JPH0978879A - Building seismic reinforcement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing method of earthquake resistance of a building which can be applied from outside the building and is suitable for the building for which it is difficult to increase an earthquake-resistant element such as a brace or a bearing wall or to reinforce a single structural member such as a pillar or a beam. SOLUTION: This is a reinforcing method of earthquake resistance for an existing apartment house 1 or the like and, according to this method, a plane of structure of which the earthquake-resistant performance is insufficient is selected in the apartment house 1. A framework 2' which prescribes the contour of the plane of structure and is portal generally is surrounded by a frame structure 10 made up of pillar-shaped members 11 and beam-shaped members 12, from outside the apartment house 1. Thereby the plane of structure is made a rigid structural plane and reinforcement of the earthquake resistance is given to the apartment house 1 as a whole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic retrofitting method for a building, and more particularly to a seismic retrofitting method that can be applied to an existing building from the outside.

[0002]

2. Description of the Related Art As a seismic retrofitting method for existing buildings, conventionally, (a) seismic elements such as braces and bearing walls are added to increase the bearing capacity of the frame, and (b) columns and beams. Steel pipe winding for structural members, concrete over-stretching,
It is generally practiced to attach a new material or the like to increase the proof stress of the structural member.

[0003]

However, (A)
In the case of, the seismic resistant elements are difficult to install, although the seismic performance is insufficient around the entrances and windows such as the window.

Further, in the case of (b), there are few buildings where columns and beams exist independently, and since they are connected to walls and floors, it is difficult to reinforce the structural members alone.

Further, in both cases (a) and (b), since the construction is carried out from the inside of the building, there is a problem in that the life of residents is disturbed.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a seismic retrofitting method of a building which can be applied to a building in which it is difficult to add seismic resistant elements or to reinforce a structural member alone. To provide.

Another object of the present invention is to provide a seismic retrofitting method for a building that can be installed from the outside of the building.

[0008]

The seismic retrofitting method according to the present invention is characterized in that a structure surface of an existing building having insufficient seismic performance is surrounded by a rigid frame structure from the outside of the building.

That is, the present invention selects a structure surface (a frame surface covering the entire building) having a lack of seismic performance (strength and / or toughness) in an existing building, and defines a frame for defining the outer contour of the structure surface. By surrounding the building with a rigid frame structure from the outside of the building, the structure is made rigid and the building is given overall seismic reinforcement.

Further, the object of the present invention is an existing building of RC structure or S structure which requires seismic reinforcement, and concrete examples thereof include condominiums, apartments, apartment houses, etc. The present invention is not limited to collective housing, and may be, for example, a store, a hospital, a school, or the like.

It is to be noted that a building in which it is difficult to add braces or load bearing walls or to reinforce columns or beams alone is a more preferable object to be implemented.

In the ramen structure according to the present invention, since the outer surface of the construction surface is generally in the form of a gate, an S structure or an RC structure (columnar member) in which a beam member is erected between columnar members and the corners are rigidly contacted Only the RC structure may be used.) However, it is possible to have an appropriate shape corresponding to the outer frame of the construction surface other than the gate shape. The columnar member is rigidly attached to the foundation or supported by a pin.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a plan view schematically showing a framework of an apartment house 1 as an existing building, and FIG. 2 is a front view of the apartment house 1 embodying the present invention.

The collective housing 1 is a general RC five-story building, and the girder direction A has a rigid frame structure such as columns and beams, and the span direction B has a multi-story earthquake-resistant wall structure. The need for seismic retrofitting in such an apartment 1 often occurs in the girder direction A as compared with the span direction B.

Therefore, in carrying out the present invention, as a structure surface having insufficient seismic performance, a structure surface along the girder direction A, which comes to the frontmost position where openings such as entrances and windows are provided (hereinafter referred to as front surface). 2) and a rearmost surface (hereinafter referred to as rear surface 3) are selected, and the front surface 2 and the rear surface 3 are selected.
A gate-shaped frame structure 2 ′ (shown by hatching) that defines the outer contour of the housing is attached from outside the housing complex 1 (see FIG. 2).

Each ramen structure 10 comprises two columnar members 1
The beam-shaped member 12 is erected between 1 and the corners are rigidly contacted,
The columnar member 11 is rigidly or pin-joined to the foundation while being fastened to the skeleton 2'with anchor bolts (not shown).

Further, both the columnar member 11 and the beam-shaped member 12 are provided with a truss structure (only a part of which is shown) between the seismic frames to enhance the strength.

By attaching the above-described rigid frame structure 10, the seismic performance of the entire housing complex 1 can be significantly improved.

In the present invention, the S-shaped ramen structure 10 is used.
Alternatively, an RC structure (only the columnar member 11 may be RC structure) may be adopted.

[0021]

As described above, according to the present invention, since seismic retrofitting can be applied to an existing building from the outside, it can be applied without hindering the lives of residents. We would like to be able to construct suitable seismic reinforcement for buildings where it is difficult to reinforce the seismic elements or the structural members alone.

[Brief description of drawings]

FIG. 1 is a plan view schematically showing a framework of an apartment house.

FIG. 2 is a front view schematically showing an apartment house in which the present invention is implemented.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Apartment house 2 Front surface 2'framework 3 Rear surface 11,13 'Plate portion 10 Ramen structure 11 Columnar member 12 Beam member

Claims (1)

[Claims] 1. A seismic retrofitting method for an existing building, characterized in that a structure having insufficient seismic performance in the building is surrounded by a rigid frame structure from the outside of the building.