Strong aftershocks have the potential to further aggravate the damage state of structures, and much less attention has been given to the seismic vulnerability of high‐rise buildings than that of low‐ to medium‐rise buildings. This study assesses the seismic vulnerability of a 32‐storey frame–core tube building by performing the incremental dynamic analysis on the material‐based three‐dimensional numerical model. A storey damage model based on the material damage is developed using the weighted average method. Eighteen recorded mainshock–aftershock sequences, whose mainshock records match the target spectrum, are selected. The results indicate that the developed stroey damage model can effectively reflect the additional damage induced by aftershocks. Strong aftershocks have high potential to change the location of weak storeys. Notably, shifts of weak storeys are observed in more than 30% of aftershocks with relative spectral acceleration of 0.8. As the mainshock‐induced damage state becomes more severe, the mainshock‐damaged building becomes increasingly fragile to the aftershock excitation and more sensitive to aftershock intensities. The probability of exceeding severe damage state increases from 35.3% to 62.1% due to the effects of strong aftershocks. The results in this study can provide supports to the seismic resilience assessment of this high‐rise building.

中文翻译：

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经历主震-余震序列的高层建筑的脆弱性评估

强烈的余震可能会进一步加剧建筑物的破坏状态，与中低层建筑相比，高层建筑的地震易损性受到的关注要少得多。本研究通过对基于材料的三维数值模型进行增量动力分析，评估了32层框架芯管建筑的地震脆弱性。使用加权平均法建立了基于材料损坏的楼层损坏模型。选择了18条记录的主震-余震序列，其主震记录与目标频谱相匹配。结果表明，改进的星型损伤模型可以有效地反映余震引起的附加损伤。强余震具有改变弱层位置的巨大潜力。值得注意的是 在超过30％的余震中观察到了弱层的位移，相对光谱加速度为0.8。随着主震引起的破坏状态变得越来越严重，主震破坏的建筑物对于余震激发变得越来越脆弱，并且对余震强度越来越敏感。由于强烈余震的影响，超过严重破坏状态的可能性从35.3％增加到62.1％。这项研究的结果可为该高层建筑的抗震能力评估提供支持。由于强烈余震的影响，超过严重破坏状态的可能性从35.3％增加到62.1％。这项研究的结果可为该高层建筑的抗震能力评估提供支持。由于强烈余震的影响，超过严重破坏状态的可能性从35.3％增加到62.1％。这项研究的结果可为该高层建筑的抗震能力评估提供支持。