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Shows enhanced lateral load-capacity in precast concrete structures, suggesting improved safety during earthquakes.
This study introduces a novel retrofitting device for seismically deficient precast concrete structures, termed Shape Memory Alloy Partial Moment Transfer (SMA-PMT) device. The device is designed to introduce partial moment transfer in friction-type beam-column joints, enabling partial frame action and enhancing the lateral load-capacity. Representative SMA-PMT and joint design was developed using SAP2000, based on which three joint specimens equipped with SMA-PMT were fabricated and tested under cyclic and pseudo-dynamic (quasi-static) loading. The results confirmed effective moment transfer, while the upgraded joints exhibited stable hysteretic response, progressive energy dissipation, considerable self-centering ability, and experimental capacity that exceeded predictions by 22%.
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Chen et al. (2026) studied this question.
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