JPH09235890A - Seismic reinforcement structure for existing buildings - Google Patents

Abstract

(57) [Abstract] [Problem] To apply seismic control reinforcement to an existing building without using the reinforcement work for the existing building while the building is in use. SOLUTION: A vibration control frame 2A having a plane frame or a three-dimensional frame incorporating a vibration control device 3 is constructed, and the existing building 1 and the vibration control frame 2A are connected by a connecting member 4, or a plane frame or a three-dimensional frame. The seismic resistant frame 2B is constructed, the existing building 1 and the seismic resistant frame 2B are connected via the seismic damping device 5, or these are combined to form a seismic strengthening structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an existing building by adding a seismic control frame incorporating a seismic control device to an existing building or by adding a seismic resistant frame to the existing building via the seismic control device. The present invention relates to a seismic control reinforcement structure of an existing building for seismic control and reinforcement of objects.

[0002]

2. Description of the Related Art
There are the following methods to improve the seismic safety of existing buildings. A method of newly installing seismic resistant elements such as steel braces and bearing walls in existing buildings, a method of increasing the wall thickness of bearing walls, and a method of reinforcing existing columns and beam frames (addition of reinforcement bars for columns and beam sections) Size increase, steel plate winding reinforcement, carbon fiber reinforced member winding reinforcement, cover plate welding reinforcement for steel frame cross section, etc.,
Method by combination of.

However, there are the following problems when planning and implementing these reinforcement works. That is, the first problem is that when the above-mentioned reinforcement is applied, excessive stress is concentrated on the reinforced portion, so that the existing pillar / beam structure around it cannot withstand the stress concentration. Reinforcement may also be required. As a result, the scope of reinforcement work tends to expand. The second problem is that the area of reinforcement work must extend over a wide area on each floor of the building. Third
The problem with the above is that there are large restrictions on the building usage plan when the above construction is carried out.

In particular, each of the above constructions 1 to 6 requires reinforcement work inside the building, which causes problems different from those in the case of a new building construction, such as securing weight and transportation lines of construction materials and securing working space. . That is, there is a problem in that the work execution and life of the resident in the building are greatly restricted, and the resident of each floor of the building is forced to move prior to the reinforcement work. So-called "removal work" is difficult.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide seismic control reinforcement to an existing building while the building is in use.

[0006]

According to the present invention, a flat frame structure or a three-dimensional frame structure in which a seismic control device is incorporated is provided independently of an existing building in an area outside or inside the existing building that does not interfere with the existing building. Construct a vibration control frame and connect the existing building and the vibration control frame. Alternatively, a seismic resistant structure of a flat frame structure or a three-dimensional frame structure is constructed independently of the existing structure in an area outside or inside the existing structure that does not interfere with the existing structure, and the existing structure and the earthquake resistant structure are seismic control devices. Connect via. Or, in the area that does not interfere with the existing building outside or inside of the existing building, construct a flat frame structure or a three-dimensional frame structure that incorporates a vibration control device, independently of the existing structure. The seismic control frame is connected via a seismic control device.

When the plane shape of the existing building is closed, the vibration control frame or the seismic resistant frame is constructed around the outer periphery of the existing building, and when it has an open shape or a shape having a hollow portion, it is existing. It is built on either the inner or outer circumference of the building, or both.

In principle, a seismic control frame or a seismic frame is to be newly constructed up to the foundation part (in the case of a pile foundation, the existing pile may sometimes bear the axial force), but it is composed only of the ground portion. Alternatively, it may be composed of an above-ground part and an underground part. Further, the basement may be integrated with the basement of the existing building.

The newly constructed seismic control frame or seismic frame does not have to have the same height and number of floors as the existing building, and the height of the existing building can be changed according to the floor-specific load bearing distribution of the existing building.・ In some cases, the structure is lower than the number of floors. In addition, the newly constructed seismic control frame or seismic frame may be combined with a frame having the same height or number of floors as the existing building or a frame lower than that.

Such a vibration control frame or a vibration control frame is connected at the floor slab level of each floor of the existing building, but it is not always necessary to connect it on all floors, and the existing frame and the vibration control frame or the earthquake resistant frame are the same. If the height is different, connect the tops to each other.If the heights are different, connect the existing building and the top of the seismic control structure or the seismic resistant structure, whichever is lower, at the same height. May be.

