Roll shaft type metal shock-insulating supporting seat

Abstract

The invention relates to a roll shaft type metal shock-insulating supporting seat which is used for base shock insulation in house buildings. The roll shaft type metal shock-insulating supporting seat comprises an upper connection plate, a roll shaft, a roll shaft frame, a middle end plate, an L-shaped pull-resisting connection plate, a pretightening force base plate, a lower connection plate, friction type high-strength bolts and high-strength pull-resisting bolts. The roll shaft type metal shock-insulating supporting seat can be used as a base shock-insulating element to be applied to low-rise building structures, high-rise building structures and super high-rise building structures. When the earthquake action is too large, and the shock-insulating supporting seat is enabled to bear pull force, the L-shaped pull-resisting connection plate and the high-strength pull-resisting bolts play roles in pull resistance. Meanwhile, polyfluotetraethylene plates with extra-low friction coefficient slide between each other, and the roll shaft type metal shock-insulating supporting seat still can play the shock-insulating role when the roll shaft type metal shock-insulating supporting seat is pulled.

Description

(1) Technical field [0001] The invention belongs to the technical field of structural engineering shock isolation, and relates to a shock isolation bearing device which utilizes roller shaft rolling and polytetrafluoroethylene plate friction sliding to reduce earthquake input energy. (2) Background technology [0002] Base isolation technology is to artificially set a soft layer between the superstructure of the building and the foundation. When an earthquake strikes, the high-frequency components that play a leading role cannot pass through the soft layer and enter the superstructure, thereby protecting the superstructure. This soft layer is also known as shock-absorbing layer. Due to the seismic isolation effect of the seismic isolation layer, the structural response of the upper structure is only equivalent to 1 / 4-1 / 8 of that without isolation, which not only achieves the purpose of reducing the damage to the upper structure caused by the earthquake, but also improves the...

AI Technical Summary

Problems solved by technology

However, when the laminated rubber bearing is under tension, the steel plate no longer acts as a restraint, and the axial tensile stiffness of the laminated rubber bearing is greatly reduced. In high-rise buildings, due to the large aspect ratio of the structure, under earthquake The overturning action of the structure may cause the bearing to be in tension, and the tensile strength of the laminated rubber bearing is not high, so it is difficult to apply in high-rise buildings

[0004] The friction pendulum bearing uses the sliding of the slider in the smooth curved surface to play the role of shock isolation. The curved surface is generally made of polytetrafluoroethylene material with corrosion resistance and small friction coefficient. Due to the low friction force, the equivalent period of the friction pendulum structure is adopted. It can be extended a lot. At the same time, the concave surface of the curved surface faces upward, and the slider slides in the concave surface. During the movement, the structure is lifted, and part of the kinetic energy is converted into the potential energy of the structure, which gradually disappears as the earthquake action decreases, and finally the structure returns to its original position. Friction pendulum has been paid attention to in recent years, but there is also the problem of weak tensile strength. Under large displacement, the upper cover plate will be separated from the slider, which will cause the vibration isolation support to fail.

[0005] Regardless of the seismic isolation structure using laminated rubber bearings or friction pendulum bearings, because the bearings have low torsional stiffness, when designing the structure, the center of mass of the structure should be as close as possible to the center of stiffness of the isolation layer. In order to reduce the overall torsion of the structure during earthquakes, this feature also limits the application of seismic isolation bearings in special-shaped structures

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