JPH09310506A - Earthquake resistant reinforcing construction of existing building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide earthquake resistant reinforcing construction of the existing building capable of efficiently accomplishing reinforcing work for making it possible to reduce earthquake disaster without being hindered from keeping the use of dwelling units and daily lives of residents. SOLUTION: Extension columns 24, 24... reaching the outside ends of a balcony 22 are newly erected to the extended outside of partition walls 16, 16... on the balcony 22 side of the existing building 10 of SRC construction that they are brought into contact with the existing erected columns 12 of the existing building 10. The newly erected extension columns 24, 24... are brought into contact with the existing beams 14 in the direction of a girder of the existing building 10 and are connected with newly built extension beams 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic retrofit structure for an RC or SRC existing building such as a plate-shaped housing complex.

[0002]

2. Description of the Related Art Conventionally, in an existing building such as a plate-shaped apartment house constructed by RC construction or SRC construction, as shown in FIG. 4, pillars 2 facing each other in the direction between the beams 1, 1 (X direction in the figure). 2 ... are connected to each other by partition walls 3, 3 ,.
3 ... Each housing unit is configured in between.
In addition, the girder direction of both outer edges in the direction between the beams 1 and 1 (Y in the figure)
In the direction), a corridor 4 is formed on one side and a balcony 5 is formed on the other side. An unillustrated door is provided on the corridor 4 side between the partition walls 3, 3... Constituting each dwelling unit, and an unillustrated glass door or the like is built on the balcony 5 side.

[0003]

However, in such a conventional existing building, in the direction (X direction) between the beams 1, 1 in which the partition walls 3, 3,... Exist, these partition walls 3, 3,. While the required strength against earthquakes can be secured by forming a seismic wall, the opening area is large in the girder direction (Y direction) because of the doors and glass doors that lead to the corridor 4 and balcony 5 of each dwelling unit. However, it was difficult to secure sufficient strength against earthquakes.

As a method of increasing the strength in the girder direction of the existing building, the outer periphery of the pillars 2, 2,... Is wound with an iron plate 6, or the pillars 2, 2,. It is conceivable to add a part of the earthquake-resistant walls 7 and 8. However, since such reinforcement work will extend into the room of each dwelling unit, each dwelling unit must be individually constructed, and even in each dwelling unit, the furniture will be considered while considering the convenience of the resident. It is necessary to carry out the construction after moving, dust-proofing, and sound-proofing, etc., and the workability is not good. Furthermore, even if such consideration is taken, it will seriously hinder the resident's daily life. It is necessary to consider the relocation of residents during the construction period, and there are various problems in construction.

In view of such conventional problems, the present invention has already been made to efficiently carry out a reinforcement work that can maintain the use of dwelling units and reduce the damage of the earthquake without hindering the resident's daily life. It is intended to provide a seismic reinforcement structure for a building.

[0006]

In order to achieve such an object, the seismic retrofitting structure of an existing building of the present invention has a plurality of partition walls juxtaposed in the girder row direction to form a room space between these partition walls, and between the beams. RC structure or SR with balconies and corridors along the girder direction on both outer edges of the direction
In the existing building of C building, in order to add a construction surface to the outside of one or both of the balcony or the corridor, the additional pillar is newly installed in contact with the existing pillar in the height direction of the existing building,
The newly installed additional columns are connected to the existing beams in the girder direction of the existing building by the newly installed additional beams.

Therefore, in the seismic retrofit structure of the existing building of the present invention, one or both of the balcony or the corridor of the existing building is constructed by the above-mentioned newly installed additional pillar and the newly installed additional beam connecting these additional pillars to each other. It is possible to add a new construction by locating it outside the building. Therefore, when the seismic force acts on the existing building, the seismic force can be dispersed to the added construction, and the damage to the existing building due to the earthquake can be greatly reduced.

[0008] Even during the seismic retrofitting work for newly constructing the additional columns and additional beams constituting the above-mentioned construction surface, these additional columns and additional beams are attached to the outside of the existing building, and therefore the use of the dwelling unit is continued. The construction work will not interfere with daily life. In this way, the above-mentioned construction can be added so as not to hinder the daily life of residents, so that the seismic retrofitting work itself can be efficiently constructed and the construction period can be shortened. It is possible to obtain a seismic retrofit structure that is preferable to residents from both aspects of construction.

[0009]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 to 3 show a seismic reinforcement structure of an existing building showing one embodiment of the present invention. FIG. 1 is a schematic side view of the seismic reinforcement structure of the existing building, and FIG. 2 is a sectional plan view cut at an arbitrary floor. 3 is a sectional view taken along line AA in FIG.

In the present embodiment, basically, a plurality of partition walls 16 are arranged side by side in the column row direction (Y direction), and the partition walls 16 form a room space, that is, a dwelling unit 18, and a beam direction (X direction). A balcony 22 and a corridor 20 are provided along the girder direction (Y direction) on both outer edges of the R
In the existing building 10 of C structure or SRC structure, in order to add a construction surface 28 to the outside of one or both of the balcony 22 and the corridor 20, an extension pillar 24 is contacted with the existing pillar 12 in the height direction of the existing building 10. In addition to being newly installed, each newly installed additional pillar 24 is configured to be connected to the existing beam 14 in the girder row direction (Y direction) of the existing building 10 and connected by the newly installed additional beam 26.

