JP2002242449A - Reinforcing structure and earthquake resistant reinforcing construction method using this structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a sense of incompatibility on an external appearance in a brace construction method. SOLUTION: A grating-like reinforcing body 1 is constructed by opening clearance between the body 1 and an existing building A. Rigidity of the existing building A is improved by connecting the reinforcing body 1 and an outer wall by a connecting means. The reinforcing body 1 can be finished as a regular and orderly external appearance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced concrete construction and a method for seismic reinforcement of an existing building made of steel reinforced concrete.

[0002]

2. Description of the Related Art Conventionally, as a typical example of such a seismic retrofitting method, there is a so-called brace method, in which both ends of a pair of crossed braces are fixed to an outer wall surface.

[0003]

However, in the above-mentioned construction method, there are problems to be solved, such as that the brace restricts the lighting from the opening, and that the oblique member of the brace has a large unnatural appearance. Was.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and in view of the problem that the appearance is uncomfortable, a grid-like reinforcing member is constructed with a gap between the reinforcing member and an existing building. By connecting the reinforcing member and the outer wall by the connecting means, it is possible to improve the rigidity of the existing building and, of course, finish the appearance of the building in a regular and orderly manner.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a building subjected to the seismic retrofitting method according to the present invention, FIG. 2 is a sectional view taken along line XX of FIG.
FIG. 4 is a sectional view taken along the line YY of FIG. 1, FIG.
FIG. 4 is an enlarged view of a main part of FIG. 3.

[0006] A grid-like reinforcing body 1 is constructed mainly on a foundation B constructed on a ground G outside an outer wall W of an existing building A such as a reinforced concrete structure or a steel reinforced concrete structure. The reinforcing body 1 is fixed to the existing building A via the connecting means so that a gap H is provided between the existing building A and the reinforcing body 1. As connecting means, connecting members 2, 2a ... protruding from the inner side surface of the reinforcing member 1, and connecting members 2, 2a
Are connected to anchors S, Sa, which are driven into the outer wall W of the existing building A and fixed.

As shown in FIGS. 2 to 5, connecting members 2, 2a in a connected state are formed so as to form reinforcing walls 3, 3a... And reinforcing floors 4, 4a at the connecting portion between the existing building A and the reinforcing body 1. … And anchors S, Sa… are appropriately arranged around the perimeter and then cast concrete and cast on the side walls of the reinforcing walls 3, 3a… and the reinforced floors 4, 4a… which are precast concrete plates. Connecting members 2, 2a ... and anchors S, Sa
Are preferably connected. Also, the reinforcing member 1 may be composed of a plurality of lattice-shaped components 5, 5a,..., And the components 5, 5, a.

Next, the seismic retrofitting method according to the present invention will be described. (1) Build the base B. (2) The reinforcing body 1 is constructed on the foundation B while being connected to the existing building A by the connecting means.

The above-mentioned (2) in the case of the reinforcing body 1 composed of a plurality of constituent members 5, 5a made of precast concrete.
The step of connecting and fixing the constituent member 5 on the foundation B, connecting the constituent member 5 and the existing building A with the connecting means, and then connecting and fixing the next constituent member 5a on the constituent member 5, The connection between the component 5a and the existing building A by the connecting means is repeatedly performed upward to construct the reinforcing body 1.

In the case where the connecting means is the concrete-in-place reinforcing walls 3, 3a... And the reinforcing floors 4, 4a. After connecting the connecting members 2, 2a to the set anchors S, Sa, etc., and constructing the reinforcing body 1 on the foundation B, the connecting members 2, 2a. Reinforcing bars (not shown) are appropriately arranged on the connecting members 2, 2a... Arranged in the direction and the anchors S, Sa. ... and the reinforced floors 4, 4a ... are constructed. When the reinforcing walls 3, 3a... And the reinforcing floors 4, 4a... Which are connecting means are made of precast concrete plates, the above-mentioned step (2) is performed first by using the outer wall W of the existing building A.
Are fixed in place at the predetermined positions, and then the reinforcing body 1 is mounted on the base B, the connecting members 2, 2a, and the anchors S, Sa are mounted on the reinforcing walls 3, 3a, and the reinforcing floors 4, 4a. Build while connecting to the side end surface of.

The strength of the reinforcing member 1 can be adjusted by increasing or decreasing the interval between the vertical and horizontal members, that is, by increasing or decreasing the number of vertical and horizontal members, and can secure the same strength as the brace.

[0012]

In summary, according to the present invention, since the lattice-shaped reinforcing member 1 is provided with a connecting means with the existing building A, the strength of the reinforcing member 1 is high, and the reinforcing member 1 is integrally connected to the existing building A. Because the rigidity of the existing building A is increased, the seismic function can be improved, and there is no discomfort like the conventional brace method, and it can be part of the existing building A. Because it can be finished and can be finished in a regular and orderly appearance, it can be finished with good appearance. And even if the vertical and horizontal members of the reinforcing body 1 are located outside the opening,
A sufficient opening area can be ensured, and the opening and the reinforcing body 1 are sufficiently separated from each other. Therefore, the reinforcing body 1 does not hinder the user of the existing building A, and the existing building A before the reinforcement is connected. An equivalent living environment can be provided.

Since the connecting means is the reinforcing walls 3, 3a... And the reinforcing floors 4, 4a..., The strength of the connecting portion between the reinforcing body 1 and the existing building A is improved, and the reinforcing body 1 and the existing building A are connected. Since the integration of the building A can be improved, the rigidity of the existing building A is further increased, and the seismic performance can be further improved. Also, various facilities such as an outdoor unit of an air conditioner can be installed and hidden outside the existing building A, so that the appearance of the existing building A can be further improved, and its practical effects can be improved. It is enormous.

[Brief description of the drawings]

FIG. 1 is a front view of a building subjected to a seismic retrofitting method according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a sectional view taken along line YY of FIG. 1;

FIG. 4 is an enlarged view of a main part of FIG. 2;

FIG. 5 is an enlarged view of a main part of FIG. 3;

[Explanation of symbols]

 1 Reinforcement body 3, 3a ... Reinforcement wall 4, 4a ... Reinforcement floor A Existing building

Claims (3)

[Claims] 1. A reinforcing structure comprising a grid-like reinforcing body provided with means for connecting to an existing building. 2. The reinforcing structure according to claim 1, wherein the connecting means is a reinforcing wall and a reinforcing floor. 3. The reinforcing body according to claim 1 or 2 is installed outside the existing building with a gap between the reinforcing body and the existing building, and a connecting means is provided between the reinforcing body and the existing building. A seismic reinforcement method characterized by being provided.