Further, in consideration of the relationship between the rigidity and strength of the existing building and the rigidity and strength of the newly installed seismic control structure or seismic resistant structure, the existing building and the seismic control structure or seismic resistant structure are arbitrary on a plane. At the position of, the connection is made at any height in the height direction.

In the above-mentioned structure, the newly constructed vibration control frame or earthquake resistant frame is connected to the existing building, so that the connecting portion becomes a bypass for flowing the horizontal force acting on the existing structure to the earthquake resistant frame. Since the existing building and the seismic control frame or the seismic resistant frame share the horizontal force, it is possible to avoid the concentration of stress on the frame of the existing building due to the seismic control action of the seismic control device. As a result, it is not necessary to reinforce the existing building (the troublesomeness of the construction and the annoyance of the insiders associated therewith are eliminated).

When a new vibration control frame or earthquake-resistant frame is constructed outside, it does not affect the residents inside the building due to the reinforcement work (no need to move or move, There are no restrictions) and the advantage of not having restrictions on the building use plan.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows various examples of an independent frame (a vibration control frame or a vibration control frame) provided with the vibration control device of the present invention. FIG. 2 shows various examples of combinations of existing buildings and independent frames to which the present invention is applied. 3A to 3C are various examples of a method of connecting an existing building and an independent frame to which the present invention is applied.
FIG. 5 and FIG. 6 are examples of arrangement of an independent frame (a vibration control frame or a seismic frame) for an existing building.

As shown in FIG. 1 (a), an independent frame 2 independently constructed outside the area of the existing building 1 is provided with a damper (elastic-plastic damper, friction damper, viscous damper,
Vibration control devices such as viscoelastic dampers and oil dampers 3
Is incorporated into the vibration control frame 2A, and the existing building 1 and the vibration control frame 2A are connected by the connecting member 4 [α-1 type]. Alternatively, as shown in FIG. 1 (b), the independent frame 2 is a seismic resistant frame 2B, and the existing building 1 and the seismic resistant frame 2B are connected via a damping device 5 such as a damper [α-2 type]. Alternatively, as shown in FIG. 1 (c), the two are combined to connect the existing building 1 and the vibration control frame 2A via the vibration control device 5 [α-3 type].

As shown in FIG. 2 (a), the combination of the existing building 1 and the independent frame 2 is such that the independent frame 2 is composed of only the above-ground part completely independent from the existing structure 1 [β-1 type]. As shown in FIG. 2 (b), when the independent frame 2 is composed of the above-ground part and the underground part completely independent from the existing building 1 [β-2 type], as shown in FIG. 2 (c), There are cases where the independent frame 2 is composed of the above-ground portion and the underground portion, and the underground portion is integrated with the underground portion of the existing building 1, or these three cases are appropriately combined [β-3 type].

The existing building 1 and the independent frame 2 are connected to each other as shown in FIG. 3 (a) by connecting each floor [γ-1 system], and as shown in FIG. 3 (b). A method in which the tops of the lowermost ones are connected to each other or when the heights are different, the lower ones are connected to the same height position of the higher one [γ-2
Method], as shown in FIG. 3 (c), due to the relationship between the rigidity / proof strength of the existing building 1 and the rigidity / proof strength of the independent frame 2, only at a specific location on the plane and at a specific floor in the vertical direction. A method to connect stresses to prevent stress from concentrating on specific parts [γ
-3].

From the above, in the present invention, three α types,
By combining three β types and three γ systems, 27 types of damping frame structures shown in Fig. 4 can be obtained. In addition, the structure itself of the independent frame 2 (vibration control frame / seismic frame) is
It may be constructed of a three-dimensional frame or a plane frame and may be constituted by a truss, or may be a frame of only columns and beams, or a structure in which walls and braces are connected. As shown in FIG. 5, the independent frame 2 is arranged along the short side portions of the existing building 1, at the four corners of the existing building 1, or as shown in FIG. In addition, when the central portion of the existing building 1 is hollow, it may be arranged in the hollow portion and constructed so as to straddle the existing building 1 in the short side direction.

