4 only by welding. In this case, since fastening with the bolts 7 and the nuts 8 is not required, the work required for fixing the cover plate 5 to the stiffener 4 can be reduced.

- In the first and second embodiments, the surface of the stiffener 4 opposite to the intersection of the beams 2, that is, the surface opposite to the side where the closing plate 5 is inserted, and the thickness of the web 2a of the beam 2 The support plate may be welded across the sides of the direction. In this case, when the blocking plate 5 and the stiffener 4 are pushed away from the intersection of the beams 2 by the concrete 11 poured into the portion surrounded by the blocking plate 5 in the beam-to-column joint 3, The support plate can suppress deformation of the stiffener 4 .

DESCRIPTION OF SYMBOLS 1... Column 2... Beam 2a... Web 2b... Flange 3... Column beam joint part 4... Stiffener 5... Closing plate 5a... Bent part 6... Reinforcement bar 7... Bolt 8... Nut 9 ... holes, 10 ... holes, 11 ... concrete.

Claims (6)

Applied to a column-beam joint where beams made of H-shaped steel intersect and the beams intersect with the column in a building comprising reinforced concrete columns and steel beams,
At the portion sandwiched between the intersecting beams and corresponding to the outer side surface of the column, the side surface of the web in the thickness direction of the beam and the side surface of the upper and lower flanges of the beam in the thickness direction are fixed. A closing plate is provided,
In a beam-to-column joint structure of a building in which the reinforcing bars of the column are passed through the portion surrounded by the closing plate at the beam-to-column joint and the concrete of the same column is poured,
Between the upper and lower flanges of the beam and corresponding to the outer surface of the column, a plate-like stiffener extending in the vertical direction is arranged, and the stiffener extends in the thickness direction of the web of the beam and the flange. welded to the sides,
The closing plate is fixed to the stiffener in a state in which the end on the web side is inserted between the upper and lower flanges and is inserted into the side surface of the stiffener between the upper and lower flanges in the thickness direction of the stiffener near the intersection of the beams. and is fixed to the lateral sides of the webs and flanges of the beam in the thickness direction via the stiffeners thereof ,
Of the both side surfaces in the thickness direction of the stiffener in the closing plate, the portion inserted into the side surface side near the crossing portion of the beams is separated from the crossing portion of the beams out of the both side surfaces in the thickness direction of the same portion. A column-to-beam joint structure for a building, characterized in that the stiffener is welded to the stiffener on a lateral side thereof, and the closing plate is fixed to the stiffener by the welding . Applied to a column-beam joint where beams made of H-shaped steel intersect and the beams intersect with the column in a building comprising reinforced concrete columns and steel beams,
At the portion sandwiched between the intersecting beams and corresponding to the outer side surface of the column, the side surface of the web in the thickness direction of the beam and the side surface of the upper and lower flanges of the beam in the thickness direction are fixed. A closing plate is provided,
In a beam-to-column joint structure of a building in which the reinforcing bars of the column are passed through the portion surrounded by the closing plate at the beam-to-column joint and the concrete of the same column is poured,
Between the upper and lower flanges of the beam and corresponding to the outer surface of the column, a plate-like stiffener extending in the vertical direction is arranged, and the stiffener extends in the thickness direction of the web of the beam and the flange. welded to the sides,
The closing plate is fixed to the stiffener in a state in which the end on the web side is inserted between the upper and lower flanges and is inserted into the side surface of the stiffener between the upper and lower flanges in the thickness direction of the stiffener near the intersection of the beams. and is fixed to the lateral sides of the webs and flanges of the beam in the thickness direction via the stiffeners thereof ,
Of the both side surfaces of the stiffener in the thickness direction of the closing plate, the portion inserted into the side surface near the intersection of the beams is fastened to the stiffener with a bolt and nut, and the same portion is inserted in the thickness direction. The stiffener is welded to the stiffener on the side of both side surfaces away from the intersection of the beams, and the closure plate is fixed to the stiffener by the welding, the bolt and the nut. A column-to-beam joint structure of a building characterized by : Applied to a column-beam joint where beams made of H-shaped steel intersect and the beams intersect with the column in a building comprising reinforced concrete columns and steel beams,
At the portion sandwiched between the intersecting beams and corresponding to the outer side surface of the column, the side surface of the web in the thickness direction of the beam and the side surface of the upper and lower flanges of the beam in the thickness direction are fixed. A closing plate is provided,
In a beam-to-column joint structure of a building in which the reinforcing bars of the column are passed through the portion surrounded by the closing plate at the beam-to-column joint and the concrete of the same column is poured,
Between the upper and lower flanges of the beam and corresponding to the outer surface of the column, a plate-like stiffener extending in the vertical direction is arranged, and the stiffener extends in the thickness direction of the web of the beam and the flange. welded to the sides,
The closing plate is fixed to the stiffener in a state in which the end on the web side is inserted between the upper and lower flanges and is inserted into the side surface of the stiffener between the upper and lower flanges in the thickness direction of the stiffener near the intersection of the beams. and is fixed to the lateral sides of the webs and flanges of the beam in the thickness direction via the stiffeners thereof ,
Of the both side surfaces of the stiffener in the thickness direction, the portion of the closing plate inserted into the side surface near the intersection of the beams is provided at the end of the side surface in the thickness direction of the web so as to separate from the stiffener. A column-to-beam joint structure of a building, characterized in that it has a bent portion that is curved inward . Of the both side surfaces of the stiffener in the thickness direction, the portion of the closing plate inserted into the side surface near the intersection of the beams is provided at the end of the side surface in the thickness direction of the web so as to separate from the stiffener. 3. The column-to-beam joint structure of a building according to claim 1 or 2 , having a bent portion that is curved inward. Of the both side surfaces of the stiffener in the thickness direction of the closing plate, the portion inserted into the side surface near the intersection of the beams is fastened to the stiffener with bolts and nuts. 4. The beam-column joint structure of a building according to claim 3 , wherein a closing plate is fixed to said stiffener. The column-to-beam joint structure of a building according to any one of claims 1 to 5 , wherein the stiffener protrudes from the side surface of the web in the thickness direction to a greater extent than the flange.

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