Permanent displacement models of earthquake-induced landslides considering near-fault pulse-like ground motions

Autor: Zhiwang Chang, Qian-gong Cheng, Yingbin Zhang, Pengcheng Yu, Yan-long Chen, Chenlin Xiang, Xiao Li
Rok vydání: 2019
Předmět:
Zdroj: Journal of Mountain Science. 16:1244-1257
ISSN: 1993-0321
1672-6316
Popis: The permanent displacement of seismic slopes can be regarded as an effective criterion for stability estimation. This paper studied the characteristics of permanent displacements induced by velocity pulse-like ground motions and developed an empirical model to readily evaluate the stability of seismic slopes in a near-fault region. We identified 264 velocity pulse-like ground motions from the Next Generation Attenuation (NGA) database using the latest improved energy-based approach. All selected ground motions were rotated to the orientation of the strongest observed pulse for considering the directivity of the pulse effect, so that the most dangerous condition for slopes was considered. The results show the velocity pulse-like ground motions have a much more significant effect on permanent displacement of slopes than non-pulse-like ground motions. A regression model based on a function of peak ground velocity (PGV), peak ground acceleration (PGA) and critical acceleration (ac), was generated. A significant difference was found by comparing the presented model with classical models from literatures. This model can be used to evaluate the seismic slope stability considering the effects of near-fault pulse-like characteristics.
Databáze: OpenAIRE
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