JPH05125761A - Constructing method of composite structure - Google Patents

Abstract

PURPOSE:To construct a composite structure simply constituted of the composite structure of a reinforced concrete-constructed pole and a steel frame-constructed beam. CONSTITUTION:A steel frame-constructed beam 2 is welded at the front end of a plate column 1, thus forming a unit 3. A plate hoop 4 is welded to the plate column 1 in a panel zone. A cast-in-fitted column main reinforcement 7 is joined with an existing column main reinforcement 6. Steel frame- constructed beams 11 are stretched between the units 3, and the adjacent steel frame-constructed beams 2, 11 are joined by a gusset plate 12. A half PC floor member 13 is laid onto the steel frame-constructed beams 2, 11. Concrete 14 is place onto the half PC floor member 13 in the plate column 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a composite structure composed of reinforced concrete columns and steel beams.

[0002]

2. Description of the Related Art In the construction of a conventional composite structure of this type, a column main bar is erected on a foundation and a hoop line is fixed to the outer periphery thereof
A formwork is attached to the outer periphery of the column main bar with the hoop reinforcement, a steel frame beam is fixed to the upper part of the column main reinforcement, and the hoop reinforcement is installed in the panel zone which is the joint, and then in the formwork. It was done by pouring concrete.

[0003]

However, in such a construction method, a lot of labor and time are required for producing the formwork on site, which is an obstacle to streamlining the construction. Also,
There has been a problem that temporary materials such as supports that support the formwork hinder the safety of work.

On the other hand, in the panel zone, which is the joint between the steel-framed beam and the main reinforcement of the column, the connection is complicated and it is the most difficult place to rationalize the construction. For example, there is a problem that it is difficult to construct a hoop, which is a reinforcing bar of a column main reinforcement in a panel zone, and the construction becomes more difficult when there is a steel frame beam.

Further, concrete easily leaks from the joint between the steel frame beam and the column form, which is a weak point in the construction of this composite structure.

An object of the present invention is to provide a method for constructing a composite structure which can be constructed more easily than ever before.

[0007]

Means for Solving the Problems To explain the means of the present invention for achieving the above object, the present invention provides a method for constructing a composite structure comprising a reinforced concrete column and a steel frame beam, in which a steel plate is used. Make the pillar formwork into a box shape,
By using a unit composed of a plate column welded by replacing the required hoop muscle in the panel zone with a plate hoop and a steel frame beam welded and fixed to the tip of the plate column, The plate column of the unit is fitted and set on the outer periphery, another steel frame beam is spanned between the steel frame beams of the adjacent units, and a half PC flooring is laid on it. It is characterized in that concrete is poured into the plate column and above the half PC flooring to be integrated.

[0008]

By using a plate column in which hoop muscles are welded in the panel zone as described above, the plate column also serves as a mold, so that the work of forming the mold and the work of installing the hoop muscle on site can be omitted. .. Also, since this plate column becomes a part of the pillar, it is possible to increase the strength of the pillar,
Also, the work of removing the formwork becomes unnecessary.

Since the steel frame beam is welded and fixed to the plate column and a unit in which both are integrated is used, the structure of the connecting portion between the both can be simplified.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. In this embodiment, a plate column 1 is made of a steel plate as shown in FIG. 1, and a cross-shaped steel beam 2 is made as shown in FIG.

Next, as shown in FIG. 3, the plate column 1
A steel-framed beam 2 is welded to the tip of the unit to be integrated with each other to produce a unit 3. Further, as shown in FIG. 4, the plate hoop 4 is welded to the plate column 1 in the panel zone.

Next, as shown in FIGS. 5 and 10, another main column reinforcing bar 7 of the previous set is joined to a main column reinforcing bar 6 erected on the floor 5 by a mechanical joint 8. A hoop 9 is attached to the column main bar 7 in advance.

Next, as shown in FIG. 6, the unit 3 is lowered from the upper part of the column main bar 7 and the plate column 1 is set on the outer periphery of the column main bar 7, and the unit 3 is set by the diagonal support 10.
Is fixed on the floor 5.

Next, as shown in FIG. 7, FIG. 9 and FIG. 10, the steel beam 11 between the columns is set between the units 3 and joined by the gusset plate 12 or welded. Next, as shown in FIG. 7, a half PC floor member 13 is laid on the steel beam 11. Next, the upper end of the column main bar 7 is accurately fixed using a jig or the like.

Then, as shown in FIG. 8, the unit 3
Concrete 14 is placed in the plate column 1 of 1 to form reinforced concrete pillars 15, and concrete 14 is also placed on the half PC floor member 11 to form a composite floor 16, and the columns, beams, and floors are formed. Complete and complete the frame. After hardening the concrete 14, the support 10 is removed.

[0016]

Since the unit in which the steel frame beam is integrated into the plate column is used, the composite structure of the reinforced concrete column and the steel beam can be easily realized.

Since the column main bars are arranged in the plate column, there is a degree of freedom, and therefore the accuracy of the frame can be easily ensured.

Since the plate column in which the plate hoop is pre-welded in the panel zone which also serves as the mold is used, the productivity can be improved.

The plate column has a large restraining effect,
It is possible to improve the seismic performance of the body.

The plate column can be coated with a fireproof coating, and the fireproof performance can be secured.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a plate column used in the present invention.

FIG. 2 is a plan view showing an example of a steel frame beam used in the present invention.

FIG. 3 is a plan view showing a state in which a steel frame beam is joined to a plate column to form a unit.

FIG. 4 is a plan view showing a state in which a plate hoop is welded to a unit.

FIG. 5 is a side view showing a step of connecting pillar main bars.

FIG. 6 is a vertical cross-sectional view showing a step of setting a unit on a column main bar.

FIG. 7 is a vertical cross-sectional view showing a step of laying a half-PC floor member by spanning a steel frame beam between the set units.

FIG. 8 is a vertical sectional view showing a step of placing concrete in the unit and on the half PC floor member.

FIG. 9 is a plan view showing a state in which a steel beam is bridged between adjacent units.

10 is a vertical cross-sectional view of FIG.

[Explanation of symbols]

 1 Plate Column 2 Steel Beam 3 Unit 4 Plate Hoop 5 Floor 6, 7 Column Main Bar 8 Mechanical Joint 9 Hoop 10 Diagonal Support 11 Steel Beam 12 Gusset Plate 13 Half PC Floor Member 14 Concrete 15 Reinforced Concrete Column 16 Composite Floor

Claims (1)

[Claims] 1. A method of constructing a composite structure comprising a reinforced concrete column and a steel frame beam, wherein the column frame is made of a steel plate in a box shape, and the required hoop reinforcement in the panel zone is plate-formed. A unit composed of a plate column welded in place of a hoop and a steel frame beam welded and fixed to the tip of the hoop is used, and the plate column of the unit is fitted to the outer periphery of a column main bar erected at a predetermined position. Set together, span another steel-framed beam between the steel-framed beams of the adjoining units, and lay a half-PC flooring on it, and then, in the plate column and the half-PC flooring A method for constructing a composite structure, comprising placing concrete on the top and integrating the concrete.