JPH03132551A - Arrangement structure of reinforcing bar - Google Patents

Abstract

PURPOSE:To prevent the deformation of a reinforcing bar arrangement during earthquake by a method in which a reinforcing bar arrangement structure is made up of the first reinforcing bar formed by crossing structures in which main bars are arranged and combined with both ends of the first spiral reinforc ing bars and the second reinforcing bar formed by combining the main bars with the inner surface of the second spiral reinforcing bars which are crossingly connected to the first reinforcing bar. CONSTITUTION:In the first reinforcing bar 1, two structures 5 formed by arrang ing and combining main bars 3 with the inside of both end bent parts 4 of the first cylindrical rectangular spiral reinforcing bars are crossingly set. Also, in the second reinforcing bar 6, the second cylindrical spiral reinforcing bar 7 is provided, where the radius of the bar 7 is made smaller than half of the longitudinal length of the first spiral reinforcing bar 2. The reinforcing bars 7 are inserted while spirally turning in the first spiral reinforcing bars 2 of the first reinforcing bar 1 and combined with the reinforcing bars 2. Further more, the main bars 3 are combined with the inside of the second spiral reinforc ing bar 7 to form the second reinforcing bar 6. The flow of concrete during placing period can thus be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a reinforcing bar arrangement structure in a reinforced concrete column composed of main bars and reinforcing bars.

BACKGROUND OF THE INVENTION Conventional reinforcing structures of this kind are known as shown in FIGS. 6 and 7, and these will be described below.

In FIG. 6(A), square hoop reinforcements 31 surround the main reinforcement 3 and are configured in a prismatic shape, and both ends thereof form hook portions 32 and are tightened to the main reinforcement 3, forming two hoop-shaped, Core M
33, 33' intersect in a cross shape and are tightened to the main reinforcement 3 by hook portions 34 provided at both ends, respectively.

FIG. 7 shows reinforcing bars 41 arranged in a vertical and horizontal lattice pattern on the main bars 3.
42 are assembled and welded, and the joints of reinforcing bars 41 and 42 are also welded.

Problems to be Solved by the Invention However, such a reinforcement structure as shown in FIG. 6 is difficult to work with, and as shown in FIG. 33' creates a three-stage structure such as stages (1), (2), and (2), which narrows the interval between each movement, thereby causing a problem in that the flow of concrete becomes poor.

Furthermore, in the case shown in FIG. 7, it is difficult to make the lengths of the reinforcing bars 41 and 42 that protrude outward from the main @3 the same;
Since the lengths of these protrusions are not the same, the thickness of the concrete on the outside of the protrusions, the so-called cover thickness, varies; in other words, the cover thickness is:
There is a problem in that where the protruding length of the reinforcing bar is large, its effective thickness becomes correspondingly small.

Therefore, the purpose of this invention is to solve the above-mentioned problems of the conventional reinforcement structure, to make the assembly work easy, without having to use a three-tiered structure, without impairing the flow of concrete = 1. It is an object of the present invention to provide a reinforcement structure in which the cover thickness of concrete can be made constant and which has a large resistance to the forces generated at the upper and lower ends of columns during an earthquake.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention has two structures connected by arranging main reinforcements in the bent portions at both ends of a first spiral reinforcing reinforcement having a rectangular cylindrical shape, so as to be orthogonal to each other. A reinforcing bar arrangement structure having a first reinforcing bar arranged in a straight line, and a second reinforcing bar in which a main bar is connected to the inner periphery of a circular cylindrical second spiral reinforcing bar that intersects and is connected to the first spiral reinforcing bar. be.

Operation: The first spiral reinforcing bar having a rectangular cylindrical shape, the second spiral reinforcing bar having a circular cylindrical shape, and the main reinforcing bar are formed in advance and transported to the construction site, and the main reinforcing bar is placed within the bent portions at both ends of the first spiral reinforcing bar. A pair of connected structures are arranged perpendicularly to form a first reinforcement, and a second spiral reinforcement is placed to intersect with the first spiral reinforcement, and then the spiral reinforcement is connected, and this The main reinforcement is connected to the inner periphery of the second spiral reinforcing reinforcement.

Embodiments According to the embodiments of the present invention shown in FIGS. 1 to 5,
1 in FIG. 3 shows the first reinforcement arrangement, and this first reinforcement arrangement 1 is made by arranging the main reinforcements 3 in the bent portions 4 at both ends of the rectangular cylindrical first spiral reinforcement 2 as shown in FIG. 4. The combined structure 5 is
Two pieces are arranged perpendicularly to each other.

The second reinforcement 6 shown in Figure 2 has a circular cylindrical second spiral reinforcement 7 shown in Figure 5.
As shown in FIG. 2, the radius is smaller than one half of the longitudinal length of the first spiral reinforcing bar 2. The second spiral reinforcement 7 is inserted into the first spiral reinforcement 2 of the first reinforcement arrangement 1 while rotating in a spiral shape, and both spiral reinforcements 2.7 are connected. The main reinforcement 3 is connected to the inner circumference of the reinforcement 7, and the main reinforcement 3 and the second spiral reinforcing reinforcement 7 constitute a second reinforcement arrangement 6.

1st. In Fig. 2, 10 indicates poured concrete, and the concrete column constructed in this way is
1st. The second reinforcement arrangement 1 and 6 effectively restrain the concrete in the area surrounded by the main reinforcement 3, and as a result, the shear strength of the column is increased and deformation is prevented against the forces generated at the upper and lower ends of the column during an earthquake. Ensure performance.

Effects of the Invention The present invention is as described above, and includes a first reinforcement arrangement in which two structures each consisting of a rectangular cylindrical first spiral reinforcement and a main reinforcement are orthogonally formed, and a circular cylindrical first reinforcement reinforcement. Since it is composed of two spiral reinforcing bars and a second reinforcing bar consisting of main reinforcing bars, it improves the flow of concrete I during concrete pouring, and also restrains the concrete area surrounded by the main reinforcing bars well. This has the effect of increasing the shear strength against the forces generated at the upper and lower ends of the column during an earthquake and preventing deformation.

[Brief explanation of the drawing]

Fig. 1 is a slope view of the embodiment of the present invention with concrete poured in a part, Fig. 2 is an enlarged plan view of the same, Fig. 3 is a slope view of the first reinforcement arrangement of the same, and Fig. 4 is Figure 5 is a slope view of a part of the structure with the same first reinforcement arrangement, Figure 5 is a slope view of the second spiral reinforcement with the second reinforcement arrangement, Figure 6 shows the first conventional example, and (a) is its plane. FIG. 7(b) is a reduced cutaway view of the same wire row opening as above, and FIG. 7 is a plan view of the second conventional example. 1...First reinforcement 2...First spiral reinforcement 3...Main reinforcement 5...Structure 6...Second reinforcement 7...Second spiral reinforcement

Claims (1)

[Claims] 1. A first reinforcement arrangement in which two structures are connected by arranging main reinforcements in the bent portions of both ends of a first spiral reinforcement having a rectangular cylindrical shape, and are arranged orthogonally to each other, and the first spiral reinforcement intersects with the first spiral reinforcement. A reinforcing bar arrangement structure including a second reinforcing bar in which a main reinforcing bar is coupled to the inner periphery of a coupled circular cylindrical second spiral reinforcing bar.