TY - JOUR
T1 - Effects of near-fault seismic loadings on run-out of large-scale landslide
T2 - A case study
AU - Zhang, Yingbin
AU - Chen, Guangqi
AU - Zheng, Lu
AU - Li, Yange
AU - Wu, Jian
N1 - Funding Information:
This study has received financial support from the Global Environment Research Found of Japan (S-8) and from Grants-in-Aid for Scientific Research (Scientific Research (B) , 22310113 , G. Chen) from the Japan Society for the Promotion of Science . The financial support is gratefully acknowledged. We thank the Japan Aerospace Exploration Agency (JAXA) for the satellite image. And part data set is provided by the International Scientific & Technical Data Mirror Site, Computer Network Information Center, Chinese Academy of Sciences. We also thank the editor and two anonymous reviewers for their helpful and insightful comments.
Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013/11/8
Y1 - 2013/11/8
N2 - This study presents the run-out analysis of the Daguangbao landslides subjected to near-fault multi-direction earthquake forces using discontinuous deformation analysis (DDA). The Daguangbao landslide is the largest landslide induced by the 2008 Wenchuan earthquake. In order to investigate the effects of near-fault seismic force on landslide run-out, kinematic behavior of sliding mass is simulated by a dynamic discrete numerical analysis method called DDA. In this simulation, based on the shape of failure surface and the feature of slope geology, the whole slope is divided into three parts: base block, upper sliding mass, and lower sliding mass. Then two sliding masses are divided into the smaller discrete deformable blocks based on pre-existing discontinuities. Size effect of the huge landslide is also considered. Baseline corrected real horizontal and vertical ground motions are taken as volume force acting to the base block. The results show that seismic force has a significant influence on the landslide progression, sliding distance, and shape of post-failure. Results of the horizontal-and-vertical situation are in good agreement with those obtained from post-earthquake field investigation, remote sensing image and description from the survivors.
AB - This study presents the run-out analysis of the Daguangbao landslides subjected to near-fault multi-direction earthquake forces using discontinuous deformation analysis (DDA). The Daguangbao landslide is the largest landslide induced by the 2008 Wenchuan earthquake. In order to investigate the effects of near-fault seismic force on landslide run-out, kinematic behavior of sliding mass is simulated by a dynamic discrete numerical analysis method called DDA. In this simulation, based on the shape of failure surface and the feature of slope geology, the whole slope is divided into three parts: base block, upper sliding mass, and lower sliding mass. Then two sliding masses are divided into the smaller discrete deformable blocks based on pre-existing discontinuities. Size effect of the huge landslide is also considered. Baseline corrected real horizontal and vertical ground motions are taken as volume force acting to the base block. The results show that seismic force has a significant influence on the landslide progression, sliding distance, and shape of post-failure. Results of the horizontal-and-vertical situation are in good agreement with those obtained from post-earthquake field investigation, remote sensing image and description from the survivors.
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U2 - 10.1016/j.enggeo.2013.08.002
DO - 10.1016/j.enggeo.2013.08.002
M3 - Article
AN - SCOPUS:84887118111
SN - 0013-7952
VL - 166
SP - 216
EP - 236
JO - Engineering Geology
JF - Engineering Geology
ER -