Earthquake-proof foundation (options)

 

(57) Abstract:

The Foundation includes upper and lower bearing parts. Each supporting part is made in the form of a plate or series of plates arranged with a clearance in the horizontal plane. The adjacent surfaces of plates bearing parts have a hemispherical notch located at the vertices of an equilateral triangle. Between adjacent hemispherical hollows are supporting the movable elements in the form of balls, the radius of which is smaller than the radius of the hemispherical recesses. Between base plates around their perimeter installed hydraulic dampers in the amount of not less than three, arranged so that their longitudinal axes do not intersect at a single point in the vertical plane. 2 S. p. f-crystals, 5 Il.

The invention relates to civil, industrial and agricultural construction and can be used in the construction of buildings and buildings constructed in areas with high seismic activity on pile foundations, and the foundations on natural basis.

Known seismic Foundation, comprising upper and lower base plate, between which the upper and lower bearing parts, A liquid, supporting the movable elements in the form of balls located between adjacent hemispherical hollows and immersed in a viscous liquid, and the radius of the balls is smaller than the radius of the hemispherical grooves (ed.St. USSR N 607890, CL E 02 D 27/34, 1976).

Also known earthquake resistant Foundation that contains upper and lower base plate, between which the upper and lower bearing part adjacent the surfaces of which have three hemispherical recesses, arranged in a single row, bearing movable elements in the form of balls located between adjacent hemispherical hollows, and the radius of the balls is smaller than the radius of the hemispherical grooves, and damping elements made in the form of linings of friction material and mounted on the adjacent horizontal surfaces of the upper and lower bearing parts (ed.St. USSR N 920115,CL E 02 D 27/34, 1976). However, the known foundations do not allow sufficiently to damp resonant vibrations of the Foundation in a horizontal plane, arising from seismic tremors.

The essence of the invention lies in the fact that to ensure more effective damping of resonance oscillations of the Foundation in the horizontal plane EA account transformations Gori is amentia plate, between which are located the upper and lower bearing part adjacent the surfaces of which have a hemispherical recess, a support movable elements are in the form of a ball located between adjacent hemispherical hollows, and the radius of the balls is smaller than the radius of the hemispherical grooves and damping elements, the difference is that the upper and lower bearing parts are made each in the form of a plate, polyfoniska grooves for the balls are located at the vertices of an equilateral triangle, and as damping elements mounted hydraulic dampers and are located between base plates around their perimeter in the amount of not less than three so that their longitudinal axes do not intersect at a single point in the vertical plane.

Embodiment of the claimed aseismic Foundation differs in that the upper and lower bearing parts are made each in the form of a series of plates arranged with a clearance in the horizontal plane, on each of which a hemispherical recesses for the balls are located at the vertices of an equilateral triangle, and as damping elements mounted hydraulic dampers and are located between base plates around their perimeter in an amount not m the>

The invention is illustrated by drawings: Fig.l embodiment of earthquake resistant Foundation with basic parts, made in the form of one plate each; Fig.2 section a-a in Fig.1; Fig.3 the Foundation under the action of seismic shock; Fig.4 embodiment of earthquake resistant Foundation with the support portions in the form of a series of plates each; Fig.5 cross-section B-B in Fig.4.

Earthquake resistant Foundation contains the upper base plate 1 and the lower base plate 2 adjacent the upper bearing part 3 and the lower supporting part 4 made in the form of one plate each, or a number of plates arranged with a clearance in the horizontal plane adjacent the surfaces of which have a hemispherical recesses 5, located at the vertices of an equilateral triangle. Between adjacent hemispherical grooves 5 are supporting the movable elements in the form of balls 6, the radius of which is smaller than the radius of the hemispherical grooves 5. Between the base plates 1 and 2 on their perimeter of the installed hydraulic dampers 7 in the amount of not less than three, which are arranged so that their longitudinal axes do not intersect at a single point in the vertical plane. The damper 7 is attached to the lower base plate 2 by means of lugs 8.

After completing the motion of the lower support part 4 with the lower base plate 2 to the axis of the hemispherical grooves 5 and the axis of the balls 6 are offset from the axis of the ball. The pitched part of the load from the mass of the building occurs at the same time, acts in the direction opposite to the direction of action of the horizontal component of the seismic load. Under the influence of the sloped part of the building mass upper bearing part 3 together with the building begins accelerated motion on the surface of the hemispherical recesses in the opposite direction. The coincidence at this point, the direction of impact of the new seismic shock to the direction of rolling resonant vibrations occur. To exclude Rezonansi support part 3 of the Foundation of the resistance of the damper 7 movement in a horizontal plane maximum, when lifting a minimum.

The location of the balls on the vertices of an equilateral triangle allows you to evenly distribute the vertical and horizontal loads on each ball 6.

The execution of the bearing parts 3 and 4 in the form of a series of plates allows us to perceive the Foundation of any magnitude and direction of the load.

Placement of the dampers 7 in the amount of not less than three on the Foundation makes it possible to damp the resonant vibrations in the horizontal plane in any direction. For damping torsional vibrations in the longitudinal axis of the dampers 7 must not intersect at a single point in the vertical plane.

1. Earthquake resistant Foundation that contains upper and lower base piety, between which are located the upper and lower bearing part adjacent the surfaces of which have a hemispherical recess, a support movable elements are in the form of balls located between adjacent hemispherical hollows, and the radius of the balls is smaller than the radius of the hemispherical grooves, and damping elements, wherein the upper and lower bearing parts are made each in the form of a plate, hemispherical recess with the balls located at the vertices of an equilateral triangle, and the quality is on their perimeter not less than three so that that their longitudinal axes do not intersect at a single point in the vertical plane.

2. Earthquake resistant Foundation that contains upper and lower base plate, between which the upper and lower bearing part adjacent the surfaces of which have a hemispherical recess, a support movable elements are in the form of balls located between adjacent hemispherical hollows, and the radius of the balls is smaller than the radius of the hemispherical grooves, and damping elements, wherein the upper and lower bearing parts are made each in the form of a series of plates arranged with a clearance in the horizontal plane, each with a hemispherical recess with the balls located at the vertices of equilateral triangles, and as damping elements mounted hydraulic dampers and are located between base plates around their perimeter not less than three so that their longitudinal axes do not intersect at a single point in the vertical plane.

 

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