Abstract
The experimental results of SMA-based negative stiffness isolation device show that the SMA cables arranged around the bearing cannot slide freely. To solve this problem, an optimized SMA-based negative stiffness isolation device was proposed. Based on a continuous bridge, the seismic performance of positive stiffness, zero stiffness and negative stiffness devices is compared. The results show that the device has good energy dissipation capacity, re-centering capability and displacement-limiting capacity. Furthermore, the seismic performance of the device with stiffness is better than the device with positive or zero stiffness.
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