JPH1046834A - Earthquake-resistant reinforcing structure of existing building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out reinforcing construction works, by which the usage of an existing building can be maintained and damage by a disaster can be reduced without obstructing the daily living of a building user, efficiently. SOLUTION: A foundation is properly built beforehand along the external edge of a balcony 32 on the balcony 32 side of an RC-constructed, SRC- constructed or S-constructed existing building 20, and extended columns 34, 34... are constructed newly while being placed in the extended sites of partition walls 26, 26... on the foundation. The newly constructed each extended column 34, 34... is connected by first extended beams 38, 38... built along the ridge direction at the floor-face height positions of each floor while each extended column 34, 34... is joined with the existing coins 22, 22... and existing beams 24, 24 of the existing building 20 by second extended beams 40, 40... built among these extended columns 34, 34... and the existing columns 22, 22... of the balcony 32 side.

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 existing RC, SRC or S-building buildings, such as flat apartment buildings such as condominiums, hotels, hospitals, and office buildings.

[0002]

2. Description of the Related Art Conventionally, various types of buildings have been constructed using RC structures, SRC structures or S structures. For example, in an existing building such as a plate-shaped apartment house, as shown in FIG. 7, columns 2, 2... Facing in the direction between the beams 1, 1 (X direction in the figure) are connected by partition walls 3, 3. Each dwelling unit is constituted between the partition walls 3, 3,.... Further, a corridor 4 is formed on one side and a balcony 5 is formed on the other side in the girder direction (Y direction in the drawing) on both outer side edges in the direction between the beams 1 and 1. 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.

[0005] However, since such a reinforcing work is to be performed in the room of each dwelling unit, the work must be performed individually for each dwelling unit, and even in each dwelling unit, the convenience of the resident must be considered. It is necessary to carry out construction after moving the furniture, curing the dust, soundproofing, etc., and the workability is not good, and even if such considerations are taken, the resident's daily life is significantly impaired. In some cases, it is necessary to consider the relocation of residents during the construction period, which may cause various problems in construction.

[0006] Such a problem is not limited to the above-described collective housing, but also applies to ordinary buildings such as hotels, hospitals, and office buildings that require continuous use of rooms, hospital rooms, offices, and the like. There is a need for improvements that do not impair the daily functionality of existing buildings and that allow for adequate and appropriate reinforcement work.

Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and has been made so that a reinforcement work that can maintain the use of an existing building and reduce the damage caused by the earthquake disaster without hindering the daily life of the building user can be efficiently performed. The purpose of the present invention is to provide an earthquake-resistant reinforcement structure for an existing building.

[0008]

According to a first aspect of the present invention, there is provided an earthquake-resistant reinforcement structure for an existing building, comprising: an RC building, an SRC building or an S building.
An additional building surface will be added to one or both sides outside the existing part, and this building surface will reinforce the existing building.

[0009] The above-mentioned structure is made of RC, SRC or S
It may be constructed by any method.

According to a third aspect of the present invention, there is provided an earthquake-resistant reinforcement structure for an existing building, wherein a plurality of partition walls are juxtaposed in a girder direction, a space between the partition walls is used as a room space, and each of the outer side edges in a beam-to-beam direction is provided on each side edge. In an existing RC or SRC building with balconies and corridors along the girder direction, at least one of the balconies and corridors is to be installed outside one or both of the balconies and corridors. A foundation is constructed on the outside, and additional pillars are newly installed on the foundation in the height direction of the existing building, and each newly installed pillar is connected with a first additional beam newly installed along the girder direction of the existing building. Further, each of the extension columns is connected to the existing building side by a second extension beam newly installed along the direction between the beams of the existing building.

[0011] In the above-mentioned seismic retrofit structure,
The first extension beam may be connected to the existing building.

Therefore, in the seismic reinforcement structure for an existing building according to claims 1 and 2 of the present invention, the existing building is reinforced by a structural surface which is added to the outside of the existing RC building, SRC building or S building. As a result, the seismic force can be distributed to the increased construction surface and the burden can be borne, thereby greatly reducing the damage caused by the earthquake in the existing building.

