Friction pendulum isolation bearing with variable curvature

Abstract

The invention discloses a friction pendulum isolation bearing with a variable curvature. The friction pendulum isolation bearing comprises a bottom supporting slide seat, a top supporting slide seat arranged above the bottom supporting slide seat and a slider assembly, wherein the slider assembly is arranged between the bottom supporting slide seat and the top supporting slide seat and used for glidingly connecting the bottom supporting slide seat and the top supporting slide seat, a first sliding surface which is recessed inwards and has the variable curvature is formed on the upper surface of the bottom supporting slide seat, and the slider assembly is arranged in the first sliding surface. The friction pendulum isolation bearing with the variable curvature has a remarkable isolation effect, facilitates improvement of safety level of an isolation structure and can better avoid sympathetic vibration.

Description

technical field [0001] The invention belongs to the technical field of shock absorption and isolation of building structures, and in particular relates to a variable curvature friction pendulum shock isolation support. Background technique [0002] Seismic isolation technology is an outstanding research achievement in the field of anti-seismic structures in the past 50 years, and has been widely used in my country. Among them, the friction pendulum isolation bearing is a new seismic isolation technology. The horizontal stiffness of the friction pendulum isolation bearing is directly proportional to the self-weight of the superstructure, and the natural vibration period of the structure has nothing to do with its own mass. At the same time, the rigid center of the structure coincides with the center of mass automatically, and is less affected by torsion. Compared with traditional rubber bearings, friction pendulum isolation bearings have greater horizontal deformation capacit...

AI Technical Summary

Problems solved by technology

[0003] The failure modes of seismically isolated buildings and seismically isolated bridges under earthquakes are clear, and they are easy to be damaged due to excessive deformation of the seismic isolation layer under earthquakes beyond the design, and the redundancy is low

Due to the constant curvature of the track, the ordinary friction pendulum isolation bearing provides the same horizontal stiffness of the isolation layer, and there is no obvious difference in performance under earthquakes of different intensities. special consideration

In addition, the constant stiffness of the isolation layer is likely to cause low-frequency resonance in near-fault earthquakes, which is not conducive to the safety of the isolation structure.

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