The existing building 10 of the present embodiment is constructed as an RC or SRC plate-like collective housing in the same manner as in the conventional case, and each existing building is arranged in two rows in parallel to the column row direction (Y direction). A pair of existing beams 1 between columns 12, 12 ...
It is connected by 4,14. Then, the beams 14, 14
Existing columns 12, 12 facing each other in the space direction (X direction)
, Are connected by the partition walls 16, 16 provided along the beam-to-beam direction (X direction), so that the dwelling units 18, 18 which are room spaces between the partition walls 16, 16 ...
Is configured.

A corridor 20 is provided on one side (upper side in FIG. 1) of the existing building 10 between the beams 14 and 14, and a balcony 22 is provided on the other side (lower side in FIG. 1) in the column direction (Y). Direction).

Here, in this embodiment, the existing building 10 is used.
The partition walls 16, 16 ... 1 on the balcony 22 side of
Every other (in the example shown, the partition walls 16, 16
16 ...) and the existing pillar 1 of the existing building 10 on the outer side of its extension.
Extension pillar 2 that touches 2 and reaches the outer edge of balcony 22
4,24 ... and newly added extension columns 2
4, 24 ... Are connected to the existing beam 14 in the girder row direction of the existing building 10 by an additional beam 26 that is newly installed. Balcony 22
... and the additional columns 24, 24 ... and the additional beams 26, between the existing columns 12 and the additional columns 24, and between the existing beams 14 and the additional beams 2.
Depending on the magnitude of the expected earthquake input, between 6 and 6, even if they are constructed so that both sides are in contact with each other so that the extension side will lie close to the existing side, both will be sheared by shear connectors, etc. It may be constructed integrally by a conventional joint structure capable of transmitting force.

As described above, the existing building 10 of this embodiment
In the earthquake-proof reinforcement structure of,
... and these additional columns 24, 24 ... With the newly installed additional beam 26 connecting them to each other, the balcony 22 of the existing building 10
If the seismic force acts on the existing building 10, it is possible to disperse the seismic force to the existing building 10 when the seismic force acts on the existing building 10. The damage from the earthquake can be greatly reduced.

Then, the additional pillar 2 constituting the construction surface 28
4 and 24, and the additional beam 26, even during the period of the seismic reinforcement work for newly installing these additional columns 24, 24 ... and the additional beam 2
Since 6 is attached to the outside of the existing building 10, the use of the dwelling unit 18 can be continued, the daily life is not hindered by the construction, and thus the resident's daily life is not hindered. By adding the above-mentioned construction surface 28, the seismic retrofitting work itself can be efficiently constructed, the construction period can be shortened, and a seismic retrofitting structure that is preferable for residents can be obtained in terms of both reduction of earthquake damage and short-term construction. be able to.

In this embodiment, the case where the construction surface 28 is added to the balcony 22 side is disclosed, but the construction surface 28 may be added to the corridor 20 side without being limited to this. 28 both in the hall and in the corridor 20
The seismic strength can be further increased by adding the construction faces 28 on both sides.

[0017]

As described above, in the seismic retrofit structure for an existing building according to the present invention, a new extension pillar and a new extension beam connecting these extension pillars are used to connect the existing building balcony or corridor. It is possible to add a new construction to one or both outsides, and if seismic force acts on the existing building, the seismic force can be dispersed to the added construction, Earthquake damage can be greatly reduced.

Even during the seismic retrofitting work for newly constructing the additional columns and additional beams that make up the construction surface, these additional columns and additional beams will be installed outside the existing building so that the dwelling unit will continue to be used. It is possible to construct the seismic retrofit work itself efficiently because the above construction can be added without disturbing the daily life of the resident so that the daily work is not hindered by the construction work. Therefore, the construction period can be shortened, and various excellent effects can be obtained such that a seismic retrofit structure preferable for residents can be obtained in terms of both reduction of earthquake damage and short-term construction.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of an earthquake-resistant reinforcement structure for an existing building according to the present invention.

FIG. 2 is a cross-sectional plan view of an existing building cut at an arbitrary floor, showing one embodiment of an earthquake-resistant reinforcement structure for an existing building according to the present invention.

FIG. 3 is a cross-sectional view of an essential part taken along line AA in FIG. 2 showing one embodiment of an earthquake-resistant reinforcement structure for an existing building according to the present invention.

FIG. 4 is a cross-sectional plan view showing a conventional earthquake-proof reinforcement method for an existing building.

[Explanation of symbols]

 10 Existing Building 12 Existing Column 14 Existing Beam 16 Partition Wall 18 Dwelling Unit 20 Corridor 22 Balcony 24 Expansion Pillar 26 Expansion Beam 28 Structure

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuaki Tsuda 4-640 Shimo-Seido, Kiyose-shi, Tokyo Inside Obayashi Technical Research Institute Co., Ltd. In the laboratory

Claims (1)

[Claims] 1. An RC structure in which a plurality of partition walls are juxtaposed in the girder direction to form a room space between the partition walls, and a balcony and a corridor are provided along the girder direction on both outer side edges in the girder direction. In the existing building made of SRC,
In order to add a construction surface to the outside of one or both of the balcony or corridor, new extension columns will be installed in contact with the existing columns in the height direction of the existing building, and each new extension column will be installed in the column direction of the existing building. A seismic retrofit structure for an existing building, characterized in that it is connected to an existing beam and connected by a new extension beam.