[0013] Even during the seismic retrofitting work for adding the above-mentioned building surface, since the building surface is constructed outside the existing building, the use of the existing building can be continued. The daily functionality of the building is not disturbed. In this way, the above construction can be added without hindering the daily activities of building users, so that the seismic retrofitting work itself can be performed efficiently and the construction period can be shortened, reducing the damage caused by the earthquake. It is possible to obtain a seismic reinforcement structure that is favorable for residents in both short-term construction.

According to a third aspect of the present invention, there is provided an earthquake-resistant reinforcement structure for an existing building, wherein the newly installed additional pillars on the foundation, the newly installed first additional beams connecting these additional pillars, and each of the additional pillars are provided. With the newly installed second extension beam connected to the building side, it is possible to newly add a structural surface by being located outside one or both of the balcony and the corridor of the existing building. Therefore, when the seismic force acts on the existing building, the seismic force can be dispersed to the added building surface, and the earthquake damage of the existing building can be significantly reduced as in the invention of claim 1. .

[0015] Also, even during the seismic retrofitting work for newly constructing the foundations, extension columns and first and second extension beams constituting the construction surface, these extension columns, the first and second extension beams, etc. are already installed. Since it is installed outside the building, daily life is not hindered by the construction, and it is preferable for residents and other building users in terms of both reduction of earthquake damage and short-term construction as in the invention of claim 1. A seismic reinforcement structure can be obtained.

Further, in the seismic reinforcement structure for an existing building according to claim 4 of the present invention, the first additional beam is connected to the existing building side, whereby the existing building is further effectively seismically reinforced. be able to.

[0017]

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.

The present embodiment is basically composed of RC structure, SRC
R on one side of the existing part of the existing building 20
The construction surface 42 of C construction or SRC construction is added and this construction surface 4
2, the existing building 20 is reinforced.
Specifically, a plurality of partition walls 2 are arranged in the row direction (Y direction).
6 are arranged side by side to form a room space, that is, a dwelling unit 28, between the partition walls 26, and balconies 32 along the girder direction (Y direction) on both outer side edges in the direction between beams (X direction).
In the existing building 20 of the RC or SRC structure provided with the corridor 30, the foundation 14 is constructed outside the balcony 32 in order to add the construction surface 42 outside the balcony 32,
On this foundation 14, RC or SRC extension columns 34 are newly installed in the height direction of the existing building 20, and each newly installed extension column 34 is connected to the girder direction (Y direction) of the existing building 20.
Are connected by a first RC or SRC extension beam 38 which is newly installed along the route. Further, each extension column 34 is connected to a newly installed RC or SRC along the beam direction (X direction) of the existing building 20.
It is configured by being connected to the existing building 20 side by a second extension beam 40 of RC structure. In the present embodiment, the first extension beam 38 is connected to the existing building 20.

Reference numeral 20 denotes an existing building constructed as an RC building, an SRC building or an S building. A construction surface 42 is constructed on one side of the existing building 20 outside the dwelling unit 28, and the existing building 20 is supported by the construction surface 42. And reinforce. The construction surface 42 is built on the newly built foundation 14.

The existing building 20 of this embodiment is constructed as a plate-like apartment house of RC, SRC or S in the same manner as in the prior art, and is arranged in two rows parallel to the girder direction (Y direction). Are connected to each other by a pair of existing beams 24. And the beam 24,
Existing pillars 22 facing each other in the direction between 24 (X direction),
Are connected by partition walls 26, 26 provided along the direction between the beams (X direction), so that each dwelling unit 28, 2 which is a room space between the partition walls 26, 26.
8 are configured.

A corridor 30 is provided on one side (upper side in FIG. 2) of the existing building 20 in the direction between the beams 24, 24, and a balcony 32 is provided on the other side (lower side in FIG. 2). Direction).

