JPH0323005Y2 - - Google Patents

Description

[Detailed explanation of the idea] 《Industrial application field》 The present invention relates to the substructure of a seismically isolated building.

《Prior art》 Conventionally, the lower structure of a building frame was constructed on the foundation ground, and the upper structure was constructed by alternately laminating thin metal plates and rubber on top of it, or by using a seismic isolation device such as a spring structure. There is a seismic isolation structure in which the upper structure and the lower structure are not integrally connected, but maintain mutual positional freedom.

This serves to extend the horizontal natural period of the upper structure longer than the vibration period caused by seismic waves while supporting the upper structure with the seismic isolation device.

A required clearance is provided around the structure to prevent damage to the structure even if the upper structure shakes vertically and horizontally.

《Problem that the invention aims to solve》 In that case, the clearance provided around the building will not only cause problems at points of contact between indoor and outdoor areas such as entrances and exits, but also prevent rain, snow, water, and insects from entering the lower structure. There was a risk that the seismic isolation system could be adversely affected by the intrusion of foreign substances.

The present invention was developed in view of the above circumstances, and its purpose is to provide a simple isolation system that isolates the lower structure from the outside of the building without losing the protection of the seismic isolation device or the inspection work space. Earthquake is to provide the substructure of the building.

《Means for solving the problem》 In order to achieve the above object, the substructure of the seismically isolated building according to the present invention consists of an upper structure to be seismically isolated and a lower structure that is integrally fixed to the supporting ground. In a seismic isolation building in which a seismic isolation device is installed between It consists of a retaining wall, and an elastic member inserted between the retaining wall and the dogbashiri and fixed to either the dogbashiri or the retaining wall, and the lower structure is isolated and sealed from the outside. , and the clearance around the building is covered with the dog run.

<<Operation>> According to the above configuration, the seismic isolation device is placed in a space surrounded by the floor slab and dog run of the upper structure, the lower structure and the retaining wall. Then, the space between the dogbashiri and the retaining wall is sealed with an elastic member,
The movement deviation due to the difference in vibration frequency between the lower structure and the upper structure can be absorbed by the elastic member, so
The above space will always remain shielded from the outside of the building.

<<Example>> Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 explains the structure of the building, in which a lower structure 4 consisting of a retaining wall 2 and a foundation 3 is constructed in a depression excavated in the ground 1.

In order to support the upper structure 5 with this lower structure 4, a laminated rubber support 7, which is made by laminating steel plates and rubber plates alternately, is installed on the installation base 6 of the upper structure 5, which is determined in consideration of load balance. The upper structure 5 is placed on top of this. Further, a dog run 8 is provided which integrally extends outward from the side portion of the upper structure 5 and covers the lower structure 4.

The upper surface of the dog racer 8 has a slight slope outward, and its tip is bent downward at a right angle.
A drainage pit 9 is installed directly below this tip.

An elastic member 1 is provided between the back surface of the dogbashiri 8 and the retaining wall 2.
Filled with 0.

Figure 2 shows an enlarged view of the laminated rubber bearing 7, and the lower structure 4 is constructed by driving cast-in-place concrete piles or PHC piles 11 onto the bearing ground, and connecting and integrating these with a foundation beam and slab. 4
A retaining wall 2 is erected on the outer periphery of the bottom of the retaining wall.

The installation base 6 is constructed by fixing a steel plate 12, which fixes the laminated rubber support 7, to a foundation concorite cast on piles 11 using anchor bolts. A beam crosses the bottom of the upper structure 5 located opposite the installation base 6, and a column 13 is located directly above the beam. Further, a mounting steel plate 12a for coupling the upper end portion of the laminated rubber support 7 to the upper structure 5 is provided. The laminated rubber support 7 is fixed between mounting steel plates 12 and 12a with bolts.

Since seismic wave energy is absorbed by the laminated rubber bearing 7, the shaking of the structure due to the seismic waves causes a positional shift between the lower structure 4 and the upper structure 5.

Therefore, a required gap is set between the dog run 8 of the upper structure 5 and the retaining wall 2 of the lower structure 4 to allow the difference in movement due to shaking to escape. In order to close the gap formed between the retaining wall 2 of the lower structure 4 and the outer wall 14 of the upper structure 5, the canubashiri 8 extends substantially horizontally from the outer peripheral surface of the outer wall 14 onto the retaining wall 2 and closes the gap between the retaining wall 2 of the lower structure 4 and the outer wall 14 of the upper structure 5. The upper part of the structure 4 is completely shielded. In order to make this even more complete, the elastic member 10 is provided.

The elastic member 10 is illustrated in FIGS. 3 and 4. FIG. In FIG. 3, an elastic member 10 is inserted between the back surface of the dog run 8 and the top surface of the retaining wall 2. The elastic member 10 is a cylindrical hollow body, which may be made of synthetic resin. For example, it is formed into a tube shape from soft vinyl chloride resin, soft polyethylene, polyurethane, or the like. This is adhesively fixed to the retaining wall 2.

FIG. 4 shows another example in which an elastic member 10 made of a synthetic resin material in the form of a sponge is covered and fixed on the top surface of the retaining wall 2. As shown in FIG. When the lower structure 4 and the upper structure 5 swing, the dog racer slides on the back surface of the elastic member 10.

<<Effects of the invention>> As explained in detail above, the lower structure of a seismically isolated building according to the present invention is covered with a collar-like collar extending from the outer peripheral surface of the upper structure to cover the lower structure. Because of this, it is possible to cover the gap between the building and the outer circumferential surface while configuring the dogbashiri to serve as the building's entrance, exit, and balcony. Moreover, since temporary scaffolding can be erected along the outer wall surface of the building in a dog-like manner, clearance around the building does not have to be a particular problem when erecting the scaffolding. Additionally, if the equipment is supported by dog running, it will sway together with the building, so there will be no problem with connections between indoor and outdoor areas. Furthermore, since the gap between the back surface of the dogbashiri and the top of the retaining wall is closed with an elastic member, the space around the seismic isolation device is isolated from the outside without inhibiting the difference in the direction of motion between the lower structure and the upper structure. It is isolated,
There is no risk of rainwater adhering to the base of the seismic isolation device, accelerating the formation of rust, or creating a rat's nest.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing the entire seismic isolation building, Figure 2 is a sectional view partially showing the seismic isolation device and the outside,
FIGS. 3 and 4 are partial cross-sectional views showing how the elastic member closing the gap between the dog run and the retaining wall is attached. 1... Ground, 2... Retaining wall, 4... Substructure,
5... Upper structure, 7... Laminated rubber support, 8...
Inuhashiri, 10...Elastic member.

Claims (1)

[Scope of utility model registration request] In a seismically isolated building in which a seismic isolation device is provided between an upper structure to be seismically isolated and a lower structure that is integrally fixed to the supporting ground, the lower structure is removed from around the base of the upper structure. A dogbashiri extending in the shape of a brim so as to cover the dogbashiri, a retaining wall of the lower structure, and a dogbashiri fitted between the retaining wall and the dogbashiri, and either the dogbashiri or the retaining wall. 1. A lower structure for a seismically isolated building, comprising an elastic member fixed to one side, the lower structure is isolated and sealed from the outside, and a clearance around the building is covered with the dog run.