JPS61146950A - Pillar reinforcement structure - 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 (a) Industrial Application Field The present invention provides reinforcement for highly earthquake-resistant concrete columns in which internal reinforcement is provided inside external reinforcement to restrain the protrusion of internal concrete. Regarding structure.

(b), Prior Art Conventionally, it has been known that the reinforcement in this type of column is simply a spiral reinforcement placed inside an external reinforcement provided with a hoop reinforcement.

(C) 0 Problems to be solved by the invention However, although it is possible to prevent the concrete from protruding by simply inserting spiral reinforcements, since the spiral reinforcements have a shape like a coil spring, they have insufficient strength against tensile and bending stress. There are some unexpected inconveniences.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, the present invention aims to provide a column reinforcement structure that is stronger against tensile and bending stress than when spiral reinforcement is used as internal reinforcement.

(Means for solving the mountain zero problem, that is, the present invention, is constructed by using a wire mesh formed by joining reinforcing bars in a mesh shape and bending it into a columnar shape as an internal reinforcement.

(e) 0 Effect With the above-described configuration, the internal reinforcement of the present invention is constituted by wire mesh, which is a mesh-like reinforcing bar, and therefore acts strongly against tensile and bending stress.

(f), Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a plan view showing an example of a column reinforcement structure according to the present invention, FIG. 2 is a front view showing an example of a wire mesh, and FIGS. 3 and 4 are plan views showing a method of installing the wire mesh on a column. , FIG. 5 is a plan view showing a construction method in another embodiment of the present invention.

As shown in FIG. 1, the column 1 has a plurality of main reinforcements 2 provided in a direction perpendicular to the plane of the drawing, that is, in the direction in which the column 1 is erected. Hoop muscle 3
is provided to connect the main reinforcements 2 to each other. The hoop reinforcements 3 and the main reinforcements 2 constitute the external reinforcement 5 of the column 1, and inside the external reinforcement 5 there are wire meshes 9 with their apexes 6a touching approximately the center of each side of the hoop reinforcements 3. A quadrangular columnar internal reinforcement 6 is provided. Note that concrete 7 is poured inside and outside of the external reinforcement 5 and the internal reinforcement 6 to form the outer shape of the column 1.

Since the pillar 1 has the above-mentioned configuration, when constructing the pillar 1, first, in a factory or the like, as shown in FIG.
- Pi, P2-P2, and P3-P3 are bent to form a quadrangular prism-shaped internal reinforcement 6. Next, hoop reinforcements 3 are wound around the main reinforcements 2 of the column 1 in a manner that connects the main reinforcements 2.
External reinforcement 5 is formed. Once the external reinforcement 5 is formed,
The internal reinforcement 6 formed in the shape of a square prism is dropped into the external reinforcement 5 from above as shown in FIG. 3, and then the dropped internal reinforcement 6 is rotated as shown in FIG. Then, the inner reinforcement 6 is positioned so that the apex 6a of each side is near the approximate center of each side formed by the hoop reinforcement 3. In this state, four more main reinforcements 2 are inserted between the apex 6a of the internal reinforcement 6 and the hoop reinforcement 3 in the vertical direction, that is, in the direction perpendicular to the plane of FIG. 4 to complete the reinforcement arrangement. After the reinforcement is completed, concrete 7 is poured to construct the column 1.

(g) 0 Effects of the Invention As explained above, according to the present invention, the wire mesh 9 formed by joining reinforcing bars in a mesh shape is used as the inner reinforcement 6, and is bent into a columnar shape. Not only can the reinforcement 6 push out the protrusion of concrete inside the outer reinforcement 5, but the reinforcement is stronger and more resistant to tensile and bending stress than when the inner reinforcement 6 is simply a spiral hoop. structure can be provided.

Note that the internal reinforcement 6 made of wire mesh 9 is not limited to the single layer as shown in FIG.
As shown in Figure 5, the internal reinforcement 6 is provided in two or more layers.
Of course, it is also possible to rotate the two parts by 45 degrees and drop them. Figure 5 (a), (b), (c
) shows an example of the reinforcement arrangement process for the internal reinforcements 6. In this case, first, all the internal reinforcements 6 are placed inside the external reinforcements 5, and then they are placed in order from the innermost internal reinforcement 6. , rotated by 45 degrees and arranged the reinforcement in the shape shown in the same figure (C1).

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of a column reinforcement structure according to the present invention, FIG. 2 is a front view showing an example of a wire mesh, and FIGS. 3 and 4 are plan views showing a method of installing the wire mesh on a column. , FIG. 5 is a plan view showing a construction method in another embodiment of the present invention. 1... Column 2... Main reinforcement 3... Hoop reinforcement 5... External reinforcement 6... Internal reinforcement 9... ...Wire mesh applicant Mitsui Construction Co., Ltd. agent Patent attorney Phase 1) Shinji Pi P2 P3 #Jjima in Figure 3 6 #Fuiyame γ in Figure 4

Claims (1)

[Scope of Claims] A column reinforcement structure comprising external reinforcement consisting of main reinforcement and hoop reinforcement provided to connect the main reinforcement, and internal reinforcement inserted into the external reinforcement. In,
A column reinforcement structure characterized by using, as internal reinforcement, a wire mesh formed by joining reinforcing bars in a mesh shape and bent into a column shape.