JPS63241233A - Joint method of pillar and beam - 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 (Field of Industrial Application) 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 shown in Japanese Unexamined Patent Publication No. 59-179946, as a conventional construction method of this type, a steel beam with thick reinforcing bars fixed at the end, and the thick reinforcing bars attached to the column main reinforcement and band A construction method has been proposed in which the column is supported between the reinforcements, the formwork of the column is assembled in this state, 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 end portions of steel beams with thick handle reinforcements must be placed in place before concrete pouring. The structure is complicated, and it is difficult to support the weight of the steel beams.

Furthermore, because the joints of the columns and beams lack rigidity, the steel beams are easily deformed when stress is transferred between the steel beams and the reinforced concrete columns, and as the steel beams deform, their ends may come into contact with the concrete. Concrete tends to peel off on surfaces.

(Means for Solving the Problems) The present invention was proposed to solve these problems, and involves pouring concrete into reinforced concrete columns up to the bottom of the beams, and then placing concrete between adjacent columns. After a steel beam with stud 9 bolts or shear reinforcing bars is installed horizontally, reinforcing bars are placed across the end of the beam and the column head, and then the end of the steel beam reinforced with the reinforcing bars and This relates to the column and beam joint construction method, which is characterized by pouring concrete across the column head to construct a highly rigid capital section.

(Function) As described above, in the present invention, concrete for a reinforced concrete column is poured to the bottom of the beam, and with the column main reinforcement projecting upward, the steel frame has stud bolts or shear reinforcing bars planted at the end. By placing the end of the beam on the concrete top, the steel beam can be hung horizontally between adjacent columns without requiring support, and then reinforced by straddling the end of the steel beam and the column head. A highly rigid capital section is constructed by arranging reinforcing bars and pouring concrete across the reinforced end of the steel beam and the column head. Therefore, the reinforced concrete column and the steel beam are integrally connected through the highly rigid capital section, and stress transmission between the column and the beam is ensured, deformation of the beam end is suppressed, and shear is applied to the beam end. Coupled with the fact that the reinforcing bars are installed and the shear strength is increased, concrete separation does not occur at the contact surface between the steel beam end and the concrete surface when stress is transmitted between the columns and beams.

(Effects of the Invention) According to the present invention, by mounting the end of a steel beam on the head of a reinforced concrete column in which concrete has been cast to the bottom of the beam, it is possible to set the steel beam to the column without requiring support. This is something that can be easily carried out without much effort, and in addition, concrete is poured using on-site reinforcement to construct a highly rigid capital section at the column head, and the stress transmission between the columns and beams is ensured through the capital section. At the same time, the shear strength is increased by the stud bolts or shear reinforcing bars installed at the ends of the beams to prevent concrete from peeling off at the ends of the steel beams when stress is transmitted.

Furthermore, the present invention includes pouring concrete for a reinforced concrete column to the bottom of the beam, setting a steel beam at the head of the stud,
The work can be significantly simplified by assembling columns and beams in one layer by repeating the simple work of attaching formwork only to the capital section and pouring cast-in-place concrete.

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

Concrete for the reinforced concrete column (A) is poured to the bottom of the beam (see Figure 1), and then stud bolts (1) or steel beams such as H-beams with shear reinforcing bars are placed in the main reinforcement of the column (2). The pillars are suspended horizontally between the capitals that protrude upward. (3) in the figure is a beam support installed at the capital of the column.

(See Figure 2) Next, after attaching the lower end main reinforcement (4) with a hook at the end across the end of the beam (to) and the column head, tie bars (5) are installed between the column main reinforcements (2). Further, the upper main reinforcement (4') with a hook at the end is installed across the beam end and the column head, and then the auxiliary reinforcement (4') is installed between the upper and lower end main reinforcement (4) (4).
6) Arrange reinforcement. (See Figure 3) Next, install the formwork (force) for the column and beam joints, and install the floor formwork (not shown). (See Figure 4) Next, install the formwork for the joints 9-) (8) and floor concrete) (
9), and the columns and beams are integrally joined via the thus constructed capital portion α1 having a large cross-sectional area and high rigidity. (See Figures 5, 6, and 7) In the figures, q indicates a small beam.

In this way, according to the embodiment, the reinforced concrete column (
Repeat the simple work of pouring A) to the bottom of the beam, setting the steel beam () on the head of the stud (A), attaching formwork (7) only to the capital part αQ, and pouring cast-in-place concrete. By assembling columns and beams in one layer, the work can be significantly simplified.

Further, according to the present invention, by mounting the end of the steel beam CB on the column head, the steel beam can be easily set to the column A without requiring any support. The capital part a with a large cross-sectional area and high rigidity is created at the column head by placing concrete using on-site reinforcement.
Build the pillar (of the beam) by the same capital part a1
are integrally connected to facilitate the transmission of stress between the columns and beams, and the shear strength is increased by the stud 9 bolts (1) installed in the beams, and the concrete at the ends of the steel beams is This prevents the peeling off.

8 and 9 show other embodiments of the invention.

The capital section is constructed in an octagonal 1,000-fold shape to greatly increase the rigidity of the column and beam joints.

In the figure, parts equivalent to those of the above embodiment are given the same reference numerals.

[Brief explanation of drawings]

Figures 1 to 5 are side views showing the steps of an embodiment of the joint construction method for columns and beams according to the present invention, and Figure 6 is a cross-sectional plane showing the joint section of the columns and beams constructed by the same construction method. 7 is a partial slope view of a structure having a joint section, FIG. 8 is a cross-sectional plan view of a joint section of a column and beam constructed according to another embodiment of the construction method according to the present invention, and FIG. The figure is a partial perspective view of a structure having the same joint section. (5)...Reinforced concrete column, (B)...Steel beam, (1)...Stud bolt, (2)...Column main reinforcement,
(4)...Lower end main reinforcement, (4)...Upper end main reinforcement, (6)
... Auxiliary reinforcement, (8) ... Joint section concrete, α [・
・Φ Yapital Department. Figure 3 Figure 5 Figure 6

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 steel beams with stud bolts or shear reinforcing bars are placed horizontally between adjacent columns. Afterwards, reinforcing reinforcing bars are placed across the end of the beam and the column head, and then concrete is poured across the end of the steel beam reinforced with reinforcing bars and the column head to create a highly rigid capital section. Shiguchi construction method of pillars and beams.