JPS62148778A - Composite structure with seismic isolation structure and non-seismic isolation structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to a composite structure of a seismic isolation structure and a non-seismic isolation structure, which is a composite structure of a seismic isolation structure and a normal non-seismic isolation structure. .

(Problem to be solved by the invention) Buildings equipped with seismic isolation devices undergo large horizontal displacements during earthquakes, so when installing a basement, it is necessary to provide a gap between the earth retaining wall around the outer periphery of the basement and the outer peripheral wall of the basement. It is necessary to keep it. In particular, when the basement has two or more floors, the retaining wall must be fixed to the ground with ground anchors to resist earth pressure. However, since it is necessary to fit the building, including the anchor, within a few mountains, using the anchor limits the building area and prevents the effective use of land, making it uneconomical.

This invention was made with the purpose of dealing with the problems associated with the construction of such base-isolated structures with basements, and it installed seismic isolation devices on the upper floors of basements at a depth that required anchors, separating the buildings. This is an attempt to solve the problem by creating a structure.

(Means to Solve the Problem) In the present invention, the building is divided into upper floors and lower floors at arbitrary floors.
In between, a seismic isolation device will be installed and the upper floors will have a seismic isolation structure, while the lower floors will have a non-seismic isolation structure, making the building a structurally separated structure to maximize the use of the site. In other words, by installing a seismic isolation device at least above the bottom floor of the basement, the depth of the earth retaining wall placed around the outer periphery of the upper floors can be made shallow, eliminating the need for ground anchors, and making it possible to construct a building to fill the entire site. possible.

(Implementation 511) The present invention will be described below with reference to drawings showing embodiments.

This invention is a composite structure A in which a building with a basement is divided into an upper floor U and a lower floor with a seismic isolation device 1 as a boundary, and the upper floor U has a seismic isolation structure and the lower floor has a non-seismic isolation structure. .

The seismic isolation device 1 is installed at least above the lowest floor of the basement, and the installation floor is arbitrarily determined according to the conditions imposed on the earth.

The embodiment shown in FIG. 1 is the most rational construction example of the present invention, in which the ground floor has a seismic isolation structure and the basement has a non-seismic isolation structure.

The reason is that the seismic force acting on the basement is smaller than that on the ground floor, and since the basement usually has many walls as earthquake-resistant elements and has a structure that is strong against earthquakes, there is little need to install seismic isolation devices below the basement. by.

In addition, there is no need to provide a gap around the perimeter of the basement and install a retaining wall.

In the embodiment shown in Fig. 2, the seismic isolation device 1 is installed on the first floor of the basement.
This is a case where the building is installed between floors, and a gap g is provided around the outer periphery of the first basement floor in anticipation of the maximum displacement of the -F floor U during an earthquake, and a retaining wall 2 is further arranged for earth retaining.

In this case, the retaining wall 2 only needs to be one layer deep, so there is no need to connect a ground anchor to the back of the retaining wall 2, and the effective use of the land is not hindered.

The embodiment shown in FIG. 3 is a case in which the second floor above ground level has a seismic isolation structure. This is an example of a case where it is difficult to secure a gap when the building is displaced in the lower part, such as when another building is built adjacent to the lower part of the ground floor.

(Effect of the invention) This invention is as described above, and since it limits the installation level of a seismic isolation device within a certain depth without making the entire building with a basement a seismic isolation structure, it is possible to install an earth retaining wall. There is no need to provide it deeply over several layers. Therefore, there is no need to connect an anchor to the back side of the retaining wall, so the building can be built all the way to the site boundary line, making it possible to use the land effectively.

[Brief explanation of drawings]

1 to 3 are sectional views showing embodiments of the present invention. A: Composite structure, U: Upper floor, L: Lower floor 1: Seismic isolation device,! ! 2 gaps, 2: retaining wall. Figure 1

Claims (1)

[Claims] (1) Separate a building with a basement into upper and lower floors,
A composite structure with a seismic isolation structure and a non-seismic isolation structure, which is constructed by installing a seismic isolation device between the upper and lower floors, and constructing the upper floor as a seismic isolation structure and the lower floor as a non-seismic isolation structure. .