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

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Abstract

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.

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Acknowledgements

This study has received financial support from the National Natural Science Foundation of China (41672286, 41761144080 and 41530639); Science & Technology Department of Sichuan Province (2017JQ0042); Ministry of Science and Technology of China (KY201801005); State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining & Technology (SKLGDUEK1806); Innovation-Driven Project of Central South University (No. 2019CX011). The financial supports are gratefully acknowledged. The authors wish to thank the editors and three anonymous reviewers for their time and effort in reviewing our article.

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Correspondence to Ying-bin Zhang or Peng-cheng Yu.

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Zhang, Yb., Xiang, Cl., Chen, Yl. et al. Permanent displacement models of earthquake-induced landslides considering near-fault pulse-like ground motions. J. Mt. Sci. 16, 1244–1257 (2019). https://doi.org/10.1007/s11629-018-5067-2

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  • DOI: https://doi.org/10.1007/s11629-018-5067-2

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