期刊
FRONTIERS OF ENGINEERING MANAGEMENT
卷 8, 期 1, 页码 122-134出版社
HIGHER EDUCATION PRESS
DOI: 10.1007/s42524-019-0072-x
关键词
regional seismic damage prediction; city-scale nonlinear time-history analysis; mainshock-aftershock sequence; multiple degree-of-freedom (MDOF) model; 2014 Ludian earthquake
资金
- National Key RD Program [2018YFC1504401]
- National Natural Science Foundation of China [51778341]
This study proposes a framework for predicting regional seismic damage of buildings under a mainshock-aftershock (MS-AS) sequence using city-scale nonlinear time-history analysis (THA). The proposed method can reasonably predict and generate MS-AS sequences, providing a useful reference for earthquake emergency response and scientific decision making.
Strong aftershocks generally occur following a significant earthquake. Aftershocks further damage buildings weakened by mainshocks. Thus, the accurate and efficient prediction of aftershock-induced damage to buildings on a regional scale is crucial for decision making for post-earthquake rescue and emergency response. A framework to predict regional seismic damage of buildings under a mainshock-aftershock (MS-AS) sequence is proposed in this study based on city-scale nonlinear time-history analysis (THA). Specifically, an MS-AS sequence-generation method is proposed to generate a potential MS-AS sequence that can account for the amplification, spectrum, duration, magnitude, and site condition of a target area. Moreover, city-scale nonlinear THA is adopted to predict building seismic damage subjected to MS-AS sequences. The accuracy and reliability of city-scale nonlinear THA for an MS-AS sequence are validated by as-recorded seismic responses of buildings and simulation results in published literature. The town of Longtoushan, which was damaged during the Ludian earthquake, is used as a case study to illustrate the detailed procedure and advantages of the proposed framework. The primary conclusions are as follows. (1) Regional seismic damage of buildings under an MS-AS sequence can be predicted reasonably and accurately by city-scale nonlinear THA. (2) An MS-AS sequence can be generated reasonably by the proposed MS-AS sequence-generation method. (3) Regional seismic damage of buildings under different MS-AS scenarios can be provided efficiently by the proposed framework, which in turn can provide a useful reference for earthquake emergency response and scientific decision making for earthquake disaster relief.
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