JP2006169765A - Vibration isolation structure of building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction of vibration isolation structure of a building capable of making an action of drawing force difficult on a vibration isolation device supporting each of corner posts. <P>SOLUTION: The construction of vibration isolation of the building having a base isolation device 6 between the lower part of the building and a foundation structure is divided into a plurality of parts by arranging a plurality of internal walls 2 approximately parallel with an outside wall 1 on one side of the building on the inside of the approximately square building in plan view, the corner posts 11 are provided to four corners of the building, at the same time, an axial force supporting section 15 enabling load of an upper layer story to transfer to the lower part of the building is provided at an intermediate position in the direction of the width in the internal wall at least adjacent to the corner post, and the base isolation devices are respectively provided to each corner post and each of them between the lower part of the axial force supporting section and the foundation structure. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, a plurality of inner walls that are substantially parallel to the outer wall on one side of the building are arranged in parallel on the inner side of a substantially rectangular building in plan view, and a seismic isolation device is provided between the lower part of the building and the foundation structure. The seismic isolation structure of a building.

In buildings such as apartment buildings, which are divided into a plurality of compartment walls as a plurality of inner walls parallel to the outer wall on one side of the building on the inside of a substantially rectangular building in plan view, conventionally, the four corners of the building In addition to the corner pillars, an intermediate pillar that supports the load on the upper floors is provided at every two points where the inner wall and the outside of the building intersect (see, for example, Patent Document 1), between the lower part of the building and the foundation structure In the seismic isolation structure provided with the seismic isolation device, the seismic isolation device is provided between the column and the foundation structure for each column supporting the building load (see, for example, Patent Document 2).
Therefore, in the conventional seismic isolation structure of the building, a seismic isolation device is provided between the pillar and the foundation structure for each corner pillar and intermediate pillar.
For example, a laminated rubber type seismic isolation device constructed by laminating rubber plates, etc. has high compression resistance so that it can support building loads in normal times, but rubber with a relatively small tensile force. Since plates and the like are easily damaged, there is a problem that the seismic isolation performance deteriorates when a pulling force acts on the seismic isolation device when the building rolls due to the occurrence of an earthquake.

Japanese Patent Laid-Open No. 61-10642 Japanese Patent Laying-Open No. 2001-241207 (FIG. 11)

In a conventional building seismic isolation structure in which an intermediate pillar is provided at every two locations where the inner wall and the outside of the building intersect, and a seismic isolation device is provided between each intermediate pillar and the foundation structure, for example, the inner walls are approximately equally spaced. In such a case, the magnitude of the building load acting on the seismic isolation device via each corner column in normal times is approximately half of the building load acting via each intermediate column. At the time of rolling of the building accompanying the occurrence, there is a drawback that the pulling force tends to act on the seismic isolation device supporting each corner column.
In particular, when rolling along the direction in which the inner walls are juxtaposed, each corner column is most easily moved up and down compared to each intermediate column, so a greater pulling force acts on the seismic isolation device that supports each corner column. There are easy drawbacks.
The present invention has been made in view of the above circumstances, and when a building rolls due to the occurrence of an earthquake, it is intended to make it difficult for the pulling force to act on the seismic isolation device supporting each corner post. Objective.

  The first characteristic configuration of the present invention is that a plurality of inner walls that are substantially parallel to the outer wall on one side of the building are arranged in parallel on the inside of a substantially rectangular building in plan view, and are divided into a plurality of spaces between the lower part of the building and the foundation structure. A seismic isolation structure for a building provided with a seismic isolation device, wherein corner pillars are provided at the four corners of the building, and at least the middle floor in the width direction of the inner wall adjacent to the corner pillars, and the load on the upper floor is A transmitting axial force support portion is provided, and the seismic isolation device is provided between the corner pillar and the lower portion of the axial force support portion and the foundation structure.

[Action and effect]
At the middle position in the width direction of the inner wall adjacent to the corner pillar, there is an axial force support that can transmit the load of the upper floor to the lower part of the building, and it is provided at every two locations where the inner wall and the outside of the building intersect Instead of pillars, seismic isolation devices are provided between the lower part of the axial force support part and the foundation structure and between the lower part of the corner pillar and the foundation structure. The building load acting on the seismic isolation device increases, and the pulling force is less likely to act on the seismic isolation device supporting each corner column when the building rolls due to the occurrence of an earthquake.
In addition, the number of seismic isolation devices can be reduced.

Embodiments of the present invention will be described below with reference to the drawings.
1 to 4 show a medium-to-high-rise apartment house (an example of a building) A having a seismic isolation structure according to the present invention, and an outer wall 1 on one side of the building for each level inside a substantially rectangular building in plan view. A plurality of (in the embodiment, three) door boundary walls (an example of the inner wall) 2 (2a, 2b) are arranged in parallel at substantially equal intervals, and each level is divided into a plurality of houses (four in the embodiment). It is partitioned.

  And as shown in FIG. 1, the lower structure 4 which integrally provided the retaining wall 3 is embed | buried, and the foundation structure B currently supported by the foundation pile 5 is provided, and the foundation structure B of a building lower part and the ground side is provided. Between them, a laminated rubber type seismic isolation device 6 is provided.

