A review and comparative study on the performance of self-centering damping devices based on SMA

Shape memory alloy (SMA)-based self-centering damping devices represent a significant advancement in structural engineering, offering enhanced performance in seismic resilience through innovative self-centering capabilities. This study provides a comprehensive review of the current research developments, classifications, and performance evaluations of these devices. Initially, it introduces the fundamental properties of SMA materials and their deployment mechanisms in self-centering dampers. The study categorizes the devices into four primary types tension, shear, rotary, and isolation bearing types, each summarized with their respective working principles and essential design criteria. Furthermore, this review explores design strategies aimed at enhancing energy dissipation and self-centering capacity. The study proposes a novel performance evaluation metric, the "co-optimization coefficient of energy dissipation capacity and self-centering capacity. This metric provides a consistent standard for comparing different configurations, improving the design optimization process. The effectiveness of this new index is proven through detailed calculations and analysis, emphasizing its potential to advance self-centering damping technology and contribute to the development of more durable structural systems.