SU1747607A1 - Foundation of earthquake-proof building - Google Patents

Description

The purpose of the invention is to improve the reliability of the foundation by ensuring smooth damping of vibrations.

The goal is achieved by the fact that the foundation of an earthquake-resistant building, including the upper and lower optic blocks, and a stand placed between them from longitudinally movable parts, between which a damping device is installed, is equipped with a cylindrical spring sequentially arranged around the stand and a downwardly expanding conical spring and a membrane, the upper and lower ends of which are fixed on the corresponding support blocks.

 The damping element can be made in the form of a cylinder with a piston abutting against an elastic material, for example a cord network.

On the lateral surface between the G-shaped shoulders and the support plate console is a membrane shell (for example, made of fiberglass).

FIG. 1 shows the foundation for a column, plan; in fig. 2 is a section A-A in FIG. 1; in fig. 3 - deforming element, section.

The proposed seismic foundation for the column includes a base plate 1 with a cup 2, an annular groove 3 and a cone part 4, supported by preparation 5 and a soil base 6. In the annular groove 3 a taper spring 7 is placed, tapering upwards, and in a glass 2 cylindrical spring 8. Glass 2 and annular groove 3 are embedded in concrete 9.

The glass 10 under the column has an outer shoulder 11 of the L-shaped profile around the perimeter, in the annular groove 12 of which a conical spring 7 rests against the upper end. In the bottom of the glass 10 there is a cavity 13 facing the base plate 1. To the shoulders 11 around the perimeter of the glass 10 and to the console 4 of the support plate 1 is connected a membrane 14 in the form of a conical shell (for example, from fiberglass). A damping post 15, hinged in the bottoms of the cups 2 and 10, and consisting of the body 16, the hinge element 17, the fixing part 18, the piston 19 and the elastic material 20 (for example, rubber, reinforced with nets) is installed inside the cylindrical spring.

In the glass 10 install the column 21 and monolithic it with concrete 9.

After the construction of the above-ground part of the building, the structures 14 are connected to the shoulders 11 along the perimeter of the glass 10 under the column and to the console 4 of the base plate 1, and the backfilling with soil is carried out

Dynamic seismic performance

the foundation for the column is carried out as follows.

During a seismic impact on a building, a structure can occur separately or in combinations in different directions and modes of horizontal and vertical ground vibrations of the base.

Springs and damping element

The calculated degree of mobility in the axes x, y, z is preset taking into account the magnitude of the earthquake, which can be tested with sufficient accuracy on a test bench with a full-scale sample.

foundation, and also checked the smoothness in damping oscillations and returning it to its original position.

The proposed foundation is able to perceive both horizontal and

vertical loads from earthquakes by compressing the springs and the possibility of their axial displacement in place of the bearing and on them the glass under the column.

In the case of large eccentrically applied operational loads, stringing beams are installed on the grid of columns with support on the top of the glass under the column (conventionally not shown), in the glasses of which the columns are trapped.

The proposed seismic foundation for the column has the following advantages.

The foundation is able to provide smooth damping of oscillations, since it will take the initial position of the seismic effect. The foundation perceives horizontal and vertical ground vibrations of the base during seismic effects due to elastic deformation

springs capable of fully self-repair. The damping element, perceived part of the static load from the building, is only put into operation when seismic vibrations occur. This

makes the building frame system insensitive to minor fluctuations from the passage of vehicles, etc. For the invention The foundation of earthquake-resistant buildings,

including upper and lower support blocks and a stand arranged between them from longitudinally movable parts between which a damping device is installed, characterized by

in order to increase reliability

of the foundation, it is provided with a coil spring arranged successively around the pillar and extending downwards

conical springs and diaphragms, the upper and lower ends of which are fixed on the corresponding support blocks.

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Claims (1)

Formula of the invention The foundation of an earthquake-resistant building, 55 including the upper and lower support blocks and a rack placed between them from longitudinally movable parts, between which a damping device is installed, characterized in that, in order to increase the reliability of the foundation, it is equipped sequentially conical springs and diaphragms placed around the rack with a cylindrical spring and expanding downward, the upper and lower ends of which are fixed to the corresponding support blocks. tg 7 5 5 FIG. 2