Seismic protection the foundation of a building

 

(57) Abstract:

Usage: construction of buildings in seismic zones for earthquake-resistant foundations. The inventive anti-seismic Foundation of a building includes a stationary base plate 1 with a spherical recess 2 in the upper part mounted therein concentric with the cap 3 building 4, the bottom surface of which is made spherical, the filler between the base plate 1 and the base 3. The filler is made in the form of a cage with the balls 5. The stationary base plate 1 consists of two parts, connected by a movable through a vertical cylinders. The cylinders are communicated to the pipeline Assembly with parallel connected inductors and check valves with gethydrocodone.info. The center of the spherical recess 3 of the base plate 1 and the spherical surface of the cap 3 is located above the center of gravity of the structure by the following value: , where Io- moment of inertia of the structure, kg/m2, m is the mass of buildings, kg the Period of oscillations of structures relative to the center of the sphere 2 base plate 1 to define according to: , where g is the acceleration of gravity, m/s2. The period of natural oscillations does not exceed Velich is mulatero, device management in the form of the distribution pipeline with valve, Samobranka and o-ring installed in the Central part of the spherical recess of a base plate. Limited ring cavity communicated with the block getaccelerator through the distribution pipeline. The radii of the spherical recess 2 of the base plate 1 and the spherical surface of the cap 3 is made equal. The Foundation provided an additional unit of getaccelerator, device management in the form of piping with valves assembled with the valve members in contact with the spherical surface of the cap. The surface plate 1 is made with an extensive network of capillary grooves. Grooves are connected with pipelines, indicating the space between the plate 1 and the base 3 with the additional block getaccelerator. Valves installed in the nodes of branching capillaries. 3 C.p. f-crystals, 3 ill.

The invention relates to the construction, namely the construction of buildings in seismic zones for earthquake-resistant foundations.

Known anti-seismic building including the Foundation and advancement design, seismic isolation between which is placed the item [1]

The disadvantage of this soo is the instruction.

Closest to the proposed to the technical nature of seismic protection is the Foundation of a building, comprising a stationary base plate with a spherical recess in the upper part mounted therein concentric with the base of the building, the lower surface of which is made spherical, the filler between the base plate and the base [2]

A disadvantage of the known device is that it has not increased protection from earthquakes, because of the large friction force between the structural elements and low reliability of the connection base plate with base, because the small area of contact.

The purpose of the invention improve the seismic performance of buildings, reduce friction, improve reliability of the connection base plate with the base.

This goal is achieved by the fact that seismic protection the Foundation of a building, comprising a stationary base plate with a spherical recess in the upper part mounted therein concentric with the base of the building, the lower surface of which is made spherical, the filler between the base plate and the cap has a placeholder made in the form of a cage with balls, and the fixed base plennik piping Assembly with parallel connected inductors and check valves with gethydrocodone.info, thus, the center of the spherical recess of a base plate and a spherical surface of the cap is located above the center of gravity of the structure by the following value:

< / BR>
where: Iothe moment of inertia of the structure, kg/m2,

m the mass of buildings, kg,

and the period of oscillations of structures relative to the center of the sphere base plate to define dependencies:

< / BR>
where: g is the acceleration of gravity, m/s2,

during this period of natural oscillations does not exceed the minimum period seismic areas. The Foundation provided by the block getaccelerator, device management in the form of the distribution pipeline with valve, Samobranka and o-ring installed in the Central part of the spherical recess of a base plate, and bounded by the ring cavity communicated with the block getaccelerator through the distribution pipeline. The radii of the spherical recess of a base plate and a spherical surface of the cap is made equal, and the Foundation provided additional block getaccelerator, device management in the form of piping with valves assembled with the valve members in contact with the spherical surface C indicating the space between the plate and the base with an additional block getaccelerator, valves installed in the nodes of branching capillaries.

In Fig.1 shows a General view of the building with seismic protection Foundation, in Fig.2 fragment sammasambuddha Foundation; Fig. 3 seismic protection Foundation with its controls.

