JPH0412348B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of constructing a steel reinforced concrete structure.

Conventionally, in the case of steel-framed reinforced concrete structures, even though the steel frames were pre-assembled, the reinforcing bars were placed on site around the periphery of the erected steel frames, and improvements were needed to save labor and shorten the construction period. In order to meet this demand, the applicant has previously developed a construction method in which steel frames and reinforcing bars are prefabricated as much as possible. Ta. However, in recent years, consideration has been given to reducing the amount of steel frames as much as possible, and there has been a demand for the development of a construction method that can be expected to save labor and shorten the construction period.

This invention was developed in view of the above circumstances,
Provides a construction method for steel-framed reinforced concrete buildings where the columns are made of a steel-framed reinforced concrete structure and the beams are made of a reinforced concrete structure, and the assembly work can be done extremely easily and in a short period of time, and the work is extremely safe. The purpose is to

The following is an explanation based on the illustrated example. First, the frame consisting of the steel frame and reinforcing bars of a steel-framed reinforced concrete structure to be constructed in the assembling yard of the construction site is constructed for multiple floors and multiple spans of the structure. Assemble it to form the frame unit 1. There are types of the frame unit 1 that can be assembled as shown in Figures 3 to 10, and each type has a column part 2 and a beam part 3.
and integrally constitute.

1 and 2 show a column portion 2, in which main reinforcing bars 5 and hoop bars 6 are pre-assembled in a cage shape around a column steel frame 4 made of H-beam steel or the like. At that time, the steel frame 4 is used as a supporting material, and retaining rods 7 are assembled around the steel frame 4 in a parallel cross-shape, and the main reinforcing bars 5 are bundled and attached to the retaining rods 7. And this main reinforcing bar 5
The hoop muscle 6 is wrapped around the hoop and assembled in a cage-like manner. In the beam portion 3, a plurality of main reinforcing bars 8 are arranged, and stirrup reinforcements 9 are arranged around them.

The frame unit 1 shown in Fig. 3 corresponds to one floor of the frame of the structure to be constructed, and the beams 3 are assembled in one direction, and the frame unit 1 shown in Fig. 4 corresponds to the structure to be constructed. The beam 3 is assembled in two directions, and the frame unit 1 shown in FIG. 5 is the second floor of the structure frame to be constructed.
The beam 3 is assembled in one direction, and the frame unit 1 shown in Fig. 6 is for one floor of the frame of the structure to be constructed.The beam 3 is assembled in one direction and is assembled for two spans. , the frame unit 1 shown in FIG. 7 is assembled for two floors of the frame of the structure to be constructed, and the beams 3 are assembled in two directions, and the frame unit 1 shown in FIG. 8 is the frame of the structure to be constructed. The frame unit 1 is assembled for one floor of the frame, the beams 3 are in two directions, and two spans are assembled, and the frame unit 1 shown in Fig. 9 is the frame unit for the second floor of the structure to be constructed, and the beams 3 are in one direction. The frame unit 1 shown in FIG. 10 is assembled for two spans, and the frame unit 1 shown in FIG.
The beam 3 has two directions and is assembled for two spans. The type and size of the frame unit 1 are determined by considering various construction conditions such as the scale of the structure to be constructed and the operating capacity of the crane.

Next, the frame units 1 assembled in this manner are lifted one by one by the crane 10 and assembled while being connected in the upper story direction and the span direction of the structure to be constructed. The connection between the frame units 1 and 1 is achieved by attaching connection plates 11 to both ends of the column steel frames 4 and 4 in the column portion 2, and then using bolts that pass through the bolt holes 12 through the connection plates 11. After tightening with nuts 13 to make the column steel frames 3, 3 connected and independent, the main reinforcing bars 5, 5 are connected to each other by pressure welding, welding, or mechanical joints such as squeeze joints and grip joints. Further, main reinforcing bars 8, 8 are connected to each other in the beam portion 3 by pressure welding, welding, squeeze joints, or the like.

Next, hoop reinforcements 6 are supplemented and placed at the joints of the column parts 2, stirrup reinforcements 9 are added and placed at the joints of the beam parts 3, and the assembly work is completed.

As described above, when constructing a steel-framed reinforced concrete structure according to the present invention, particularly a building in which the columns are made of steel reinforcing bars and the beams are made only of reinforcing bars, the steel columns are used as supporting materials, the main reinforcing bars are attached to the cross-shaped holding frame, and the main reinforcing bars are Since the hoop reinforcements are arranged in a cage-like manner on the reinforcing bars, it is possible to pre-assemble the column steel frame and the column reinforcing bars. Furthermore, by connecting the upper and lower steel frames, the assembly work of the frame can be done extremely easily and in a short period of time, and it is also easier to connect the positioned beam reinforcing bars, reducing the cost of on-site work. Furthermore, work safety can be greatly improved.

[Brief explanation of drawings]

Figures 1 and 2 are a plan view and an elevation view of the column, Figures 3 to 10 are perspective views of the frame unit, and Figures 11 and 11 are perspective views of the frame unit.
The figure is a framework diagram of a structure showing a method of assembling the framework of a steel-framed reinforced concrete structure, and FIG. 12 is a perspective view showing a state in which column parts are connected. 1... Frame unit, 2... Column, 3... Beam, 4
...Column steel frame, 5...Main reinforcing bar, 6...Hoop bar, 7
...Holding rod, 8... Main reinforcing bar, 9... Stirrup bar, 10... Crane, 11... Connection plate,
12...Bolt hole, 3...Bolt, nut.

Claims (1)

[Claims] 1. In a building where the columns are of a steel-framed reinforced concrete structure and the beams are of a reinforced concrete structure, a holding frame is built around the column steel frame in the form of a grid using the steel frame as a supporting material, and the main reinforcing bars are attached to this holding frame.
Hoop reinforcement is pre-assembled to the main reinforcing bars so as to form a cage shape, beam reinforcing bars consisting of main reinforcing bars and starp bars in one or two directions are pre-assembled together with column steel frames and reinforcing bars, and then the above-mentioned steel frames are pre-assembled; A construction method for a steel-framed reinforced concrete structure, which is characterized in that the reinforcing bars are lifted at the same time, the upper and lower column steel frames are first tightened with bolts to connect and stand on their own, and then the upper and lower column reinforcing bars are connected, and then the beam reinforcing bars are connected.