JPH03275832A - Joint construction of column and beam - Google Patents

Abstract

PURPOSE:To promote execution efficiency by mounting a cross unit beam placing a column hoop positioned to main beam reinforcing bars, auxiliary reinforcing bars and a column and beam joining section in advance to the head of a reinforced concrete column placing concrete to the bottom of the beam. CONSTITUTION:Concrete for a reinforced concrete column A is placed to the bottom of a beam, and H shape-steel beams 2 planting stud bolts 1 on a flange are assembled in a cross shape. Main beam reinforcing bars 3 and auxiliary reinforcing bars 4 are placed to up and down faces of the H-shape steel beams 2 and the peripheral surface and, at the same time, a column hoop is placed between webs of the H-shape steel beams 2 to assemble a cross steel framed reinforcing unit beam B. After that, the unit beam B is mounted on the head of the reinforced concrete column A to which main column reinforcing bars 6 are projected upward, and it is connected to an intermediate H-shape steel beam 8. According to the constitution, work can be greatly simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a column-beam joint construction method in a structure consisting of reinforced concrete columns and steel beams.

(Prior art) As a conventional construction method of this type, as shown in Japanese Patent Application Laid-Open No. 50-179946, as shown in Japanese Patent Application Laid-Open No. 50-179946, humanoid reinforcements were fixed at the ends. A construction method has been proposed in which a steel beam is supported so that the thick reinforcing bars are located between the column main reinforcement and the stirrup reinforcement, and in this state, the column formwork is assembled and concrete is poured.

(Problems to be Solved by the Invention) In the conventional construction method described above, the reinforcement arrangement at the joints of columns and beams is complicated, and the ends of the steel beams on which dowel reinforcements are placed are difficult to fit in before concrete is poured. In general, in structures consisting of reinforced concrete columns and steel beams, which are complex and difficult to support the weight of the steel beams, when stress is transferred between the steel beams and reinforced concrete columns, Due to lack of rigidity, 1. Steel beams are easily deformed, and as the steel beams deform, the concrete is likely to be damaged at the contact surface between the ends and the concrete, and due to local stress concentration, the steel beams are easily deformed. Column concrete at beam intersections is easily damaged.

The present invention was proposed to solve these problems, and its purpose is to construct a capital section of highly rigid steel-framed reinforced concrete, so that stress can be transmitted smoothly and construction can be streamlined. The purpose of this invention is to provide a shikiguchi construction method for columns and beams.

(Means for Solving the Problems) In order to accomplish the above-mentioned object, according to the column and beam joint construction method according to the present invention, in a structure consisting of reinforced concrete columns and steel beams, the Concrete is poured, and then the beam steel is assembled in a cross shape, and the beam main reinforcement, auxiliary reinforcement, and column reinforcement located within the column-beam joint are reinforced to create a cross-shaped steel reinforcement unit beam. The pillars are placed on top of each other, the beams of adjacent units are connected by intermediate steel beams, and concrete is poured into the column heads to construct a capital section of steel-framed reinforced concrete.

(Function) As described above, in the present invention, concrete is poured into the reinforced concrete column up to the bottom of the beam, and with the main bar projecting upward, a cross-shaped structure is formed in which the steel frame at the center of the column-beam joint is continuous. A cross-shaped steel reinforcing bar unit, which is assembled by pre-arranging the beam main reinforcement, auxiliary reinforcement, and column bar reinforcement located at the column-beam joint, is placed on the column head, and the beams of the same unit are connected between adjacent beams. They are connected by intermediate steel beams, and concrete is poured into the same unit beam at the column head to construct a highly rigid steel reinforced concrete capital section.

Therefore, the reinforced concrete IJ-to column and the steel beam are integrally joined via the highly rigid steel-framed reinforced concrete capital portion, and stress transmission between the column and beam is ensured, and deformation of the edge portion is suppressed. At the same time, the yield point of the entire structure can be clearly located in the bare steel beams that are far away from the concrete, and the combination of the highly rigid concrete parts, which will not be easily damaged, and the steel beams, which are soft and deformable, reduces the elasticity. It is possible to assemble a certain frame.

(Example) The present invention will be explained below with reference to illustrated embodiments.

