JPS62121250A - Pillar/beam connection structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] This invention relates to a frame structure joint structure having extremely high seismic performance.

[Prior art]

There are concrete-filled steel pipe columns, which are cylindrical or rectangular steel pipes filled with concrete.

It is known that such concrete-filled steel pipe columns have high seismic performance. The outer steel pipe part is Conc I7
− In order to suppress the volume change of the column and make it difficult to cause shear failure or crushing, it is stronger
This is because the stickiness (toughness) increases.

In order to connect a beam to such a concrete-filled steel pipe column, a structure is adopted in which a steel beam is connected to the middle part of the steel pipe column, or the beam is made of reinforced concrete and the reinforcing bars are passed through the steel pipe concrete column.

However, with either of these configurations, problems remain in terms of stress flow and economic efficiency.

[Means for solving problems]

The joint structure of columns and beams according to the present invention is to construct columns and beams by arranging beam reinforcements on an erected steel pipe, pouring concrete into the steel pipe and beam formwork, and then placing them again on the beams. Steel pipes are installed vertically.

In other words, the steel pipe columns are separated above and below the beam, and the beam is made of reinforced concrete, which is integrated with the concrete inside the steel pipe column. Therefore, the flow of stress from the columns to the beams is improved, and there is no need to use special materials or construction work for joining, making construction possible economically.

〔Example〕

The present invention will be described in detail below based on an embodiment shown in the drawings.

Build the foundation and underground beam 1. First floor floor 2 will be formed by pouring concrete. The column reinforcing bars 3 whose lower part is buried in the foundation 1 are made to protrude above the first floor floor 2 (Fig. 2).2 The column reinforcing bars 3 are inserted inside and the steel pipes 4 are erected above the first floor floor 2.Steel pipes 4 may be cylindrical or rectangular (Fig. 6).

Beam reinforcing bars 5 and column reinforcing bars 6 are arranged on the steel pipe 4. Column reinforcement 6
protrudes above and below the beam reinforcement 5, and the lower part is inserted into the steel pipe 4 described above. A formwork 7 is assembled around the beam reinforcing bars 5. 8 is a temporary support beam that supports the formwork 7 (Fig. 4).

Concrete 9 is poured into the steel pipe 4 and beam formwork 7 (Fig. 5).

After constructing the second floor floor 10, the column reinforcing bars 3 protruding above the floor 10
is inserted inside and the steel pipe 4 is erected.

Then repeat the above operations.

This invention has the above configuration, but the column reinforcing bars 6 are the parts necessary for integration with the steel pipe concrete (the upper and lower parts of the column).
It is also possible to place it on the chisel and leave it unlined in the middle.

〔Effect of the invention〕

This invention has the above configuration, and beam reinforcing bars are arranged on a steel pipe, and concrete is poured into the steel pipe and the beam formwork. Therefore, the concrete inside the steel pipe and the concrete inside the beam formwork are continuously integrated, resulting in better stress flow and greater earthquake resistance.

In addition, the columns are made of steel pipes, and the beams are cast in concrete using beam formwork, as in the past, so the materials and construction that connect the steel pipe columns and beams are on the lower layer, making it economically cheaper.

[Brief explanation of drawings]

Figure 1 is a longitudinal sectional view of an embodiment of the present invention, and Figures 2 to 5 are
The figure is a longitudinal sectional view of the construction sequence. 1...Foundation, underground beam, 3...Column reinforcement,
4... Steel pipe, 5... Beam reinforcing bar, 6...
...Column reinforcement, 7...Formwork, 9...Concrete. 1st blade

Claims (1)

[Claims] Arrange beam reinforcement and connection reinforcement with the column on the erected steel pipe, pour concrete into the steel pipe and beam formwork to construct the column and beam, erect the steel pipe on the beam, and do the same. A joint structure of columns and beams that is characterized by being built continuously.