SU1645383A1 - Earthquake-proof foundation of building - Google Patents

Abstract

The invention relates to a technique for making an earthquake-resistant foundation of a building and improves the stability of a building when it perceives vertical seismic effects. The foundation consists of a lower support block 1, vertical rods in the form of struts 2 and an upper support block consisting of a flexible plate 3 and an outer 4 and an inner 5 bearing elements mounted coaxially on it. The slab is supported on pillars, is made in plan of individual sectors and has supporting shoes 7 on the bottom surface, which are housed in bulk material 6, the walls of the excavation in which the foundation is erected, and the side surface of the supporting shoes form an angle equal to the angle of seismic slope with the horizontal bulk material. 2 Il.

Description

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The invention relates to the construction, in particular to the technique of making seismic resistant foundations of buildings and structures

The purpose of the invention is to increase the stability of a building when it perceives vertical seismic effects,

FIG. 1 shows a building with a proposed seismic foundation, a cross section; in fig. 2 is a section A-A in FIG. one.

The foundation includes a lower support block 1, vertical support rods in the form of a drain 2 and an upper support block consisting of a flexible spring plate C with an outer 4 coaxially installed in it and an inner 5 closed support elements,

The foundation pit of the building is filled with bulk material 6, such as sand. The walls of the pit are sloping, the angle of inclination to the horizontal plane is equal to yi of the seismic resistant slope of the bulk material 6 that fills the pit.

At the bottom of the excavation, the lower support block 1 is laid, on which the supports 2 of square or round section are mounted, installed, in one row or several p / s. On the racks, its middle part is supported by slabs-3, cut in plan into sectors. The plate at its edges rests on the outer 4 and the inner 5 and, on the other hand, there are separate building elements which are located coaxially with one another. In places of bearing on the plate on its lower surface, support shoes 7 are filled, the side walls of which are placed in the bulk material 6 and inclined to the horizon at an angle equal to the angle of the earthquake-resistant slope of the bulk material.

When seismic boulders occur, the foundation works as follows.

The vertical components of the pulse, including the vertically directed shocks, are sensed by the lower support block 1 y through the vertical supports 2

are transmitted to the slab 3, which damps these shocks and is transmitted in a weakened form to the supporting walls 8 of the building. Upon completion of the seismic impact, plate 3 returns the building to its original position. The horizontal components of the seismic shocks, also through plate 3, are perceived by vertical columns 2, causing their upper part to deviate from

vertical position. This deviation is prevented by the bulk material 6 filling the pit. After the end of the seismic impact, the building thanks to the elasticity of the vertical uprights 2 and plate 3 returns to its original position. Filling the pit with bulk material C and making the walls of the pit and the side walls of the support shoes 7 inclined to the horizon at an angle equal to

the angle of seismic stability of bulk material, contribute to the rapid attenuation of seismic vibrations. Plate 3 can be made in the form of a highly reinforced thin reinforced concrete structure, but it can be metal; its thickness depends on the mass of the building and is determined by calculation. Cutting the slab 3 into sectors improves its operation and enhances the dynamic qualities of the foundation in cent.

Claims (1)

The invention allows halving the metal consumption and the cost of buildings in areas of high seismicity. Invention Formula Earthquake-proof building foundation, including upper and lower support blocks and vertical rods placed between them, the ends of which are rigidly connected to the corresponding support blocks, characterized in that, in order to increase the stability of the building when perceiving vertical seismic impacts, the upper support block is made with a flexible horizontal slab of Their sectors are about the plan and are coaxially mounted on the plate of enclosed in plan external and internal bearing elements. FIG. g