Reinforced concrete - 1 - Concrete for column (4) is poured to the bottom of the beam (see Figure 1), and then H-shaped beam (2) with stud bolts (1) or steel reinforcement installed on the flange.
The beam main reinforcements (3) and sub-reinforcements (4) are arranged on the upper and lower surfaces and outer periphery of each H-shaped steel beam (2), and the adjacent H-shaped steel beams (2) in the panel zone are assembled in a cross shape. ), and assemble the cross-shaped steel reinforcement unit beam IBL by arranging column reinforcement (5) between the webs of the same unit - ((8)
, the reinforced concrete with the column main reinforcement (6) protruding upward. In FIG. 7, (7) is the attachment piece of the beam main reinforcement (3) attached to the H-shaped steel beam (2).

Next, the H-shaped steel beam (2) in the unit ((3)) disposed on each column capital is connected by welding or bolts to an intermediate H-shaped steel beam (8) having stud bolts (1) planted on the flanges. (See Figure 3) Next, install the formwork (9) for the column and beam joints, and install the floor formwork. (See Figure 4) Next, install the concrete for the joints (10) and the floor. Concrete (11) is poured (see Figure 5), and through the thus constructed highly rigid capital part (12),
Join the columns and beams together. (See Figures 6 and 7) As described above, according to the embodiment, the reinforced concrete column (
Concrete from 4) was poured to the bottom of the beam, and a steel reinforcing bar unit assembled in a cross shape was placed in the center of the column head of the company (4).
It is a simple process of setting Bl, bolting or welding the units (3) together via the intermediate steel beam (8), and then pouring cast-in-place concrete for the floor etc., and the work is repeated. It can be significantly simplified.

Further, according to the present invention, by mounting a cross-shaped steel reinforcing unit ([31] at the center of the column head of the reinforced concrete column □, the same unit (8) can be easily set to the column without requiring support. can be done.

Furthermore, by placing reinforcement in advance at the factory or on-site, it is possible to create a single joint with high precision and high quality.
Concrete is poured to construct a highly rigid steel reinforced concrete capital part (12) at the column head, and the column (4) and unit beam (Bl) are integrally connected by the capital part (12), We aimed for rational stress transmission between the columns and beams, and not only ensured that stress was transmitted to the reinforced concrete column (4) through the continuous cross-shaped steel beams, but also suppressed the deformation of the steel frame inside the concrete, and One part of the concrete sheared surface is thickened to prevent any damage to this part, and also to prevent the concrete from peeling off at the end of the steel beam when stress is transmitted.

(Effects of the Invention) According to the present invention, beam steel frames are assembled in a cross shape on the head of a reinforced concrete column in which concrete has been cast to the bottom of the beam, and beam main reinforcements and cost reinforcements are attached to the column-beam joint. By mounting a cross-shaped steel reinforcing bar unit beam made of pre-arranged column reinforcement, the steel beam can be easily set on the column without the need for support.
The complex reinforcement arrangement in the capital section can be simplified into a cross-shaped unit that can be constructed in advance at the factory or on-site, contributing to significant streamlining of construction and improved quality. .

Furthermore, by connecting the adjacent cross-shaped steel reinforced unit beams with intermediate steel beams and pouring concrete into the unit beams at the column head, a highly rigid steel reinforced concrete capital portion is constructed at the column head. This is a highly safe construction method that ensures smooth transmission of stress between the columns and beams through the capital section, and also significantly simplifies the work. Moreover, in the unit beam, the steel frame at the center of the column-beam joint is formed into a continuous cross shape.
Stress transmission is carried out more smoothly and workability is improved.

[Brief explanation of the drawing]

Figures 1 to 5121 are side views showing the steps of an embodiment of the column-beam joint construction method according to the present invention, and Figure 6 shows the joint section of the pillar-beam constructed by the pillar-beam joint construction method. Perspective view, No. 7
The figure is a perspective view of a cross-shaped steel reinforcement unit beam. Prisoner...Reinforced concrete column, (B)...Cross-shaped steel reinforced unit beam, (2)...
H-type steel beam, (3)...beam main reinforcement, (4)...
・costal muscles, (5)...columnar muscles, (6)・
... Company main line, (8) ... Intermediate beam, (
10)...Column and beam joint section concrete, (12)...
Capital Department.

Claims (1)

[Claims] In a structure consisting of reinforced concrete columns and steel beams, concrete is poured to the bottom of the reinforced concrete columns, and then the beam steel frames are assembled in a cross shape, and the beam main and auxiliary reinforcement bars as well as the inside of the column-beam joint are placed on the beam steel frames. A cross-shaped steel reinforced concrete unit beam made by arranging column bars located at the top of the column is placed on top, adjacent unit beams are connected by an intermediate steel beam, and concrete is poured into the column head to form a steel reinforced concrete capital. Shiguchi construction method for pillars and beams, which is characterized by the construction of sections.