[0019]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, since the existing building and the seismic control frame or the seismic resistant frame share the horizontal force, the seismic control by the seismic control device further contributes to the structure of the existing building. Concentration of stress on the building is avoided and there is no need to reinforce existing buildings. Since there is no need to reinforce existing buildings, building a seismic frame will not impose any restrictions on the usage plan within the building. In addition, since the earthquake-resistant frame is constructed outside the existing building, it is possible to carry out the construction while the building is in use, and there is no need to move out the residents in the building. If the earthquake-resistant frame does not have a floor, the floor area will not increase, and since the building will not be expanded under the Building Standards Law, there is no increase in the building coverage ratio or floor area ratio, and there is also the effect that retrospective building of existing buildings can be avoided.

[Brief description of drawings]

FIG. 1 is a schematic side view showing various examples of an independent frame (a vibration control frame or a vibration resistant frame) provided with a vibration control device of the present invention.

FIG. 2 is a schematic side view showing various examples of combinations of an existing building and an independent frame to which the present invention is applied.

FIG. 3 is a schematic side view showing various examples of a method of connecting an existing building and an independent frame to which the present invention is applied.

FIG. 4 is a graph showing combinations of examples of the present invention.

FIG. 5 is a perspective view showing an arrangement example of an independent frame (vibration control frame or earthquake resistant frame) for an existing building of the present invention.

FIG. 6 is a perspective view showing an arrangement example of an independent frame (a vibration control frame or a seismic frame) for an existing building of the present invention.

[Explanation of symbols]

 1 …… Existing building 2 …… Independent frame 2A …… Vibration control frame 2B …… Vibration resistant frame 3 …… Vibration control device 4 …… Coupling member 5 …… Vibration control device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenji Tomioka 1-2-7 Moto Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Issei Makibe 1-2-2 Moto-Akasaka, Minato-ku, Tokyo No. 7 Kashima Construction Co., Ltd.

Claims (9)

[Claims] 1. An area independent from or existing in an area outside or inside the existing building that does not interfere with the existing building,
A seismic control reinforcement structure for an existing building, characterized in that a seismic control structure of a plane frame or a three-dimensional frame incorporating a seismic control device is constructed, and the existing building and the seismic control frame are connected. 2. An area which does not interfere with an existing building outside or inside the existing building, independently of the existing building,
An earthquake-proof reinforcement structure for an existing building, characterized in that a seismic-resistant frame structure of a plane frame or a three-dimensional frame is constructed, and the existing structure and the earthquake-resistant frame structure are connected to each other through a vibration control device. 3. In an area which does not interfere with an existing building outside or inside the existing building, independently of the existing building,
Seismic control of an existing building characterized by constructing a two-dimensional frame or a three-dimensional frame of a vibration control device, and connecting the existing building and the vibration control frame via the vibration control device. Reinforced structure. 4. The seismic control reinforcement structure according to claim 1, claim 2, or claim 3, wherein the seismic control frame or the seismic resistant frame consists of only the ground part. Reinforced structure. 5. The seismic control reinforcement structure according to claim 1, claim 2, or claim 3, wherein the seismic control frame or seismic frame is composed of an above-ground part and an underground part. Seismic reinforcement structure. 6. The seismic control reinforcement structure according to claim 1, claim 2, or claim 3, wherein the seismic control frame or seismic frame consists of a ground portion and an underground portion, and the underground portion is an existing building. A seismic control reinforcement structure for existing buildings, which is characterized by being integrated into the basement. 7. The seismic control reinforcement structure according to claim 4, claim 5, or claim 6, wherein the seismic control frame or seismic frame is connected to each floor of the existing building. Structural damping structure for buildings. 8. The seismic control reinforcement structure according to claim 4, claim 5, or claim 6, wherein the existing building and the seismic control frame or the seismic resistant frame are connected at the top or the existing building and the seismic control system. A seismic strengthening structure for an existing building, characterized in that it is connected to the lower part of the frame or earthquake-resistant frame at the same height as the other. 9. The seismic control reinforcement structure according to claim 4, claim 5, or claim 6, wherein the existing building and the seismic control frame or seismic resistant frame are at any position on the plane in the height direction. Seismic control reinforcement structure for existing buildings, characterized in that they are connected at any height.