SMA-piezoelectric frictional combined damper

Abstract

The invention provides an SMA-piezoelectric frictional combined damper, and belongs to the field of damping control of engineering structures. The damper mainly comprises a quadrate housing, a friction plate, a sliding plate, a force sensor, a sliding shaft, a pre-tensioning bolt, a shape memory alloy wire, a piezoelectric ceramic driver and a connecting fixing bolt. The damper is characterized in that a plurality of frictional sheets are provided to combine the SMA damper with a frictional damper, and the energy consumption effect is obvious; the voltage applied to the piezoelectric ceramic driver is adjusted to change the sliding frictional force on real time so as to meet the energy consumption requirement of earthquake at different strength; two ends of the friction plate are pre-propped through arc-shaped head bolts, and thus the friction plate can transversely move; the sliding plate is fastened on the connecting plate through a vertical bolt; a transverse mini chute is formed in the connecting plate, so that the sliding plate can conveniently transversely move; the damper is simple to mount; a large amount of connecting parts can be saved; the self-returning effect of part of the damper can be achieved; a herringbone or inclined support can be utilized to connect to a building structure; the damper is applied to the field of damping control of the engineering structures.

Description

technical field [0001] The invention belongs to the field of engineering structure damping control, and relates to a damping control device, in particular to an SMA-piezoelectric friction composite damper that can inhibit the structural vibration response of engineering structures under earthquake action. Background technique [0002] Friction damper is a kind of control device that uses the frictional energy consumption of the friction surface to dissipate vibration energy. It has simple structure, convenient installation, good energy consumption, and its performance is not affected by temperature. Can shock absorber. However, the traditional friction damper only has a single friction surface, and the energy dissipation effect is not significant. In practical applications, a large number of connecting parts are required. Moreover, the traditional friction damper itself has no self-resetting ability, and can only rely on the stiffness of the structure itself to reset. The l...

AI Technical Summary

Problems solved by technology

However, the traditional friction damper only has a single friction surface, and the energy dissipation effect is not significant. In practical applications, a large number of connecting parts are required. Moreover, the traditional friction damper itself has no self-resetting ability, and can only rely on the stiffness of the structure itself to reset. The locking force often cannot meet the energy dissipation requirements of earthquakes of different intensities

Due to the influence of bolt stress relaxation, the locking force may change during the service cycle, so there are many restrictions in engineering applications

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