JP2022094845A - Column beam joint structure - Google Patents

Abstract

To improve the joining strength of a beam member to a column member.SOLUTION: A column beam joint structure 10 comprises: a column member 12 constituted of a steel pipe; copper bracket members 14 joined to a column surface 20 of the column member 12; copper beam members 16 having end surfaces facing the end surfaces of the bracket members 14; joining plates 18 that are stacked on adjacent bracket members 14 and adjacent beam members 16 to join the adjacent bracket members 14 and adjacent beam members 16; and connection plates 100 stacked on ends 18T of adjacent connection plates 18 and bolt-fastened together with the joining plates 18 to the bracket members 14 and the beam members 16.SELECTED DRAWING: Figure 1

Description

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

Patent Document 1 discloses a technique relating to the structure of a column-beam joint in a building in which a steel beam is joined to a peripheral side wall surface of a steel pipe column via an outer diaphragm. In this prior art, the outer diaphragm is shaped to be arranged from the outside across the adjacent beams, the notch side is fixed to the steel pipe column, and the side edge side is along with the side edges of the other adjacent outer diaphragms. The steel pipe column and the beam are connected by arranging them facing the flange of the beam and fixing them with splice plates and high tension bolts.

In Patent Document 2, a column or pile made of a circular or square steel pipe and an H-shaped cross-section steel beam are combined with two or a plurality of split joining members having a split ring and a split diaphragm to fit the outer shape of the column cross section. A technique relating to a joining structure for joining with a joining member arranged in the above is disclosed. In this prior art, a ring is formed by bolt-joining a split diaphragm and a flange of an H-shaped cross-section steel beam, and a joining member in which each split joining member is integrated is formed, and the column is formed through the joining member. Join H-shaped cross-section steel beams.

Patent Document 3 discloses a technique relating to a column-beam joining structure for joining a steel beam to a steel column. In this prior art, a steel column member having orthogonal column faces, a pair of steel bracket members with fillet welds to each of the orthogonal column faces, and a pair of steel bracket members, respectively. A pair of steel beam members arranged so that the end faces face each other, a pair of steel bracket members arranged on the outer periphery of the column member, and a joining plate connecting the pair of steel beam members. Have.

Japanese Patent Application Laid-Open No. 2003-027590 Japanese Unexamined Patent Publication No. 2004-116080 Japanese Unexamined Patent Publication No. 2018-071147

In a beam-column joint structure in which an adjacent bracket member joined to a column member and an adjacent beam member are joined by a joining plate, stress is not transmitted between the beam members joined to different joining plates, so that the column of the beam member There is room for improvement from the viewpoint of improving the bonding strength to the members.

In view of the above facts, an object of the present invention is to improve the joining strength of a beam member to a column member.

The first aspect is a column member made of a steel pipe, a steel bracket member joined to the column surface of the column member, and a steel beam member whose end faces are arranged facing each other on the end faces of the bracket members. And, it is arranged so as to be overlapped with the adjacent bracket member and the adjacent beam member, and is arranged so as to be overlapped with the joining plate for joining the adjacent bracket member and the adjacent beam member and the end portion of the adjacent joining plate. , A column-beam joint structure including the bracket member and a connection plate bolted to the beam member together with the joint plate.

In the column-beam joining structure of the first aspect, the steel beam member is joined to the steel column member by bolting the bracket member welded to the column surface of the column member and the beam member with a joining plate and a connecting plate. can do. Since the joint plate is integrated by the connection plate, the bending stress generated in the beam member flows to the other beam member via the joint plate and the connection plate. Further, since the bolt fastening portion becomes three-sided shearing, it is possible to delay the shear concentration on the bolt, particularly the bolt farthest from the column surface, and the yield and yield strength of the bolt are increased. Therefore, the joining strength of the beam member is improved.

The second aspect is a column member made of a steel pipe, a steel bracket member joined to the column surface of the column member, and a steel beam member whose end faces are arranged facing each other on the end faces of the bracket members. A column-beam joint comprising the bracket member and a joint plate in which the ends thereof are overlapped with each other and bolted to the bracket member and the beam member. It is a structure.

In the beam-column joining structure of the second aspect, the steel beam member can be joined to the steel column member by bolting the bracket member welded to the column surface of the column member and the beam member with a joining plate. can.

