JPH09310509A - 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: A pair of extension ridges 24 and 24 as an earthquake resisting element are extended outward of both ends of the longitudinal direction of the existing building 10 of RC construction or SRC construction, and the extension ridges 24 and 24 are connected to the existing building 10 through dampers 26. Since the extension ridges 24 and 24 are extended to both ends of the longitudinal direction of the existing building 10, both extension ridges 24 and 24 are connected with a reinforcing guarder 28, and the reinforcing guarder 28 is connected to the existing building 10 through dampers 30.

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. 3, columns 2 facing each other in the direction between the beams 1 and 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-proof reinforcement structure of an existing building of the present invention has a plurality of partition walls along the beam-to-beam direction arranged side by side in the girder direction, and these partition walls form a room space. In the existing building of RC construction or SRC construction, a seismic element is added outside at least one end of both ends in the girder direction of the existing building, and the seismic element is connected to the existing building via a damper.

In addition, in the seismic retrofit structure of the existing building, when the seismic resistant elements are added to both ends of the existing building in the girder direction, the seismic resistant elements are connected by a reinforcing girder, and the reinforcing girder is connected to a damper. You may make it connect to an existing building through.

Therefore, in the seismic retrofit structure of the existing building of the present invention, the seismic resistant element is added outside at least one end of both ends of the existing building in the girder direction, and the seismic resistant element is attached to the damper of the existing building. Is connected via
When an external force such as seismic force is applied, the damper operates by the relative displacement that occurs between the existing building and the seismic resistant element to absorb the earthquake input to the existing building, and the vibration response amount of the existing building to the earthquake It is possible to reduce the earthquake damage, and the seismic force can be applied to the existing building by the seismic element, and the damper and the seismic element can significantly reduce the earthquake damage of the existing building.

Even during the seismic retrofitting work for adding the seismic resistant elements and dampers, since these seismic resistant elements are attached to the outside of the existing building, it is possible to continue using the dwelling unit, and the construction can be carried out on a daily basis. Life will not be hindered. In this way, by adding the above-mentioned seismic resistant elements so as not to hinder the daily life of residents, the seismic retrofitting work itself can be efficiently constructed, the construction period can be shortened, and the damage from the earthquake can be reduced. It is possible to obtain a seismic strengthening structure that is suitable for residents in terms of both short-term construction.

Further, in the seismic retrofit structure of the existing building, when seismic resistant elements are added to both ends of the existing building in the girder direction, both seismic resistant elements are connected by a reinforcing girder, and the reinforcing girder is attached with a damper. By connecting it to the existing building through this, it is possible to connect both seismic elements with this reinforcing girder and restrain them from each other, so that the existing building can be further reinforced and the seismic input to the existing building is This damper can also be absorbed and reduced, effectively suppressing seismic input to the existing building and providing seismic reinforcement.

[0011]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 and 2 show an earthquake-proof reinforcing structure for an existing building showing an embodiment of the present invention. FIG. 1 is a cross-sectional plan view of the existing building cut at an arbitrary floor, and FIG. 2 is a front view of the entire existing building.

In the present embodiment, basically, a plurality of partition walls 16 along the beam direction (X direction) are arranged in parallel in the girder direction (Y direction), and these partition walls 16 form a room space, that is, a dwelling unit 18. In the existing building 10 made of RC or SRC, a pair of additional buildings 24, 24, which are seismic elements, are installed outside both ends of the existing building 10 in the column direction (Y direction). And is connected to the existing building 10. Further, since the additional buildings 24, 24 are added to both ends of the existing building 10 in the column direction (Y direction), the reinforcement girder 28 is provided between the two additional buildings 24, 24.
And connect this reinforcing girder 28 to the damper 30.
It is connected to the existing building 10 via.

The existing building 10 of the present embodiment is constructed as an RC or SRC plate-like housing similar to the conventional one, 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 the present embodiment, a closed cross-section structure is provided outside the both ends of the existing building 10 in the girder direction (Y direction) to reach from the first floor to the top floor at a distance from the existing building 10. A pair of extension buildings 24, 24 are added as seismic elements, and these extension buildings 24, 24 are further dampers 26, 26.
... is connected to the existing building 10 via.

