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JP-7856496-B2 - Column beam joint structure

JP7856496B2JP 7856496 B2JP7856496 B2JP 7856496B2JP-7856496-B2

Inventors

  • 澤口 香織

Assignees

  • 清水建設株式会社

Dates

Publication Date
20260511
Application Date
20220609

Claims (4)

  1. A concrete-filled steel pipe structure in which concrete is filled inside the steel pipe, a column-beam joint structure at the joint between the outer columns arranged along the outer perimeter of the building and the H-shaped steel beams joined to the upper ends of the outer columns, The beam is provided with a reinforcing plate on the end face located on the outer perimeter side of the building, The reinforcing plate is joined to the end face of the upper flange of the beam, the end face of the web, and the end face of the lower flange. The steel pipe comprises a steel pipe body positioned below the beam and a cover plate positioned at the same height as the beam. The reinforcing plate is located on the outer periphery side of the blocking plate and is joined to the end face of the beam located on the outer periphery side of the building in the beam, forming a column-beam joint structure.
  2. The column-beam joint structure according to claim 1, wherein the reinforcing plate is welded to the end face of the upper flange, the end face of the web, and the end face of the lower flange.
  3. The column-beam joint structure according to claim 1 or 2, wherein the width of the reinforcing plate is 1/2 or more of the width of the beam.
  4. The column-beam joint structure according to claim 1 or 2, wherein the thickness of the reinforcing plate is equal to or greater than the thickness of the web.

Description

This invention relates to a column-beam joint structure. Conventionally, the RCST (Reinforced Concrete Steel Tube) structure, which combines CFT (Concrete-Filled Steel Tube) columns and S (Steel Frame) beams, has been known (see Patent Document 1 below). In the RCST structure, the upper and lower column steel tubes are not welded together; instead, the main reinforcement bars are placed inside the column steel tubes, and then concrete is poured to join the upper and lower floors. This anchors the main reinforcement bars to the concrete. On the top floor, the main reinforcement bars of the columns are either bent inside the column and anchored to the concrete, or mechanically anchored to the top of the column. Furthermore, in beam-penetrating connections, on the side of the column-beam joint where the beam is not connected, the beam may protrude approximately 50 mm from the column face (outer surface of the column). Japanese Patent Publication No. 2021-191920 This is a top view showing a column-beam joint structure according to one embodiment of the present invention.This is a vertical cross-sectional view showing a column-beam joint structure according to one embodiment of the present invention. A column-beam joint structure according to one embodiment of the present invention will be described with reference to the drawings. Figure 1 is a top view showing a column-beam joint structure according to one embodiment of the present invention. Figure 2 is a vertical cross-sectional view showing a column-beam joint structure according to one embodiment of the present invention. In Figure 1, the outer column 2 is shown in a horizontal cross-section. As shown in Figure 1, the column-beam joint structure 1 of this embodiment is a structure of the joint 10 between the upper end (highest point) of the outer column 2, which is arranged along the outer perimeter A of the building, and the beam 3. The column-beam joint structure 1 is equipped with a reinforcing plate 4. Let the direction along the horizontal axis be defined as the X direction. Let the other direction perpendicular to this horizontal axis be defined as the Y direction. At the joint 10, beams 3 are joined to the outer column 2 on both sides in the Y direction, and beam 3 is also joined to one side in the X direction (right side in Figure 1). The other side in the X direction (left side in Figure 1) is located on the outer perimeter A of the building. The joint 10 is configured such that beam 3 penetrates the interior of the outer column 2. The outer column 2 is a concrete-filled steel pipe structure, with concrete filled inside a steel pipe 21. The outer column 2 comprises a steel pipe 21, multiple main reinforcement bars 22, and a concrete section 23. The steel pipe 21 is formed in a cylindrical shape with the vertical direction as its axis. As shown in Figure 2, the steel pipe 21 has a steel pipe body 21b positioned below the beam 3 and a closing plate 21c positioned at the same height as the beam 3. As shown in Figure 1, the main reinforcement bars 22 are arranged along the inside of the steel pipe 21. The main reinforcement bars 22 are spaced apart in the circumferential direction. The main reinforcement bars 22 extend vertically. The number of main reinforcement bars 22 can be set as appropriate. The concrete section 23 is filled inside the steel pipe 21. The main reinforcement bars 22 are anchored to the concrete section 23. Beam 3 is constructed from H-shaped steel. As shown in Figure 2, beam 3 has an upper flange 31, a lower flange 32, and a web 33. The upper flange 31 and the lower flange 32 are spaced apart in the vertical direction. Both the upper flange 31 and the lower flange 32 are formed in a plate shape. The plate surfaces of the upper flange 31 and the lower flange 32 are oriented in the vertical direction. The web 33 connects the upper flange 31 and the lower flange 32. The web 33 is formed in a plate shape. The plate surface of the web 33 is oriented horizontally. In this embodiment, a beam 3 extending in the Y direction (referred to as "beam 3B") is joined to both sides of the beam 3 extending in the X direction (referred to as "beam 3A"). Alternatively, beam 3B may be joined to both sides of beam 3A in the Y direction. At the joint 10, the slab 5 is installed above the beam 3. The upper ends of the main reinforcement bars 22 are anchored to the concrete of the slab 5 via mechanical connectors 25. Alternatively, the upper ends of the main reinforcement bars 22 may be bent and anchored to the concrete without using the mechanical connectors 2, and the method of anchoring the upper ends of the main reinforcement bars 22 can be set as appropriate. At the joint 10, the end face 3a of the beam 3A is located on the outer perimeter A side of the building, and the end face 3a facing the outer perimeter A protrudes slightly toward the outer perimeter A side than the closing plate 21c of the outer column 2. The reinforcing plate 4 is joined to th