Since the ends of the joint plate are overlapped and bolted together to be integrated, the bending stress generated in the beam member flows to the other beam member via the joint plate. Further, since the bolt fastening portion becomes three-sided shearing, it is possible to delay the shear concentration on the bolt, particularly the bolt farthest from the column surface, and the yield and yield strength of the bolt are increased. Therefore, the joining strength of the beam member is improved.

In the third aspect, the bracket member and the beam member are made of H-shaped steel, the joining plate is arranged above and below the flange of the bracket member and the beam member, and the upper and lower joining plates are intermediate portions. The beam-column joint structure according to claim 1 or 2, which is bolted together.

In the beam-column joint structure of the third aspect, the upper and lower joint plates are bolted and integrated at the intermediate portion, so that buckling of the joint plates is suppressed.

According to the present invention, it is possible to improve the joining strength of the beam member to the column member.

It is a perspective view which shows the column-beam joint structure of 1st Embodiment. It is a front view which shows the column-beam joint structure of 1st Embodiment. It is a top view which shows the column-beam joint structure of 1st Embodiment. It is sectional drawing of the intermediate part of the joint plate of the column beam structure of 1st Embodiment. It is a front view which shows the bracket member joined to the column surface of the column member of the column beam structure of 1st Embodiment. It is a perspective view which shows the construction procedure of the column-beam joint structure of 1st Embodiment. It is a perspective view which shows the construction procedure of the column-beam joint structure of 1st Embodiment. It is a perspective view which shows the construction procedure of the column-beam joint structure of 1st Embodiment. It is a perspective view which shows the construction procedure of the column-beam joint structure of 1st Embodiment. It is a top view corresponding to FIG. 3 which shows the modification of the joint plate of the bridge structure of 1st Embodiment. It is a top view corresponding to FIG. 3 which shows the column-beam joint structure of 2nd Embodiment. It is a front view corresponding to FIG. 2 which shows the column-beam joint structure of 2nd Embodiment. It is a top view for demonstrating the flow of stress.

<First Embodiment>
The column-beam structure of the first embodiment of the present invention will be described. It should be noted that the arrows X and Y appropriately shown in each figure indicate two orthogonal directions in the horizontal direction, and the arrows Z indicate the vertical direction.

[structure]
First, a specific structure of the column-beam joint structure according to the first embodiment will be described.

As shown in FIGS. 1 to 3, the column-beam joining structure 10 of the present embodiment in which the beam member 16 is joined to the column member 12 includes a column member 12, a bracket member 14, a beam member 16, and a joining plate 18. , And a connection plate 100.

The column member 12 is made of a square steel pipe made of steel and includes four column surfaces 20 orthogonal to each other. Further, the bracket member 14 and the beam member 16 are made of H-shaped steel made of steel. The bracket member 14 is joined to the column surface 20 of the column member 12 by fillet welding. The fillet welded portions are the fillet welded portions 22 and 24 (see FIG. 4). Further, the bracket member 14 may be joined to the column surface 20 by a welding method other than fillet welding.

As shown in FIG. 2, in the beam member 16, the end surface 16T is arranged so as to face the end surface 14T of the bracket member 14. In this embodiment, the end face 16T and the end face 14T are in close proximity to each other or in contact with each other.

The web 14W of the bracket member 14 and the web 16W of the beam member 16 in which the end face 16T and the end face 14T (see FIG. 2) are arranged so as to face each other are bolted by bolts 28 and nuts 30 using a splice plate 26. It has been concluded.

As shown in FIGS. 1 to 3, the upper and lower flanges 14F of the adjacent bracket members 14 (see FIGS. 2 and 3) and the upper and lower flanges 16F of the beam member 16 have a substantially triangular shape (FIG. 2). 1 and the end portion 18T of the steel joint plate 18 (see FIG. 3) are arranged so as to overlap each other. The joining plate 18 is arranged along the outer periphery of the pillar member 12, and in the present embodiment, along the corner portion of the pillar member 12 in a plan view.

The connection plate 100 is superposed on the end portion 18T of the adjacent joint plate 18 superposed on the upper flange 14F of the bracket member 14 and the upper flange 16F of the beam member 16. Then, the end 18T of the adjacent joint plates 18 stacked above and below the upper flanges 14F and 16F and the connection plate 100 are connected to the upper flange of the bracket member 14 by the bolt 28 and the nut 30 (see FIG. 2). It is bolted to the flange 16F on the upper side of the 14F and the beam member 16.

