Abstract
Based on the shortcoming of the passive friction damper that the friction force cannot be adjusted during working, a new type of piezoelectric variable friction damper that the friction force can be adjusted by piezoelectric actuator was developed. The energy dissipation capacity of the damper under cyclic loading was investigated by Material Testing System. The energy dissipation performance of the damper was also analyzed by the preload, loading frequency and displacement amplitude. The experimental results indicate that the proposed piezoelectric variable friction damper has both stable hysteretic performance and good energy dissipation capacity. The energy performance of the damper varies with preload and excitation amplitude. The excitation frequency has little effect on the energy dissipation of the proposed piezoelectric variable friction damper.
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