Here, in the present embodiment, the existing building 20
A foundation 14 is appropriately constructed on the side of the balcony 32 along the outer edge of the balcony 32, and additional pillars 34, 34 are arranged on the foundation 14 at positions extending from the partition walls 26, 26,. Newly established. Each of the newly installed extension columns 34, 34... Is connected by first extension beams 38, 38... Constructed along the girder direction at the floor height position of each floor, and further, the respective extension columns 34, 34. , And the existing pillars 22, 2 of the existing building 20 by the second extension beams 40, 40 ... constructed between these and the existing pillars 22, 22, ... on the balcony 32 side.
2 and the existing beams 24, 24. Connection between the existing part and the additional part, for example, the existing pillars 22, 22 ...
The connection between the second extension beams 40, 40, and the like may be performed by a conventional joint configuration such as a shear connector that can transmit shearing force. The first extension beams 38 can be formed so that the side surfaces thereof are in contact with the balcony 32 of the existing building 20. At this time, the relationship between the first extension beams 38, 38,... And the balcony 32 also depends on the magnitude of the anticipated earthquake input.
.. May be constructed so that they are merely in contact with each other so as to be close to each other, or they may be constructed so as to be integrated by a shear connector or the like. Thus, the first extension beams 38, 38
Are connected to the existing building 20 side, the existing building 20 can be more effectively reinforced by earthquake resistance. Also, as to the relationship between the extension columns 34, 34, and the second extension beams 40, 40, and the balcony 32, the first extension beams 38, 3
8 ...

As described above, the existing building 20 of the present embodiment
, The newly installed extension columns 34, 34,... On the foundation 14, the newly installed first extension beams 38, 38,. , 34.. Are connected to the existing building 20 side by the newly installed second extension beams 40, 40... And are located outside the balcony 32 of the existing building 20, so that the construction surface 42 is newly added. When the seismic force acts on the existing building 20, the seismic force can be dispersed to the structural surface 42 composed of the added columns and beams, and the earthquake damage of the existing building 20 can be greatly reduced.

That is, when the seismic force acts on the existing building 20, the seismic force can be dispersed to the added structure surface 42, and the existing building 20 can be reinforced by earthquake resistance.

The foundation 1 constituting the construction surface 42
4, additional columns 34, 34 ... and first and second additional beams 3
Even during the seismic retrofitting work for newly installing 8, 38, 40, 40, etc., these additional pillars 34, 34, and the first and second additional beams 38, 38, 40, 40, etc., are in the existing building. 2
Since the dwelling unit 18 can be continuously used since it is attached to the outside of the room 0, daily life is not hindered by the construction. As described above, the construction surface 42 can be added without hindering the daily life of the resident, so that the seismic retrofitting work itself can be performed efficiently, the construction period can be shortened, and the damage caused by the earthquake disaster can be reduced. It is possible to obtain a seismic reinforcement structure that is favorable for residents in both short-term construction.

In the present embodiment, the case where the construction surface 42 is added to the balcony 32 side is disclosed. However, the invention is not limited thereto, and the construction surface 42 may be added to the corridor 30 side. And the corridor 30 on both sides 42
The seismic strength can be further increased by adding the construction surfaces 42 to both sides in this way.

FIGS. 4 to 6 show another embodiment. 4 is a plan sectional view showing the seismic retrofitting structure of the existing building according to the present embodiment, FIG. 5 is a sectional view taken along line BB in FIG. 4, and FIG. 6 is a sectional view taken along line CC in FIG. FIG.

This embodiment is an RC building, SRC building or S-building five-story low-rise existing building 50 constructed as a hotel, a hospital, an office building, or the like. It is constructed in a closed section rectangular ring shape having And for this existing building 50,
A construction surface 56 is constructed on the outer side surface of the room 54, hospital room, office or the like, and the existing building 50 is supported and reinforced by the construction surface 56. This construction surface 56 is constructed on a newly constructed foundation 58 as in the above embodiment.