Similarly, the connection plate 100 is stacked under the end 18T of the adjacent joint plate 18 stacked under the lower flange 14F of the bracket member 14 and the lower flange 16F of the beam member 16. .. Then, the end 18T of the adjacent joint plates 18 stacked above and below the lower flanges 14F and 16F and the connection plate 100 are connected to the lower side of the bracket member 14 by the bolt 28 and the nut 30 (see FIG. 2). It is bolted to the flange 14F of the above and the lower flange 16F of the beam member 16.

Of the bolts 28 for fastening the flange 16F of the beam member 16, the bolt 28 farthest from the column surface 20 is referred to as the first bolt 28P.

As shown in FIGS. 1 and 3, the circumferential intermediate portion 18C of the joint plate 18 stacked above and below the upper and lower flanges 14F of the bracket member 14 and the upper and lower flanges 16F of the beam member 16 is as shown in FIG. It is fastened with a bolt 28 and a nut 30 for preventing the opening. The filler 90 is sandwiched between the intermediate portions 18C of the upper and lower joining plates 18.

[Construction method]
Next, an example of a construction method for joining the beam member 16 to the column member 12 will be described.

As shown in FIGS. 5 and 6, the pillar member 12 is built in a predetermined position. The bracket member 14 is previously joined to the column surface 20 of the column member 12 by fillet welding at the factory. The bracket member 14 may be joined to the pillar member 12 at the processing yard at the site, or may be welded to the pillar member 12 after the pillar member 12 is built.

Next, as shown in FIGS. 7 and 8, the end face 14T of the bracket member 14 (see FIG. 2) and the end face 16T of the beam member 16 (see FIG. 2) face each other, and in the present embodiment, the beam is close to or in contact with each other. After arranging the member 16, the beam member 16 is joined to the bracket member 14 by bolting the web 14W of the bracket member 14 and the web 16W of the beam member 16 using the splice plate 26.

Next, as shown in FIG. 9, the adjacent bracket members 14, the beam members 16 joined to the bracket members 14, the joining plate 18, and the connecting plate 100 are bolted together with bolts 28 and nuts 30. ..

[Action and effect]
Next, the operation and effect of this embodiment will be described.

In the column-beam joint structure 10 of the present embodiment, the bracket member 14 welded to the column surface 20 of the column member 12 and the beam member 16 are bolted to the joint plate 18 and the connection plate 100 to bolt the column member made of steel. A steel beam member 16 can be joined to 12.

Further, since the adjacent joint plates 18 are integrated by the connection plate 100, the bending stress generated in the beam member 16 flows to the other beam members 16 via the joint plate 18 and the connection plate 100.

For example, as shown in FIG. 13, one of the opposing beam member 16 (the beam member 16 shown above in the figure) and the other beam member 16 (the beam member 16 shown below shown in the figure). The bending stress acting on the beam member 16 flows to the other beam member 16 as shown by the arrow F.

Further, the bolt fastening portion becomes a three-sided shearing of the connection plate 100, the joining plate 18, and the flange 14F or the flange 16F, so that the shear concentration is concentrated on the bolt 28, particularly the first bolt 28P farthest from the column surface 20. Can be delayed and the yield and yield strength of the first bolt 28P is increased.

Therefore, the joining strength of the beam member 16 to the column member 12 is improved.

Further, since the upper and lower joint plates 18 of the flanges 14F and 16F are bolted and integrated at the intermediate portion 18C, buckling of the joint plate 18 is suppressed.

[Modification example]
Next, a modified example of the connection plate will be described.

As shown in FIG. 10, the connection plate 101 is composed of two pieces, a first connection plate 110 and a second connection plate 112. The first connection plate 110 is provided at a position far from the pillar surface 20, and the second connection plate 112 is provided at a position close to the pillar surface 20.

In this modification, as described above, the connection plate 101 is composed of two pieces, the first connection plate 110 and the second connection plate 112, but the connection plate 101 is not limited to this. The connection plate may be composed of three or more.

<Second embodiment>
The column-beam structure of the second embodiment of the present invention will be described. The same members as those in the first embodiment are designated by the same reference numerals, and duplicate description will be omitted or simplified.

[structure]
First, a specific structure of the column-beam joint structure according to the second embodiment will be described.

As shown in FIG. 11, the column-beam joint structure 200 of the present embodiment includes a column member 12, a bracket member 14, a beam member 16, a joint plate 18, and a joint plate 180. There is.

