原文传递
Impact of Sequential Ground Motion Pairing on Mainshock-Aftershock Structural Response and Collapse Performance Assessment
| 题名： | Impact of Sequential Ground Motion Pairing on Mainshock-Aftershock Structural Response and Collapse Performance Assessment |
| 其他题名： | Abrahamson,N.,W.Silva,and R.Kamai.2013.Update of the AS08 ground-motion prediction equations based on the NGA-West2 data set.PEER Rep.2013/04.Berkeley,CA:Univ.of California,Berkeley. |
| 正文语种： | 英文 |
| 作者： | Mehrdad Shokrabadi |
| 关键词： | Sequential nonlinear dynamic analysis;Collapse risk;RC moment frames;Markov process;Story drift prediction equation |
| 摘要： | Earthquake engineers lack well-founded consensus guidelines for selecting ground motion time series for sequential mainshockaftershock events for use in seismic performance assessment. Past practice has seen sequences formed by coupling as-recorded mainshock and aftershock records and by using repeated mainshock records for both event types. Using mainshock-mainshock versus mainshock-aftershock record pairs, this paper assesses the structural performance of five ductile reinforced concrete frames with varying heights using sequential nonlinear response history analyses. Systematic differences are found in the frequency content of mainshock and aftershock records, which in turn produce expected differences in structural responses conditional on the dynamic characteristics of each structure. The outcome is measurable differences in the structural response, with mainshock-mainshock sequences potentially overestimating or underestimating seismic demand and risk relative to the use of more-appropriate mainshock-aftershock record pairs. This finding holds true even when mainshockmainshock sequences are formed by preserving the magnitude and distance relationships between as-recorded mainshocks and aftershocks. The correlation between event terms of mainshock and aftershock ground motions recorded from the same sequence is found to have a significant impact on maximum story drift ratio. This paper provides recommendations for aftershock record selection that draw upon these results. |
| 出版年： | 2018 |
| 论文唯一标识： | P-26Y2018V144N10016 |
| 英文栏目名称： | ANNIVERSARY PAPERS |
| doi： | 10.1061/(ASCE)ST.1943-541X.0002170 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 144 |
| 期： | 10 |
| 页码： | 192-204 |
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