JPS59173441A - Steel frame reinforced concrete structure and construction thereof - 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 The present invention relates to a steel reinforced concrete structure and a construction method thereof.

Conventionally, after the required steel frame has been erected for the above-mentioned steel-framed reinforced concrete structure, for example, structures such as columns and beams, reinforcing work is carried out.
When constructing a building by performing formwork work and pouring concrete, reinforcing bars and formwork work are highly labor-intensive, and there are many issues such as loading and unloading and moving formwork materials, material management, garbage disposal measures, etc. Disadvantages such as difficulty in quality control and the need for plastering work led to increased construction costs and extended construction periods.

Also, the above pillar. When manufacturing steel reinforced concrete structures such as beams using precast concrete, there are the following drawbacks.

(1) Steel frames must be transported twice before being delivered to the site, which is uneconomical.

That is, the steel frame is once transported from a steel frame fabricator to a precast concrete factory, and is processed into a greycast steel reinforced concrete structure by incorporating it together with reinforcing bars into a required formwork and pouring concrete using a known method, and It is being transported from the site to the site.

(2) Since the steel frame is processed and transported prior to precast processing, it takes time to adjust and manage these work procedures, which lengthens the manufacturing period.

(3) The manufactured steel reinforced concrete structure has a large weight, and if the column members for two to three floors are made into one member, there is a disadvantage that heavy machinery will be required during transportation, erection, etc.

The steel reinforced concrete structure of the present invention and its construction method are as follows:
The precast reinforced concrete shell member and the steel frame are held in a predetermined position where the steel reinforced concrete structure is to be constructed, with the steel frame being incorporated within the shell member with a space between them, and the concrete is then The steel reinforced concrete structure constructed by pouring is one in which the precast reinforced concrete shell members and the steel frame are solidified and integrated with concrete, and its purpose is to eliminate the above-mentioned conventional drawbacks at once. It's about doing.

The illustrated embodiment will be described below.

Reference numeral 1 denotes a thin precast reinforced concrete shell member (hereinafter referred to as PC shell member) for a column member, which has a rectangular cylindrical shape with open upper and lower ends, and has a large number of rectangular hoop reinforcements 2 within the wall thickness at a predetermined distance from each other. They are buried in aligned rows (Figure 1).

3 is a thin precast reinforced concrete shell member for beam members (hereinafter referred to as PC shell member), which is open at the top and front and rear ends, has a U-shaped vertical section, has no square gutter, and has U-shaped stirrup bars within the wall thickness. All four of them are buried in a row at a predetermined distance from each other, and their left and right upper end portions are fully protruding (Fig. 2).

Reference numeral 5 denotes the steel frame used, which has a substantially cross-shaped cross section, and brackets 6 for beam joining are attached at required positions (Fig. 4).

7 is a steel frame for a beam having a U-shaped cross section.

Therefore, 1 the above PC board member 1. PC shell member 3.
The case of constructing columns and beams as a steel reinforced concrete structure using the steel frame 5 and the steel frame 7 will be explained in sequence. First, a plurality of steel frames 5 are installed in advance at the predetermined positions where the entire column is to be constructed, and then the PC shell member 1 is lowered and the steel frames 5 are
(Fig. 3), and a steel frame 5 is installed inside this PC shell member 1.
is installed and held upright with a predetermined space between it.

Reference numerals 8 indicate main reinforcements attached in advance to the four corners of the PC shell member 1, and 9 indicate auxiliary reinforcements for overlap joints to connect the upper and lower main reinforcements (FIG. 4).

After that, the PC shell member 3 is suspended horizontally between the upper end entrance edges of the PC shell members 1.1 facing each other at a predetermined interval (Fig. 5), and the entire inner surface of the steel frame 7 is placed inside the PC shell member 3. Assemble it with a predetermined space left in between (Fig. 6), perform the required joint 7) work on both ends of this steel frame 7 and the upper ends of the steel frames 5, 5, attach the thin PC board 10 for the floor, and install the Pfl required. Beam main reinforcement 11. After the slab reinforcements 12 and the like are moistened, concrete is placed inside the PC shell members 1 and 3, at the joints, and on the thin PC board 10 for the floor.

In this way, the columns and beams are constructed in a state where they are integrally connected at the bottom part, and the columns are made up of the PC shell member 1 and the steel frame 5 incorporated therein, with concrete filled between them (not shown in the figure). (not included) is solidified into one piece.

Further, the beam is constructed by solidifying the PC shell member 3, the steel frame 7 and the beam reinforcement 11 incorporated therein into one piece with concrete (not shown) filled between them.

By the way, the way the PC shell member 1 and the steel frame 5 and the PC shell member 3 and the steel frame 7 are erected are not limited to the above-mentioned method.
A plurality of PC shell members 1 may be installed in advance at predetermined positions, and the steel frame 5 may be suspended and incorporated therein, or the steel frame 5 may be incorporated in the PC shell member 1 in advance and established together. Similarly, the steel frame 7 may be assembled in the PC shell member 3 in advance and then hung horizontally between the upper opening edge of the PC shell member 1. The method for constructing the steel-framed reinforced concrete structure of the invention eliminates all of the above-mentioned drawbacks of the conventional structure by incorporating a steel frame into a precast concrete shell member at the construction site, and then constructing it using a very simple process of pouring a concrete truck. This can be solved quickly, and the construction period can be shortened and savings can be achieved.

In addition, the steel-framed reinforced concrete structure of the present invention has a structure in which the steel frame and the precast reinforced concrete shell member are solidified and integrated with concrete, so it is strong and durable, and since the outside is the concrete shell member, Surface finishing work by plasterers is also economical and requires no fees.

[Brief explanation of drawings]

The drawings show examples of the present invention; Fig. 1 is a perspective view of a precast reinforced concrete shell member for use in construction; Fig. 2 is a perspective view of a precast reinforced concrete shell member on the beam side; and Fig. 3 is a perspective view of a precast reinforced concrete shell member on the beam side. Fig. 4 is a front view showing a state in which a precast reinforced concrete shell member for sex use is suspended and fitted together; The figure is a front view showing the state in which the precast reinforced concrete shell member on the beam side is suspended horizontally between the precast reinforced concrete shell members on the beam side, and Figure 6 shows the state in which the steel frame is incorporated into the precast reinforced concrete shell member on the beam side. The side view and FIG. 7 are cross-sectional views of main parts showing a state in which a thin-walled PC for flooring is applied after a steel frame for a beam is assembled into a PC shell member on the beam side. 1.3... Precast reinforced concrete shell member, 5,7... Steel frame. Patent applicant Tobishima Construction Co., Ltd. Agent Patent attorney Hara 1) Nobu Nae-゛--1nee5-zu

Claims (1)

[Scope of Claims] L. A steel-framed reinforced concrete structure comprising a precast reinforced concrete shell member and a steel frame incorporated therein, which are solidified and integrated with concrete filled between them. 2. Hold the precast reinforced concrete shell member and the steel frame at the predetermined position where the steel reinforced concrete structure is to be constructed, with the steel frame installed within the precast reinforced concrete shell member with a required space between them. A construction method for a steel-framed reinforced concrete structure comprising pouring concrete into the precast reinforced concrete shell member.