As shown in FIGS. 11 and 12, under each of the upper flange 14F of the adjacent bracket member 14 and the upper flange 16F of the beam member 16, the end portion of the steel joint plate 18 having a substantially triangular shape is formed. 18Ts are arranged one on top of the other.

As shown in FIG. 12, similarly, on each of the lower flange 14F of the bracket member 14 and the lower flange 16F of the beam member 16 adjacent to each other, the end of the substantially triangular steel joint plate 18 is placed. The portions 18T are arranged so as to overlap each other.

As shown in FIGS. 11 and 12, an end portion of a substantially triangular steel joint plate 180 is placed on each of the upper flange 14F of the adjacent bracket member 14 and the upper flange 16F of the beam member 16. 180Ts are arranged one on top of the other. Further, the end portions 180T of the adjacent joining plates 180 are vertically overlapped with each other.

As shown in FIG. 12, similarly, under each of the lower flange 14F of the bracket member 14 and the lower flange 16F of the beam member 16 adjacent to each other, the end of the substantially triangular steel joint plate 180 is formed. The portions 180T are arranged so as to overlap each other. Further, the end portions 180T of the adjacent joining plates 180 are vertically overlapped with each other.

Then, the end 18T of the adjacent joint plate 18 and the end 180T of the joint plate 180 superposed on the flanges 14F and 16F are attached to the flange 14F of the bracket member 14 and the flange 16F of the beam member 16 by the bolt 28 and the nut 30. It is bolted.

[Action and effect]
Next, the operation and effect of this embodiment will be described.

In the column-beam joint structure 10 of the present embodiment, the bracket member 14 welded to the column surface 20 of the column member 12 and the beam member 16 are bolted to the joint plate 18 and the joint plate 180 to bolt the column member made of steel. A steel beam member 16 can be joined to 12.

Further, since the adjacent joint plates 180 are integrated by overlapping the end portions 180T with each other and bolting them together, the bending stress generated in the beam member 16 flows to the other beam member 16 via the joint plate 180.

Further, the bolt fastening portion is shear-concentrated on the bolt 28, particularly the first bolt 28P farthest from the column surface 20, by forming a three-sided shearing of the joint plate 180, the joint plate 18, and the flange 14F or the flange 16F. Can be delayed and the yield and yield strength of the first bolt 28P is increased.

Therefore, the joining strength of the beam member 16 to the column member 12 is improved.

Further, since the upper and lower joint plates 18 of the flanges 14F and 16F are bolted and integrated at the intermediate portion 18C, buckling of the joint plate 18 is suppressed.

<Others>
The present invention is not limited to the above embodiment.

For example, in the above embodiment, the bracket member 14 and the beam member 16 are made of H-shaped steel made of steel, but the present invention is not limited thereto. The bracket member 14 and the beam member 16 may be steel members, and may be made of, for example, a square steel pipe.

Further, in the above embodiment, when a step or a gap is formed, a filler or the like may be appropriately used.

Further, it can be carried out in various embodiments without departing from the gist of the present invention. A plurality of embodiments, modifications, and the like can be combined and implemented as appropriate.

10 Column-beam joint structure 12 Column member 14 Bracket member 14T End surface 16 Beam member 16T End surface 18 Joint plate 18C Intermediate part 18T End part 20 Column surface 100 Connection plate 101 Connection plate 110 First connection plate 112 Second connection plate 180 Joint plate 180T End 200 column-beam joint structure

Claims (3)

Column members made of steel pipes and
A steel bracket member joined to the pillar surface of the pillar member,
A steel beam member whose end face faces the end face of the bracket member and
A joining plate that is placed on top of the adjacent bracket member and the adjacent beam member and joins the adjacent bracket member and the adjacent beam member.
A connection plate that is placed on top of the end of the adjacent joint plate and bolted to the bracket member and the beam member together with the joint plate.
Column-beam joint structure with. Column members made of steel pipes and
A steel bracket member joined to the pillar surface of the pillar member,
A steel beam member whose end face faces the end face of the bracket member and
A joining plate that is placed on top of the adjacent bracket member and the adjacent beam member and whose ends are overlapped and bolted to the bracket member and the beam member.
Column-beam joint structure with. The bracket member and the beam member are made of H-shaped steel.
The joint plate is arranged above and below the flanges of the bracket member and the beam member.
The upper and lower joint plates are bolted at the middle portion.
The column-beam joint structure according to claim 1 or 2.

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