Impact of Earthquake Types and Aftershocks on Loss Assessment of Non-Code-Conforming Buildings: Case Study with Victoria, British Columbia
Impact of Earthquake Types and Aftershocks on Loss Assessment of Non-Code-Conforming Buildings: Case Study with Victoria, British Columbia
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地震类型和余震对不符合规范的建筑物损失评估的影响：不列颠哥伦比亚省维多利亚市的案例研究
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
K. Goda
中科院分区：
文献类型：
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作者：
S. Tesfamariam;K. Goda
本文研究了地震类型（浅层地震、深层板状地震和巨型逆冲卡斯卡迪亚界面地震）和余震对不符合规范的钢筋混凝土（RC）建筑物损失评估的影响。损失评估是在基于性能的地震工程框架内制定的。使用联结函数捕获最大层间漂移比和剩余层间漂移比之间的相关性。采用考虑非延性钢筋混凝土框架关键滞后特性的有限元模型，并利用增量动态分析来计算倒塌风险。拟议的程序适用于位于加拿大不列颠哥伦比亚省维多利亚的一组 2 层、4 层、8 层和 12 层非延性钢筋混凝土框架。从结果来看，2层楼房的余震表现出明显的差异。年概率为 10−2–10−3 时，Mw6.5 至 Mw7.5 的地壳和板片事件对损失的贡献最大，因为这些事件发生的频率更高。在 10−3–10−4 的罕见年概率中，Mw8.5 至 Mw9.0 的卡斯卡迪亚事件占主导地位，对损失造成的影响最大。
This paper presents a study on the impact of earthquake types (shallow crustal, deep inslab, and megathrust Cascadia interface earthquakes) and aftershocks on loss assessment of non-code-conforming reinforced concrete (RC) buildings. The loss assessment is formulated within the performance-based earthquake engineering framework. The dependency between the maximum and residual inter-story drift ratios are captured using copulas. Finite-element models that take into account key hysteretic characteristics of non-ductile RC frames were adopted and incremental dynamic analysis is utilized to compute collapse risk. The proposed procedure is applied to a set of 2-, 4-, 8-, and 12-story non-ductile reinforced concrete frames located in Victoria, British Columbia, Canada. From the results, the aftershock showed marked difference for the 2-story building. At annual probability of 10−2–10−3, crustal and inslab events with Mw6.5 to Mw7.5 contributed the most to the loss as these events occur more frequently. At rarer annual probability of 10−3–10−4, the Cascadia event having Mw8.5 to Mw9.0 is predominant and contributed the most to the loss.