Earthquake resistant Foundation of a building includes a stationary base plate 1 with a spherical recess 2 and the upper part, in which is mounted a concentric cap 3 building 4. The bottom surface of the cap 3 is made spherical. Between base plate 1 and the base 3 is mounted antifriction filler in the form of a cage with the balls 5. The stationary base plate 1 consists of two parts, connected by a movable through a vertical cylinder 6. The cylinders 6 indicated by the line 7 in Assembly with parallel connected inductors 8 and a non-return valve 9 gethydrocodone.info 10. The center of the spherical recess 2 of the base plate 1 (Fig.1) and the spherical surface of the cap 3 is located above the center of gravity of the structure by the following value:

< / BR>
where: Iothe moment of inertia of the structure, kg/m2,

m the mass of the structure, kgs.

The period of oscillations of structures relative to the center of the sphere base plate obstvennik fluctuations does not exceed the minimum period seismic areas. Earthquake resistant Foundation provided by the block getaccelerator 11 device management in the form of the distribution pipe 12 with the valve 13. It is equipped with Samobranka 14 and the sealing ring 15 mounted in the Central part of the spherical recess 2 of the base plate 1. Limited ring cavity 15 communicates with the block getaccelerator 11 through the distribution pipeline 16. The radii of the spherical recess 2 of the base plate 1 and the spherical surface of the cap 3 is made equal. The Foundation provided an additional unit of getaccelerator (Fig. not shown), device management in the form of piping with valves assembled with the valve members in contact with the spherical surface of the cap 3. The surface plate 1 is made with an extensive network of capillary grooves which are connected with pipelines, reporting prostranstvo between the plate 1 and the base 3 with the additional block getaccelerator. Valves installed in the nodes of branching capillaries.

Seismic protection Foundation construction works as follows.

Seismic wave, propagating waves deform the soil with the period of oscillation Twiththat has some meaning to the od vibrations of Tmin. The building is designed and built in compliance with the conditions: TcTmin.

Base plate 1 does angular oscillations in time of the earthquake, and the building-base", rising and falling retains its vertical position due to the presence of the cage with the balls 5 in the gap between the spherical recess 2 of the plate 1 and a spherical surface of the cap 3. The vertical position is maintained also when passing under the building 4 different directions of incident and reflected seismic waves, thus the constructive elements of the building 4 is not exposed to bending moments and destructive side impacts of concentrated masses. Vertical vibrations of the building are mitigated by the hydraulic cylinders 6.

During an earthquake, the building rises rapidly, the pistons of the hydraulic cylinders 6 squeeze out the liquid, the pipe 7 through the throttles 8, which penetrates into the camera gatheraccurate 10, check valve 9 while locked. Due to the spring property of the hydraulic system the amplitude of the elevation decreases. When lowering of the building (in the limiting case, when Twiththe minimum and the building does free fall) decreases the pressure of the piston on the fluid, which under the action of Saratoga not disconnected. Upon termination tremors pistons displace fluid through the choke 8 (valves 9 locked) back in gathercast 10.

When the tremors triggered seismogenic 14, which opens the valve 13 on the distribution pipe 12 and the compressed air from the unit getaccelerator 11 through the pipeline 16 fills bounded by a ring 15 of the cavity between the plate 1 and the base 3, partially compensating for the weight of the building 4 and reducing the force of rolling friction of the balls 5. The effect is enhanced by an extensive network of capillary grooves on the surface of the plate 1. When the relative displacement of the spherical surfaces of the plates 1 and cap 3 trigger spool valve device control block getaccelerator. Valves installed in the nodes of branching capillaries and firing their spools prevents the emission of air in the atmosphere through these branches. After the earthquake handle spools of valves installed in its original position and the cylinders of getaccelerator refuel with compressed air.

The proposed device has a high seismic resistance, reliability, allowing large-scale it to use in areas of high seismicity.

2. The Foundation under item 1, characterized in that the filler is made in the form of a cage with balls.

3. Fu is he equipped with a block getaccelerator, device management in the form of the distribution pipeline with valve, Samobranka and o-ring installed in the Central part of the spherical recess of a base plate, and bounded by the ring cavity communicated with the block getaccelerator through the distribution pipeline.

4. The Foundation for PM.1 to 3, characterized in that, with the aim of improving reliability of a base plate with base by increasing the area of contact, the radii of the spherical recess of a base plate and a spherical surface of the cap is made equal, and the Foundation provided by the block getaccelerator, device management in the form of pipelines with TV Assembly with the valve members in contact with the spherical surface of the cap, the surface of the plate is made with an extensive network of capillary grooves which are connected with pipelines, indicating the space between the plate and the base with an additional block getaccelerator, valves installed in the nodes of branching capillaries.

 

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