  As shown in FIGS. 3 and 4, the apartment house A has corridors 8 and balconies 9 arranged on the left and right sides along the longitudinal direction of the building, with the floor slabs 7 of each layer in between, and at the four corners of the building in each layer. In addition to providing corner pillars 11, intermediate pillars 12 are provided at two locations where the boundary wall 2 and the outside of the building intersect at each level to support left and right girder beams 13 along the longitudinal direction of the building at each level. An outer wall 1 extending between the first floor slab 7a and the roof slab 10 is formed by integrally connecting the corner pillars 11 on one end side in the direction with a seismic wall 14 made of reinforced concrete.

  As shown in FIG. 1 (a), each of the two end door walls 2a disposed on the left and right sides adjacent to the corner pillar 11 of the three door walls 2 is a first floor floor. In each floor between the slab 7a and the roof slab 10, an intermediate shear wall (bearing wall) made of reinforced concrete is provided at an intermediate position in the wall width direction as an axial force support that can transmit the load of the upper floor to the lower part of the building. 15 and a dry sound insulation partition wall (non-bearing wall) 16 provided along the right and left jump beams 17, and the jump beam 17 is supported by the intermediate column 12 and the intermediate earthquake resistant wall 15.

  As shown in FIG. 1 (b), the central door wall 2b arranged at the center of the three door walls 2 is provided between the first floor slab 7a and the third floor slab 7b. The central boundary wall 2b in the hierarchy (lower floor) is composed of a reinforced concrete earthquake-resistant wall (bearing wall) 18 extending to the left and right intermediate columns 12, and each level between the third-story floor slab 7b and the roof slab 10 ( The central boundary wall 2b in the upper floor) is composed of the intermediate seismic wall 15 and the partition wall 16 in the same manner as the end door boundary wall 2a, and the jump beam 17 is supported by the intermediate column 12 and the intermediate seismic wall 15. It is.

  As shown in FIGS. 1 and 2, between the lower part of each corner pillar 11 and the lower part of the intermediate pillar 12 at both ends of the central border wall 2 b and the lower structure 4 immediately above the foundation pile 5. The seismic isolation device 6 is provided, and the seismic isolation device 6 is provided between the central lower part of the intermediate seismic wall 15 in each end door boundary wall 2 a and the lower structure 4 immediately above the foundation pile 5. Along the end door boundary wall 2a, a beam 19 is provided on the lower surface side of the first floor slab 7a so that the load from the left and right intermediate columns 12 can be reliably transmitted to the seismic isolation device 6. .

[Other Embodiments]
1. The seismic isolation structure of the building according to the present invention is not limited to the seismic isolation structure provided with the laminated rubber type seismic isolation device, and a rolling type seismic isolation device or a sliding type seismic isolation device may be provided.
2. In the building seismic isolation structure according to the present invention, a seismic isolation device may be provided between the lower portion of the corner column and the axial force support portion and the foundation pile without using the lower structure.
3. The seismic isolation structure for a building according to the present invention is not only a building in which a plurality of inner walls are provided at equal intervals on the inside of the building, but also a building in which a plurality of inner walls are provided at irregular intervals on the inside of the building. You may apply to.
4). In the seismic isolation structure of a building according to the present invention, the axial force support portion provided at the intermediate position in the width direction on the inner wall may be constituted by a column that supports the load on the upper floor.
5. The seismic isolation structure for a building according to the present invention is provided with axial force support portions capable of transmitting the load of the upper floor to the lower portion of the building at the intermediate position in the width direction of all inner walls, and the lower portion of the axial force support portion and the foundation structure A seismic isolation device may be provided between each of the two.
6). The seismic isolation structure of a building according to the present invention may be provided with a seismic isolation device between the direct foundation as the foundation structure and the lower part of the building.
7). The seismic isolation structure for buildings according to the present invention may be a seismic isolation structure for buildings such as hotels, schools, and hospitals.
8). As shown in FIG. 1 (a), the building seismic isolation structure according to the present invention is provided with an intermediate seismic wall 15 as an axial force support portion only at an intermediate position in the width direction of the inner wall 2. As shown in (b), an earthquake-resistant wall 18 as an axial force support portion may be provided over the entire width of the inner wall 2.

Schematic side view of shaft Plan view showing the location of seismic isolation devices Schematic plan view of the lower floor Schematic plan view of upper floor

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer wall 2 Inner wall 6 Seismic isolation device 11 Corner pillar 15 Axial force support part B Foundation structure

Claims (1)

A plurality of inner walls that are substantially parallel to the outer wall on one side of the building are arranged in parallel inside the substantially rectangular building in plan view, and divided into a plurality of sections.
It is a seismic isolation structure for a building with a seismic isolation device between the lower part of the building and the foundation structure,
While providing corner pillars at the four corners of the building,
An axial force support portion capable of transmitting the load of the upper floor to the lower part of the building is provided at least in the intermediate position in the width direction of the inner wall adjacent to the corner pillar,
A seismic isolation structure of a building in which the seismic isolation device is provided between the corner column and the lower portion of the axial force support portion and the foundation structure.

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