Damage may accumulate in structures that are exposed to multiple earthquakes, mitigating their ability to withstand after future ground shaking. Several recent studies have focused on improving the post-earthquake functionality of structures by using re-centering devices or materials. Superelastic shape memory alloy (SE-SMA) material has received considerable attention from the seismic community. However, the extensive cost of SE-SMA as reinforcement restricts its commercial use. This paper aims first to introduce a new hybrid plastic hinge (HPH), which combines the steel and SE-SMA bars within the critical sections to reduce construction costs and enhance the seismic performance of reinforced concrete (RC) frame buildings. The HPH RC buildings are comprehensively evaluated under sequence ground motions. Results showed superior seismic performance of the HPH RC buildings when compared to the conventional SE-SMA system, which was fully reinforced by the SE-SMA bars in critical sections.

As part of this ongoing investigation, an approximate method proposed by FEMA P-58 (2018) to estimate residual drift demands were discussed.

损坏可能会在遭受多次地震的建筑物中累积，从而降低其在未来地面震动后的承受能力。最近的一些研究集中在通过使用重新定心设备或材料来改善结构的震后功能。超弹性形状记忆合金（SE-SMA）材料已引起地震界的极大关注。但是，SE-SMA作为增强材料的昂贵成本限制了其商业用途。本文首先旨在介绍一种新型混合塑料铰链（HPH），该铰链在关键区域内结合了钢杆和SE-SMA钢筋，从而降低了建筑成本并增强了钢筋混凝土（RC）框架建筑物的抗震性能。HPH RC建筑物在顺序地面运动下得到了全面评估。

作为这项正在进行的研究的一部分，讨论了FEMA P-58（2018）提出的一种估计剩余漂移需求的近似方法。