JPH0355346A - Arrangement construction of reinforcing steel - Google Patents

Abstract

PURPOSE:To facilitate built-up work and, at the same time, to make it possible to flow concrete smoothly and to keep the thickness of covering constant by forming forms of the peripheral and core reinforcing bars connecting to main bars into reverse U-shapes, and forming the joint of each bar by a welding construction. CONSTITUTION:Forms of the peripheral reinforcing bars 4..., 5, 5 and core reinforcing bars 1, 1, 2, 2 connected to main bars 3 are formed into reverse U-shapes, and the joint of each of bars 1-5 is formed by a welding construction. Each of the reinforcing bars 1, 1, 2, 2, 4..., 5, 5 is connected to main bars 3 without making a triple construction, and each of them is not projected outward from the main bars 3 with the different length. According to the constitution, concrete flows smoothly when the concrete is placed, and a covering amount of the concrete is kept constant so that an effective covering amount can't be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a reinforcing bar arrangement structure in a reinforced concrete column or beam with a rectangular cross section, which is composed of main bars and reinforcing bars. BACKGROUND ART Conventional reinforcing structures of this kind are known as shown in FIGS. 8 and 9, and these will be described below.

In the same figure (a), square hoop reinforcement 31 surrounds main reinforcement 3 and is configured in a prismatic shape, both ends of which are tightened to main reinforcement 3 in the form of hook portions 32, and two hoop-shaped, Nakasensuji 3
3. 33' intersect in a cross shape and are tightened to the main reinforcement 3 by hook portions 34 provided at both ends, respectively.

FIG. 9 shows reinforcing bars 41 arranged in a vertical and horizontal lattice pattern on the main bars 3.
42 is assembled and welded, and the reinforcing bars 41. 42 joints are also welded.

Problems to be Solved by the Invention However, such a reinforcement structure as shown in FIG. 8 is difficult to work with, and as shown in the figure (mouth), the square hoop reinforcement 3N. The core reinforcing bars 33 and 33' form a three-tiered structure such as stages 1, 2, and 2, and the spacing between each bar is narrow, which causes a problem in that the concrete flows poorly.

Furthermore, in the case shown in FIG. 9, it is difficult to make the lengths of the reinforcement bars 41 and 42 that protrude outward from the main reinforcement 3 the same;
Since the lengths of these protrusions are not the same, there will be variations in the thickness of the concrete on the outside, the so-called cover thickness.If the cover thickness is constant, in places where the protruding length of the reinforcing bars is large, The problem is that the effective thickness becomes that much smaller.

Therefore, the purpose of this invention is to solve the above-mentioned problems of the conventional reinforcement structure, and to make the assembly work easy, without having to use a three-tiered structure, without impairing the flow of concrete, and with the aim of improving concrete cover. It is an object of the present invention to provide a reinforcement structure that can have a constant thickness.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention has the following shapes: It is something that The outer periphery and core reinforcing bars, which are made up of reinforcing bars of the shape [type], are arranged in a lattice pattern around the main reinforcements, and the respective contact points of these main reinforcements and the outer periphery and core reinforcements are welded together.

Embodiment In the first embodiment of the present invention shown in FIGS. 1 to 4, 1 and 2 are core reinforcing bars that intersect in the longitudinal and lateral directions in the drawings, 3 is the main reinforcement, and 4 and 5 are the outer peripheries in the longitudinal and lateral directions in the drawings. Reinforcement bars are shown, and reinforcement bars 1, 2.4 are each in the shape of a figure. Fig. 1 shows the completed reinforcement structure, and Fig. 2 shows its construction process. It is attached horizontally to the main reinforcing bars 3 located at certain locations, and the attached portions are joined by welding.

A vertically oriented core reinforcing bar 1 is arranged, its bent part 7' is attached to the main bar 3 in the horizontal direction, and it is placed on the outer circumferential reinforcing bar 5, and this placing part is shown in Fig. 3. As shown, it is joined to reinforcing bars 5 by welding.

After that, the longitudinal outer circumferential reinforcing bars 4 in FIG.
is horizontally attached to the main reinforcement 3 located at the relevant location, placed on the outer circumferential reinforcing reinforcement 5, and this placement part is joined to the reinforcement 5 by welding. In the second embodiment of the present invention shown in FIGS. 5 to 7, outer reinforcing bars 4.5 are first placed around the main reinforcement 3, unlike in the first embodiment. Strain and weld together.

Between the outer reinforcing bars 4.4 and 5.
5, the core reinforcing bars 2.1 are placed in contact with the main bars 3, but one of the core reinforcing bars, the bent part 17 of the reinforcing bar 2 in the drawing, is located upwardly as shown in FIG. The outer circumferential reinforcing bars 4 are bent upward from the bottom, whereas the other core reinforcing bars 1 have their bent portions 17' above the outer circumferential reinforcing bars 5 below, as shown in FIG. It is then bent downwards, fastened, and welded together.

In this case, the bending angle of the bent portions l7 and 17' is 135'1
The angle should be 80 degrees.

As seen in the above embodiments, in the reinforcement structure of the present invention, the three-tiered structure is not hindered by the reinforcing bars, and the reinforcing bars protrude outward from the main reinforcing bars. Never.

4. Effects of the Invention This invention is as described above, and since the outer periphery and core reinforcing bars to be combined with the main reinforcing bars are formed into a shape, and the joints of each bar are joined by welding, the assembly work is easy. In addition, since the reinforcing bars do not form a three-tiered structure, the concrete flows smoothly.5Furthermore, since the reinforcing bars do not protrude outward at different lengths from the main bars, the amount of concrete covered is constant. This has the effect of not reducing the effective cover thickness.

[Brief explanation of drawings]

Fig. 1 is a plan view of the first embodiment of the present invention, Fig. 2 is a plan view showing the reinforcement arrangement just before completion of the same as above, and Fig. 3 is an enlarged view of the area surrounded by line 3 in Fig. 1. 4 is a cutaway view taken along line 4-4 in FIG. 1, FIG. 5 is a plan view of the second embodiment of the invention, and FIG. 6 is a cutaway view taken along line 6-6 in FIG. Fig. 7 is a cutaway view along the line 7-7 in Fig. 5, Fig. 8 shows the first conventional example, (a) is a plan view thereof, (opening) is a reduced view cut by the same line roller, and Fig. 9 is a plan view of a second conventional example. 1.2... Core reinforcing bars 3... Main bars 4, 5...
Outer circumferential reinforcing bars 7, 7'...bent portion 17. 17'・
...Bending part Figure 2 Figure 3 Figure 5 Figure 6 Figure 7 Figure 8 (b) N Figure 9

Claims (1)

[Claims] 1. A reinforcing structure composed of main reinforcement, outer circumference reinforcement, and core reinforcement in a lattice shape, and the shape of the reinforcement is ■, and the joints of each reinforcement are welded A reinforcement structure characterized by the following: