This study primarily investigates the seismic fragility of mainshock damaged self-centering (SC) hybrid precast walls in aftershocks, and the results are compared with equivalent conventional reinforced concrete (RC) walls. A 5-story case-study structure is selected and designed comparatively using SC walls and RC walls to resist all the lateral seismic forces for design requirements. Thereafter, nonlinear time history incremental dynamic analyses (IDA) are conducted for the two analytical wall models using 44 artificially constructed seismic sequences. In the first step, mainshock IDA analyses are performed followed by aftershock IDA analyses considering different mainshock damages on the considered wall models. Three mainshock damage levels relating to three distinct post-mainshock inter-story drift ratios are induced in both wall models. The IDA curves in terms of maximum inter-story drift and residual drift are produced and comparatively studied for both wall models at predefined mainshock damage levels. The results are investigated and compared regarding seismic collapse capacity, residual drift, and effects of the polarity of aftershocks. It indicates from the study that in a general sense, the SC walls and RC walls exhibit similar collapse capacities for both undamaged conditions (i.e., subjected to mainshock only) and damaged conditions (with distinct mainshock damage levels). However, SC walls are intrinsically designed with significantly reduced residual drifts (proved again in this study), which results in much less influence from the aftershock polarity as compared to RC walls.

本研究主要研究余震中主震损坏的自定心 (SC) 混合预制墙的地震脆性，并将结果与​​等效的常规钢筋混凝土 (RC) 墙进行比较。选择和设计了一个5层的案例研究结构，比较使用SC墙和RC墙来抵抗设计要求的所有横向地震力。此后，使用 44 个人工构建的地震序列对两个分析墙模型进行非线性时程增量动力分析 (IDA)。在第一步中，执行主震 IDA 分析，然后进行余震 IDA 分析，考虑对所考虑的墙模型的不同主震损坏。在两种墙模型中都引入了与三个不同的主震后层间漂移率相关的三个主震损坏水平。在预定义的主震损坏水平下，针对两种壁模型生成并比较研究了最大层间漂移和残余漂移方面的 IDA 曲线。研究和比较了地震坍塌能力、残余漂移和余震极性影响的结果。研究表明，在一般意义上，SC 墙和 RC 墙在未损坏条件（即仅受到主震）和损坏条件（具有不同的主震损坏级别）下表现出相似的倒塌能力。然而，SC 墙在本质上的设计具有显着减少的残余漂移（在本研究中再次证明），与 RC 墙相比，这导致余震极性的影响要小得多。