Influence of slope geometric features on the dynamic response of multi-stageloess slopesunder seismic loading

Abstract

Abstract: Taking a typical three-stage engineered loess slope as the experimental object, a three-dimensional model is established by using the PLAXIS 3D finite element software, and the constitutive model which is obviously closer to the dynamic behavior of loess is incorporated. Seismic waves are applied to investigate the law of dynamic response of multi-stage loess slope under different platform widths, slope height, and slope rate. The calculation results show that the stability of multi-stage loess slope under seismic excitation can be effectively increased with the increase of platform width, the decrease of slope height, and slope rate. Furthermore, the maximum displacement response of the slope under seismic excitation generally appears in the middle section of the slope, and the plastic deformation zone develops in a certain depth range inside the slope, which will be decreased with the increase of platform width, the decrease of slope height and slope rate. Meanwhile, the influence of the change of slope height on the PGA magnification factor of multi-stage loess slope under seismic excitation is obviously greater than that of platform width and slope rate.

Key words: multi-stage slope, small strain, seismic, dynamic response, plastic deformation

CLC Number:

TU457

YE Shuai-hua, WANG Ying-jie,LI Jing-bang, TAO Hui, YE Wei-na. Influence of slope geometric features on the dynamic response of multi-stageloess slopesunder seismic loading[J]. Journal of Lanzhou University of Technology, 2026, 52(2): 137-144.

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URL: https://journal.lut.edu.cn/EN/

https://journal.lut.edu.cn/EN/Y2026/V52/I2/137

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