JPH0254037A - Connection construction of column and beam - Google Patents

Abstract

PURPOSE:To enhance the transmission effect of stress by forming connection sections of weld hardwares to be buried in a reinforced concrete column in the shape of a lengthwise section. CONSTITUTION:Plane sections 3a are connected at right angles to connection sections 3b which are vertical against faces of the plane sections 3a and are formed in the shape of a lengthwise section of vertical in a reinforced concrete column 1 to form weld hardwares 3. The weld hardwares 3 are respectively connected to a flange of each steel framed beam 2 with bolts 4.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a column-beam joint structure in which a reinforced concrete column and a steel beam are joined using specially shaped hardware.

[Problem to be solved by the invention]

To join a steel beam to a reinforced concrete column, it is usually necessary to use joining hardware, but the joint needs to have a structure that does not interfere with the fluidity of poured concrete and the workability of reinforcement.

In response to this need, the applicant has proposed various joint structures using hardware in the form of cross-shaped battledore bolts, such as in Japanese Patent Application No. 128357/1983.

This joint structure straddles the column and beam with a metal fitting consisting of a flat plate part that is bolted to the beam and a connecting part that connects it.
The purpose of this invention is to mainly transmit force by using the adhesion strength of joints buried in reinforced concrete columns, but the present invention has been made based on the structure of this previously filed invention, and furthermore, the present invention has been made based on the structure of this previously applied invention, and has a joint that has a higher stress transmission effect. This is an attempt to propose a new structure.

[Means to solve the problem]

In the present invention, a connecting part that connects a flat plate part having a plurality of bolt holes orthogonally within a reinforced concrete column, which is bolted to the flange of each steel beam that is butted against a reinforced concrete column, is formed in a vertically elongated cross-sectional shape. This creates a mechanism in which the force from the beam is transmitted to the reinforced concrete column by the bearing stress acting on the joint in the direction perpendicular to the direction of action, thereby enhancing the stress transmission effect.

〔Example〕

The present invention will be explained below based on the drawings showing one embodiment.

In this invention, as shown in FIG. 1, a reinforced concrete column 1 and each steel beam 2 assembled on the reinforced concrete column 1 are simultaneously joined using joining hardware 3 orthogonal within the reinforced concrete column 1.

As shown in the figure, the joining hardware 3 includes a flat plate part 3a having a bolt hole 3c, which is joined to the flange of each steel beam 2 by a bolt 4, and a connecting part 3b which connects the flat plate part 3a orthogonally within the reinforced concrete column 1. As shown in Fig. 1-■, the connecting portion 3b has a vertically elongated cross-sectional shape perpendicular to the surface of the flat plate portion 3a, and the connecting portion 3b embedded in the reinforced concrete allows the main body to be The joint of the invention has a structure that transmits the force from the steel beam 2 to the reinforced concrete column 1.

In other words, the tensile or compressive force acting on the steel beam 2 is transmitted through the flat plate part 3a rigidly connected to the steel beam 2.
This acts as a bearing stress on the connecting portion 3b in the direction perpendicular to , and is transmitted to the reinforced concrete column 1 by this bearing stress.

FIG. 2 shows another manufacturing example of the joining hardware 3 in which the center part of the connecting part 3b is made thicker to reinforce it against axial force and bearing stress.

FIG. 3 shows the structural pattern of the joint. ■
is the basic type, and if reinforced concrete column l is a medium column,
■ is for a side column, ■ is for a corner column, and the joint hardware 3 is cross-shaped or cross-shaped depending on the location of the reinforced concrete column 1, respectively.
It is formed into T-shape and L-shape.

Figure 4 shows that the main reinforcement 1a of the reinforced concrete column l is connected to the connecting hardware 3.
This shows an example in which reinforcement is arranged to penetrate through the flat plate part 3a. In this case, the main reinforcement 1a is inserted into the hole 3d made in the flat plate part 3a for the insertion of the main reinforcement 1a, and the joining hardware is 3 can be incorporated into the column main reinforcement of one example of a reinforced concrete column and positioned.

The reinforced concrete column 1 and the steel beam 2 are integrated, if necessary, by bolting the web of the steel beam 2 to a joint plate 5 buried in the side surface of the reinforced concrete column 1, as shown in FIGS. 1 and 4. .

The reinforced concrete column 1 may be made of cast-in-place concrete or precast concrete.

〔Effect of the invention〕

This invention is as described above, and by making the connection part of the joint hardware buried in the reinforced concrete column have a vertically long cross-sectional shape, the force from the steel beam can be absorbed by the vertically long connection part in the direction orthogonal to the direction of its action. Since the structure is such that the stress is mainly transmitted to the concrete column as bearing stress, the stress transmission effect is high, and it is reliable and clear.

In addition, since the connecting parts are oriented vertically, the poured concrete has good fluidity and quality control is easy.

[Brief explanation of the drawing]

Figures 1-1 and II are a plan view and an elevation view, respectively, showing an embodiment of the present invention, and Figures 2-■ and ■ are a plan view and an elevation view, respectively, showing an example of manufacturing a metal joint. , FIGS. 3-2 to 3 are plan views showing an example of the structure of a joint, and FIGS. 4-T and II are a plan view and an elevation view, respectively, showing other embodiments. 1...Reinforced concrete column, 1a...Main reinforcement, 2...
・Steel beam, 3... Joining hardware, 3a... Flat plate part, 3b
... Connecting part, 3c... Bolt hole, 3d... Hole, 4
...Bolt, 5...Joining plate.

Claims (1)

[Claims] (1) Connecting hardware between a reinforced concrete column and a steel beam consists of a horizontal flat plate part that is bolted to the flange of the steel beam, and a connecting part that connects the flat plate part perpendicularly within the reinforced concrete column, spanning between the steel beams. This column-beam joint structure is characterized in that the connecting part of the joint metal fittings buried in the reinforced concrete column has a longitudinally elongated cross-sectional shape in the vertical direction.