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Published in:
2022 | OriginalPaper | Chapter
SEM-Newmark Sliding Mass Analysis for Regional Coseismic Landslide Hazard Evaluation: A Case Study of the 2016 Kumamoto Earthquake
Authors : Zhengwei Chen, Gang Wang
Publisher: Springer International Publishing
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Abstract
Coseismic landslides have been observed to cause severe damage during many historic earthquakes. Numerical simulation of fault rupture process, wave propagation and triggering of landslides considering realistic topography and geological conditions helps identify the key factors in the landslide triggering and evaluate the potential slope instability in seismically active areas.
In this study, a physics-based regional coseismic landslide evaluation framework is constructed by integrating the flexible sliding analysis into spectral element model (SEM). The framework combines advantages of SEM model for its capability of simulating complex 3D large-scale wave propagation and a flexible mass sliding analysis for capturing local soil response in coseismic slope stability evaluation. Besides, equivalent linear method is implemented to incorporate the effect of soil nonlinearity.
The developed model is adopted to simulate the landslides in the Aso Volcano area triggered by the 2016 Kumamoto earthquake. Realistic digital elevation model, site conditions and fault rupture model of simulated region (51 km × 43 km) are used in the simulation. The resulting sliding response is compared with the inventory of the triggered landslides to validate the proposed model.