The existing building 50 of this embodiment is provided with existing beams 62, 62 ... in a rectangular arrangement between a number of existing columns 60, 60 ... arranged in a grid pattern.
Are provided in the space surrounded by the existing beams 64, 64, and the existing beams 62, 62,.
4, 54...

In the present embodiment, the courtyard 52 of the existing building 50
The foundation 58 is constructed along the reinforcement of the inner side surface 50a facing the same and the outer side surface 50b on the opposite side.
A steel frame structure (S structure) 56 is formed on the surface 8. As shown in FIGS. 5 and 6, the S-shaped construction surface 56 mainly includes a plurality of steel columns 66, which are erected on a foundation 58.
66, a plurality of steel beams 68, 68 ... which are horizontally extended between the steel columns 66, 66 ..., and a space defined by the steel columns 66, 66 ... and the steel beams 68, 68 ... Plural steel braces 7 installed in an X-shape
Are constructed as a frame structure having a length corresponding to the reinforcing portion of the existing building 50 and having a considerable width in the inward and outward directions of the existing building 50. The height of the structural surface 56 can be set as appropriate, but in the present embodiment, the building 56 is constructed at a height corresponding to the height of the existing building 50.

When the existing building 50 has a setback portion 72 as shown in FIG. 5, the setback portion 72 of the existing building 50 is set against the setback portion 72 from the side of the construction surface 56 that has been set up from the foundation 58. A projecting portion 56a that projects toward the side surface 50c and has the same frame structure as the construction surface 56 is constructed.

In particular, the steel column 6 constituting the construction surface 56
Of the steel columns adjacent to the existing building 50, the existing walls 64, 64, or approximately 6
So that it is located at the extension of 0,60 ...
The steel columns 66, 66,... Constructed in this manner are connected with the connecting steel frames 74, 74,. The transmission is ensured, and the existing building 50 is reinforced while being supported by the construction surface 56. With respect to the setback portion 72, the steel columns 66, 66,... Of the overhang portion 56a are connected to connecting steel frames 74, 74,.

Even in the seismic retrofit structure of the existing building 50 of the present embodiment, the steel columns 66, 66 are provided on the foundation 58.
… And the S-structured surface 56 of the frame structure composed of the steel beams 68, 68… and the steel braces 70, 70… that are constructed together with the steel columns 66, 66…, the seismic force has acted on the existing building 50. In this case, the seismic force can be dispersed to the additional construction surface 56, and the damage of the existing building 50 due to the earthquake can be greatly reduced. Particularly, in the present embodiment, the reinforcing portion of the existing building 50 is replaced with the inner side surface 50 on the side of the courtyard 52.
Since the support is made from both sides of the outer side surface 50b opposite to the side a, the reinforcing effect can be ensured.

Then, the foundation 5 constituting the construction surface 56
8, steel columns 66, 66, and steel beams 68, 68, and steel braces 70, 70. Even during the seismic retrofitting work, new steel columns 66, 66, and steel beams 6 are provided.
, And the steel braces 70, 70, etc. are attached to the outside of the existing building 50, so that the use of the room 54 can be continued, and the work impairs the daily functions of the existing building 50. Never. As described above, the structure 56 can be added while maintaining the functions of a hotel, a hospital, an office building, etc., so that the seismic retrofitting work itself can be efficiently performed, and the construction period can be shortened. It is possible to obtain a seismic retrofit structure that is favorable for building users in both short-term construction.

[0035]

As described above, in the seismic retrofit structure of an existing building according to claims 1 and 2 of the present invention, the R
Since the existing building was reinforced with a structure added outside the existing building of C, SRC or S, the seismic force could be distributed to the added structure and applied to it. It can greatly reduce the damage caused by the earthquake in the building.

Further, even during the seismic retrofitting work for expanding the above-mentioned building surface, the existing building can be used continuously because the building surface is constructed outside the existing building. The daily functionality of the building is not disturbed. In this way, the above construction can be added without hindering the daily activities of building users, so that the seismic retrofitting work itself can be performed efficiently and the construction period can be shortened, reducing the damage caused by the earthquake. It is possible to obtain a seismic reinforcement structure that is favorable for residents in both short-term construction.