These additional buildings 24, 24 are provided with a pair of lateral walls 24a, 24a, which are arranged in parallel along the girder direction on their extensions corresponding to the positions of the pair of existing beams 14, 14, respectively.
, And a pair of vertical walls 24b, 24b, which are arranged side by side in the beam-to-beam direction at both ends of these horizontal walls 24a, 24a, respectively, to form a hollow frame structure having a rectangular cross section.

Further, the dampers 26, 26 ... May be arranged at equal intervals on each floor of the existing building 10 as shown on the left side in FIG. 2, and in the height direction as shown on the right side in FIG. In consideration of the magnitude of the relative displacement between the existing building 10 and the additional buildings 24, 24, it is possible to intensively arrange them at a height position where the relative displacement is considered to be large. Furthermore,
As shown on the left side of FIG. 1, the dampers 26, 26 ...
Two positions may be arranged on both sides of the extension wing 24 in the beam-to-beam direction corresponding to the positions of the existing beams 14 and 14, and further, as shown on the right side of the figure, also between the vertical wall 24b and the partition wall 16. Installed, including the center of the existing building 10 between the beams 3
It is also possible to place it in several places.

Further, projecting portions 32, 32 are formed on the tops of the pair of extension buildings 24, 24 so as to project above the roof 10a of the existing building 10, and these projecting portions 32,
Steel reinforcement girder 28 for connecting these between 32
Has been erected. The reinforcing girders 28 are arranged at appropriate intervals above the roof 10a so as to cover the roof 10a. Dampers 30, 30 ... Are also interposed between the reinforcing girder 28 and the existing building 10, and the dampers 30, 30 ... Connect the reinforcing girder 28 and the roof 10a of the existing building 10 to each other.

As described above, the existing building 10 of this embodiment
In the seismic strengthening structure of No. 2, the additional buildings 24, 24 functioning as seismic resistant elements are added outside both ends of the existing building 10 in the girder direction (Y direction), and the additional buildings 24, 24
Is connected to the existing building 10 via the dampers 26, 26 ... Therefore, when an external force such as seismic force is applied, the relative displacement generated between the existing building 10 and the extension buildings 24, 24. The seismic input to the existing building 10 can be absorbed by the dampers 26, 26 that operate in accordance with the above, and thereby the vibration response amount of the existing building 10 to the earthquake can be reduced, and the extension buildings 24 and 24 can also be used to further reduce the vibration of the existing building 10. It is possible to bear the seismic force applied to the dampers 26, 26 ... and the extension buildings 24, 2
4, the damage to the existing building 10 due to the earthquake can be greatly reduced.

Even during the seismic retrofitting work for adding the additional buildings 24, 24 and the dampers 26, 26 ..., these additional buildings 24, 24 etc. are attached to the outside of the existing building 10 so that they can be used as dwelling units. Can be continued and the construction will not interfere with daily life. In this way, the above-mentioned additional buildings 24, 24, etc. can be added without disturbing the daily life of the residents, so that the seismic retrofitting work itself can be efficiently constructed and the construction period can be shortened, resulting in damage from the earthquake. It is possible to obtain a seismic strengthening structure that is suitable for residents in terms of both reduction of work and short-term construction.

Further, the column direction of the existing building 10 (Y direction)
Since the reinforcement girders 28 are connected between the two extension buildings 24, 24 which are additionally installed at both ends, and the reinforcement girders 28 are connected to the existing building 10 via the dampers 30, 30, ... Both expansion buildings 24, 2
4 can be connected to each other and can be restrained from each other, the existing building 10 can be further reinforced, and the seismic input to the existing building 10 can be connected to the reinforcing girder 28 by the dampers 30,
... can be absorbed and reduced, and the seismic input to the existing building 10 can be effectively suppressed and seismic strengthening can be performed.

Further, the additional buildings 24, 24 are the existing building 1
Since it is constructed as a hollow frame structure having a rectangular closed cross section on the side of 0, the space formed by the additional buildings 24, 24 can be effectively used as a trunk room such as a storage room or a stair space.

Further, in this embodiment, the reinforcing girder 28
Is installed above the roof 10a of the existing building 10, it is possible to cover the roof 10a with the reinforcing girder 28 to achieve all weather conditions.

