JPS6354097B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for joining members in a steel-framed reinforced concrete structure, and specifically relates to a method for joining members such as steel frames when constructing structures in which steel frames and concrete are integrated, such as civil engineering, construction, and tanks. This relates to the joining method.

In conventional steel reinforced concrete structures,
When joining steel frames to each other, as shown in FIGS. 1A and 1B and FIGS. 2A and 2B, the connections are made in the same manner as in structures made of purely steel frames.

That is, Fig. 1 a and b and Fig. 2 a and b both show examples of conventional methods for joining steel frames in steel reinforced concrete (however, in this case, reinforcing bars are omitted for simplicity. ),
In particular, Figures 1a and b show a method of joining vertical members 1 and horizontal members 2, and Figures 2a and b show a standard joining method between horizontal members 2a and 2b. The horizontal members are filled H-beams, which are a typical example of steel frames. In FIGS. 1a and 1b, the flange 3 of the horizontal member 2 is welded to the flange 9 of the vertical member 1 and the flange 3 of the horizontal member 2, and is further tightened and joined with high-tensile bolts 4 via the web cover plate 7. ing. In addition, the code|symbol 5 shows a welding part, and 8 shows concrete.
In addition, in Fig. 2 a and b, horizontal members 2a and 2b
A cover plate 6 on each flange 3 between each other.
The web portions 2c and 2d are joined together by being tightened with a large number of high-tensile bolts 4, and the high-tensile bolts 4 are also tightened through the plate 7 for each web portion 2c, 2d.

However, in any case, in the conventional example, rivets,
Since they are joined by bolts and high-tensile bolts, precision is required for cutting the ends of steel frames such as H-beams, and this involves drilling, welding or rivets, and on-site joining of the bolts. Therefore, in terms of the total amount of work, reinforced concrete structures require reinforcement work in addition to the above-mentioned steel frame joint work and steel frame machining for that purpose, and compared to structures made only of reinforced concrete or structures made only of reinforcing bars, As a result, the amount of work required is greater than the sum of the amount of work required for both, and the current situation is that the advantage of a strong structure that integrates steel frames and reinforced concrete is significantly diminished in terms of construction costs. be.

The present invention aims to solve the above-mentioned drawbacks, and specifically proposes a joining method that can be easily joined without using rivets, bolts, etc. as a joining means, and that can also be performed extremely economically. .

That is, the present invention forms a protrusion on the end surface of one of the steel frames to be joined, and forms a plate-like part having a protrusion on the surface on the end of the other steel frame to be joined, and this plate-like part with the protrusion The method is characterized in that the parts are attached to the end surface of one of the steel frames to be joined at intervals, and then concrete is poured to integrate the parts.

Therefore, according to the method of the present invention, there is no need for any joining means such as rivets or bolts, and it is possible to form joints with a simple operation similar to the method for joining reinforced concrete members, and it is possible to connect steel frames to concrete structures. The advantages of using it are clearly utilized.

Hereinafter, the method of the present invention will be explained in detail with reference to the drawings.

First, FIGS. 3a and 3b are side views of an example of a joint joined by the method of the present invention, in particular, FIG. 3a is a joint between a vertical member and a horizontal member,
Figure 3b shows the joint between the horizontal members. For convenience of explanation, reinforcing bars are omitted in both Figures 3a and 3b, but in Figure 3a, the vertical steel frame 10
Projections 12 of a predetermined shape are formed at intervals on the flange surface 10a of the horizontal steel frame 11 and the flange surface 11a of the horizontal steel frame 11. In addition, the web portion 11 of the horizontal steel frame 11
b is cut along a predetermined cutting line 14, thereby removing the web at the end. When cut and removed in this way, a pair of plate-shaped parts 13 are formed at the tip of the horizontal steel frame 11. Furthermore, these plate-shaped parts 13 are bent and attached along the vertical steel frame 10, and the plate-shaped parts 13 are attached to the vertical steel frame 10. The flanges are arranged at intervals without being in direct contact with the flange surfaces 10a of 10. After the steel frame is placed at a predetermined position in this way, reinforcement is arranged as required, and then concrete 8 is poured and integrated. Furthermore, as shown in Fig. 3b, when the horizontal steel frames 11' and 11'' are joined together, a protrusion is formed on the flange surface of one of the horizontal steel frames 11'.
2 and a protrusion is formed on the flange surface of the other horizontal steel frame 11''.
The web portion is cut off along the cutting line 14 toward the edge, and the plate-like portion 13 is formed by the flange portions on both sides. These plate-like parts 13 are bent and enlarged, and the other horizontal steel frame 11'' is attached to the flange surface, and in this state, concrete 8 is poured and integrated.

As mentioned above, in any case, when joining by the method of the present invention, the steel frames are not directly joined, but the flange surfaces are made to face each other, projections are formed on these flange surfaces, and the concrete is joined. It is to be poured and integrated. Therefore, the flange stress can be transmitted to the opposing steel frame flanges via the concrete stress by using the adhesion force of the protrusions, and they can be firmly joined together.

Note that when temporarily assembling the steel frame before pouring concrete, it is sufficient to hold it in position using brackets, pieces of reinforcing steel, a shank vise, etc. that have the minimum strength to support the weight of the steel frame.

In addition, when joining as described above, the specified reinforcement is arranged, but when the vertical and horizontal steel frames are joined as shown in Figure 3a, the reinforcement is arranged as shown in Figure 4, and the vertical and horizontal The main reinforcing bars 15 and 16 are arranged. In the case of FIG. 4, the adhesion force of the protrusion 12 increases as the concrete stress in the direction perpendicular to the adhesion surface increases. For this reason, it is preferable to wrap the band reinforcing bars 17 around the joint, and thereby the large stress generated in the flange or plate-shaped portion 13 can be transmitted to the vertical steel frame 10.

Furthermore, when horizontal steel frames are joined together as shown in FIG. 3b, reinforcement is arranged as shown in FIG. In this case, band reinforcing bars 19 are placed in relation to the main reinforcing bars 18 to improve adhesion between the concrete and the protruding surface, while bending hooks 20 are provided to allow the flanges or plate-shaped portions to be inserted into the concrete 8. It can be established and reinforced.

[Brief explanation of the drawing]

Figures 1a and b are a side view and a plan view of vertical and horizontal members joined by the conventional method;
Figures a and b are side views and plan views of horizontal members joined together; Figures 3 a and b are examples of joining vertical steel frames and horizontal steel frames and joining horizontal steel frames using the method of the present invention. FIGS. 4 and 5 are side views of an application example in which reinforcing bars are arranged. Code 1... Vertical material, 2, 2a, 2b... Horizontal material, 3... Flange of horizontal material, 4... High tensile strength bolt, 5... Welded part, 6... Flange cover plate, 7... Web cover Plate, 8... Concrete, 9... Vertical flange, 10... Vertical steel frame, 11, 11', 11''... Horizontal steel frame, 12...
...Protrusion, 13...Plate-shaped part, 14...Web cutting line, 15...Vertical main reinforcing bar, 16...Horizontal main reinforcing bar,
17... Hoop reinforcing bar, 18... Horizontal main reinforcing bar, 19...
Band reinforcing bar, 20... tip bent part (hook).

Claims (1)

[Claims] 1 Form a protrusion on the end surface of one of the steel frames to be joined, and form a plate-like part with a protrusion on the surface at the end of the other reinforcing bar to be joined, and use this plate-like part with the protrusion to A method for joining members in a steel-framed reinforced concrete structure, characterized in that the end surfaces of the reinforcing bars on one side are placed at intervals, and then concrete is poured and integrated.