JPH0518979B2 - - Google Patents

Description

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

(Conventional technology) In conventional steel reinforced concrete structures,
After joining steel beams between steel columns and placing column and beam reinforcement around the outer periphery of the steel columns and along the entire length of the steel beams, column concrete and beam concrete were poured.

(Problems to be Solved by the Invention) As described above, in the conventional construction method, concrete is poured for both columns and beams, which increases the weight of the structure, which is disadvantageous in terms of foundation design. However, there were problems in that the amount of materials such as formwork was large, requiring a lot of time and effort, and increasing costs.

(Means for Solving the Problems) The present invention was proposed to solve the above problems, and is a method for joining steel beams such as H-beams with stud bolts installed between adjacent steel columns. After that,
Column reinforcing bars are arranged around the outer periphery of the steel column, and
Beam reinforcing reinforcing bars are installed across the end and the column head of the steel beam connected to the steel column, and then the formwork for the column and beam end is assembled, and the column bottom, the beam end, and the column head are assembled. A highly rigid capital section is constructed by pouring concrete across the span, and the free edge of the capital section is positioned offset toward the center of the span from the center of the joint between the columns and beams. This relates to the Shiguchi construction method for columns and beams.

(Function) In this way, the present invention connects steel beams with stud bolts between steel columns erected at predetermined positions, and then arranges column reinforcing bars around the outer periphery of the steel columns. Instead of arranging reinforcing reinforcing bars along the entire length of the outer periphery, reinforcing reinforcing bars were arranged across the end of the beam that connects to the steel column and the column head, and then reinforced with the reinforcing reinforcing bars. A highly rigid capital section is constructed by pouring concrete across the ends of the steel beams and the column heads.

Therefore, the steel reinforced concrete column and the steel beam are integrally connected through a highly rigid capital part, and the shear strength is increased by the stud bolts installed in the steel beam. Stress transmission through the beam is ensured.

In addition, in the present invention, a highly rigid capital portion is constructed at the column-beam joint, and the free edge of the capital portion is positioned offset toward the center of the span from the center of the joint between the column and beam. Therefore, the yield point of the frame is located at the free end edge x-x of the capital section as shown in Figure 2, and the effective length of the steel beam is the length l between the capital sections at both ends, which is different from the conventional column. It is shorter than the effective length L of a steel beam in a structure where the beam is a steel frame reinforced concrete structure, and the deflection is reduced.

(Effects of the Invention) According to the present invention, reinforcing and concrete pouring are performed only at the end of the steel beam that connects to the steel column, so compared to the conventional case where both the column and the beam are made of steel reinforced concrete. The amount of materials such as concrete, reinforcing bars, formwork, etc. in the center of the steel beam is reduced, saving labor and time.The reduction in the amount of concrete and reinforcing bars also reduces the weight of the building, which is advantageous in designing the foundation. .

Furthermore, according to the present invention, a highly rigid capital section is constructed, and the free edge of the capital section is shifted toward the center of the span from the joint center of the column and beam. By making the effective length shorter than the effective length of the steel beams in conventional frames where the columns are made of steel reinforced concrete and the beams are made of steel beams, the deflection of the steel beams can be reduced and an economical design can be achieved. It makes it seem possible.

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

A steel beam B such as an H-shaped steel with stud bolts 1 is connected between the steel columns A such as an H-shaped steel built in a predetermined position (see Fig. 1).
The column main reinforcement 2 and the band reinforcement 3 surrounding the column main reinforcement 2 are arranged around the outer circumference of the column, and the beam top reinforcement 4, the beam bottom reinforcement 4', and both are surrounded over the end of the steel beam B and the column head. The reinforcing bars 5 are arranged (see Figure 2), then the column formwork 6, the beam end formwork 7, and the floor formwork (not shown) are assembled (see Figure 3), and then the column concrete 8 and Floor concrete 10 is poured along with beam end concrete 9. The columns and beams are integrally joined via the thus constructed capital portion 11 having a large cross-sectional area and high rigidity. (Figures 4, 5 and 6
(See figure) C in the figure is a small beam.

According to the above embodiment, the beam top reinforcement 4, the beam bottom reinforcement 4', and the cost reinforcement 5 are arranged only at the end of the steel beam B connected to the steel column A, and the floor concrete 10 is placed. The amount of materials such as concrete, reinforcing bars, formwork, etc. in the center of steel beam B is reduced, labor is saved, and by reducing the amount of concrete and reinforcing bars,
The weight of the structure is reduced, which provides design advantages.

Further, according to the embodiment, the steel column A and the steel beam B
The columns are integrally joined via the highly rigid capital section 11, and the stud bolts 1 are installed on the steel beam B, which improves shear strength and ensures reliable transmission of stress between the columns and beams. In addition, to explain the effective length of the steel beam B, by biasing the free edge of the capital section toward the center of the span from the center of the column-beam joint, the yield point of the column-beam joint can be increased. moves to the free end edge x-x of the capital section, and the effective length of the steel beam B becomes the length l between the opposing capital sections 11, 11,
The columns are shorter than conventional steel beams when the steel reinforced concrete beams are used as steel frame structures, and the deflection is reduced.

As described above, according to the above embodiment, it is possible to construct a frame that is lighter in weight and has a larger span than the conventional structure, and it is possible to construct a structure that is advantageous both economically and structurally.

FIGS. 7 and 8 show another embodiment of the present invention, in which the capital section 11 is arranged in an octagonal planar shape to further increase the rigidity of the column-beam joint.

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

[Brief explanation of the drawing]

Figures 1 to 4 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 5 shows the joint section of the columns and beams constructed by the same construction method. A plan view, FIG. 6 is a partial slope view of a structure having the same joint, and FIG. 7 is a cross-sectional plan view of the joint of a column and beam constructed according to another embodiment of the construction method according to the present invention. , 8th
The figure is a partial perspective view of a structure having the same joint section. A... Steel column, B... Steel beam, 1... Stud bolt, 2... Column main reinforcement, 3... Stir reins, 4... Beam top end reinforcement, 4'... Beam bottom end reinforcement, 5... Cost reinforcement , 6... Column formwork, 7... Beam end formwork, 8... Column concrete, 9... Beam end concrete, 11... Capital section.

Claims (1)

[Claims] 1. After joining steel beams such as H-shaped steel with stud bolts installed between adjacent steel columns, column reinforcing bars are arranged around the outer periphery of the steel columns, and the ends of the steel beams connected to the steel columns are Beam reinforcing reinforcing bars are placed across the column and the column head, then the formwork for the column and beam end is assembled, and concrete is poured across the column bottom, the beam end, and the column head to ensure high rigidity. A column-beam joint construction method characterized by constructing a capital section and locating the free edge of the capital section toward the center of the span from the center of the joint between the columns and beams.