In the present invention, the reinforcing girder 28 is not always necessary, and the expansion buildings 24 and 2 as seismic elements are required.
It suffices if the structure 4 for reinforcing the existing building 10 is provided.

In the above embodiment, the seismic element is
Although it has been disclosed that the horizontal walls 24a, 24a and the vertical walls 24b, 24b constitute the extension buildings 24, 24 having a rectangular cross section, the vertical walls 24b, 24b are omitted and the pair of horizontal walls 24 are omitted.
a and 24a may be simply extended in parallel, or the walls 24a, 24a ..., 24b, 24b ... may be appropriately laid out to form an appropriate seismic frame. Furthermore, although the case where the additional buildings 24, 24 are constructed at both ends of the existing building 10 has been disclosed, a configuration in which they are constructed only on one side of the existing building 10 may be adopted.

Further, in the above embodiment, the case where the seismic resistant element is constituted by the wall structure has been exemplified, but the present invention is not limited to this, and the vertical walls 24b ... Can be made into beams, or the whole can be braced frames or vibrations. Needless to say, the seismic resistant element may be constructed by adopting various well-known structural materials having an absorbing function.

In the above embodiment, the reinforcing girder 28 is used.
The case where the building is installed above the roof 10a has been described, but the additional building 2 is installed along both sides or one side of the existing building 10.
You may comprise so that 4 and 24 may be connected.

[0028]

As described above, in the seismic retrofit structure for an existing building according to claim 1 of the present invention, a seismic element is added outside at least one end of both ends of the existing building in the girder direction. Since this seismic element is connected to the existing building via a damper, when an external force such as seismic force is applied, the existing building and the seismic element can be installed by a damper that operates by relative displacement between them. The seismic input to the building can be absorbed, which can reduce the amount of vibration response of the existing building to the earthquake, and can also bear the seismic force applied to the existing building by the seismic resistant element. The elements can significantly reduce the earthquake damage to the existing building.

Even during the seismic retrofitting work for adding the seismic resistant elements and dampers, the seismic resistant elements and the like are attached to the outside of the existing building, so that it is possible to continue using the dwelling unit. Life will not be hindered. In this way, by adding the above-mentioned seismic resistant elements so as not to hinder the daily life of residents, the seismic retrofitting work itself can be efficiently constructed, the construction period can be shortened, and the damage from the earthquake can be reduced. It is possible to obtain a seismic strengthening structure that is suitable for residents in terms of both short-term construction.

According to the second aspect of the present invention, when the seismic resistant elements are added to both ends of the existing building in the direction of the girders, both seismic resistant elements are connected by a reinforcing girder, and
Since this reinforcement girder is connected to the existing building via a damper, both seismic resistant elements can be connected to each other by this reinforcement girder to restrain each other, and the existing building can be further reinforced and an earthquake on the existing building The dampers between the reinforcing girder and the input can also be absorbed and reduced, and the seismic reinforcement to the existing building can be effectively suppressed by suppressing the seismic input to the existing building.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view of an existing building showing an embodiment of an earthquake-proof reinforcement structure of the existing building, taken along an arbitrary floor.

FIG. 2 is a front view of the entire existing building showing an embodiment of the seismic retrofit structure for the existing building according to the present invention.

FIG. 3 is a cross-sectional plan view showing a conventional earthquake-proof reinforcement method for an existing building.

[Explanation of symbols]

 10 Existing Building 16 Partition Wall 18 Dwelling Unit 24 Expansion Building 26 Damper 28 Reinforcement Girder 30 Damper

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

Claims (2)

[Claims] 1. An RC or SRC existing building in which a plurality of partition walls along the beam direction are arranged side by side in the girder direction and a space between these partition walls is a room space, and at least one end of both ends in the girder direction of the existing building. A seismic strengthening structure for an existing building, characterized in that a seismic resistant element is added to the outside and the seismic resistant element is connected to the existing building via a damper. 2. When the seismic resistant element is added to both ends of the existing building in the girder direction, the seismic resistant elements are connected by a reinforcing girder, and the reinforcing girder is connected to the existing building via a damper. The seismic retrofit structure for an existing building according to claim 1.