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Emergency seismic damage assessment of the M_S8.0 Great Wenchuan Earthquake Based on Remote Sensing Imagery

Earthquake Research in China 2009年第2期23卷 134-143页

作者： Wang Xiaoqing Wang Long Wang Yan Ding Xiang Zhang Feiyu Institute of Earthquake Science China Earthquake Administration Beijing 100036 China

The fast processing, seismic damage data extraction and loss evaluation from RS imagery acquired immediately after a destructive earthquake occurs, are important means for compen- sating the insufficiency of seismic damage information from ground-based investigations and provide an important basis for emergency command and rescue. The paper introduces the method of emergency seismic damage assessment using remote sensing data and its application to the great Wenchuan earthquake of magnitude 8.0 occurring in southwest Sichuan Province on May 12, 2008. The practical effectiveness of the method is also evaluated in the paper.

关键词： Remote sensing Earthquake emergency response Wenchuan earthquake seismic damage assessment

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Pushover analysis of underground structures:Method and application

引用

Science China(Technological Sciences) 2014年第2期57卷 423-437页

作者： LIU JingBo WANG WenHui DASGUPTA Gautam Institute Department of Civil Engineering Tsinghua University Department of Civil Engineering and Engineering Mechanics Columbia UniversityNew York NY 10027 USA

Pushover analysis is common because of its conceptual simplicity and computational attractiveness in computing seismic *** that traditional pushover analysis is restricted in underground structures due to the stark differences in the seismic response characteristics of surface structures,this paper proposes a pushover analysis method for underground structures and its application in seismic damage ***,three types of force distribution are presented based on ground response ***,the target displacements and analysis models are established according to force-based and performance-based ***,the pushover analysis procedure for underground structures is ***,the applicability of pushover analysis to underground structures is verified by comparing the responses of a Chongwenmen subway station determined by the proposed procedure and by nonlinear response history *** addition,two other points are made:that the inverted triangular distribution of effective earthquake acceleration is more practical than the other two distributions,and that performance-based design is more effective than force-based ***,a cyclic reversal loading pattern based on one cycle of reversal loads as an earthquake event is presented and applied to the seismic damage assessment of underground *** results show that the proposed pushover analysis can be effectively applied to the seismic design and damage assessment of underground structures.

关键词： underground structure pushover analysis seismic demand seismic damage assessment

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