According to a third aspect of the present invention, there is provided an earthquake-resistant reinforcement structure for an existing building, wherein the newly installed extension pillars on the foundation, the newly installed first extension beams interconnecting these extension pillars, and each of the extension pillars are provided. Is installed outside the balcony or corridor of the existing building by one or both of the new building beams connected to the existing building side by a new second extension beam, and seismic force acts on the existing building In this case, this seismic force can be dispersed to the structure composed of the added columns and beams, and the damage of the existing building due to the earthquake can be greatly reduced, as in the first aspect of the present invention.

Further, even during the seismic retrofitting work for newly constructing the foundation, extension columns, and first and second extension beams constituting the above-mentioned construction surface, these extension columns, first and second extension beams, etc. are already installed. Since it is installed outside the building, daily life is not hindered by the construction, and it is preferable for residents and other building users in terms of both reduction of earthquake damage and short-term construction as in the invention of claim 1. A seismic reinforcement structure can be obtained.

Further, in the seismic retrofitting structure for an existing building according to claim 4 of the present invention, the first extension beam is connected to the existing building side, so that the existing building is further effectively reinforced. And various other excellent effects.

[Brief description of the 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 plan sectional view showing another embodiment of the seismic retrofit structure of an existing building according to the present invention.

FIG. 5 is a sectional view taken along line BB in FIG. 4;

6 is a sectional view taken along line CC in FIG. 5;

FIG. 7 is a cross-sectional plan view showing a conventional method of seismic reinforcement of an existing building.

[Explanation of symbols]

 14,58 Foundation 20,50 Existing building 26 Partition wall 28 Dwelling unit 30 Corridor 32 Balcony 34 Extension column 38 First extension beam 40 Second extension beam 42,56 Construction surface 54 Room 66 Steel column 68 Steel beam 70 Steel frame brace 74 Connecting steel frame

Continued on front page (72) Inventor Kazuaki Tsuda 4-640 Shimoseito, Kiyose-shi, Tokyo, Japan Inside Obayashi-gumi Technical Research Institute Co., Ltd. (72) Inventor Seiji 4-640 Shimoseito, Kiyose-shi, Tokyo, Japan In Obayashi-Gumi Technical Research Institute ( 72) Inventor Yasunori Hashimoto 2-3-3 Kandaji-cho, Chiyoda-ku, Tokyo Co., Ltd. Obayashi-gumi Tokyo headquarters (72) Inventor Takeshi Akiyama 2-3-3 Kandaji-cho, Chiyoda-ku, Tokyo Co., Ltd. Obayashi group Tokyo headquarters

Claims (4)

[Claims] Claims: 1. An existing building of RC, SRC or S type, wherein a structural surface is added to one or both sides outside the existing part, and the existing building is reinforced by the structural surface. Seismic reinforcement structure. 2. The method according to claim 1, wherein the surface is made of RC, SRC or S
The seismic reinforcement structure of an existing building according to claim 1, wherein the structure is constructed by building. 3. An RC structure in which a plurality of partition walls are juxtaposed in the girder row direction, a space between the partition walls is provided as a room space, and balconies and corridors are provided along the girder row direction on both outer side edges in the direction between beams. In an existing SRC building,
In order to add a surface outside one or both of the balcony and the corridor, a foundation is constructed outside at least one of the balcony and the corridor, and an extension pillar is provided on the foundation in the height direction of the existing building. In addition to the new construction, each new extension pillar is connected by a first extension beam newly installed along the girder direction of the existing building, and each of the additional pillars is newly installed along the beam direction of the existing building. The seismic reinforcement structure of the existing building, which is connected to the existing building side with additional beams. 4. The seismic reinforcement structure of an existing building according to claim 2, wherein the first additional beam is connected to the existing building.