地震作用下坡体几何特征对多级黄土边坡动力响应影响

兰州理工大学学报 ›› 2026, Vol. 52 ›› Issue (2): 137-144.

地震作用下坡体几何特征对多级黄土边坡动力响应影响

叶帅华^1,2, 王英杰^1,2, 李京榜^*3, 陶晖⁴, 叶炜钠³

1.兰州理工大学甘肃省土木工程防灾减灾重点实验室, 甘肃兰州 730050;
2.兰州理工大学西部土木工程防灾减灾教育部工程研究中心, 甘肃兰州 730050;
3.兰州工业学院土木工程学院, 甘肃兰州 730050;
4.甘肃建筑职业技术学院建筑工程系, 甘肃兰州 730050

收稿日期:2022-07-08 出版日期:2026-04-28 发布日期:2026-04-28
通讯作者: 李京榜(1987-),男,河南方城人,博士,副教授. Email:lst_123143567@163.com
基金资助:
国家自然科学基金(52168050),甘肃省教育厅2025年甘肃省高校教师创新基金(2025B-242),甘肃省2026年度甘肃省青年人才(团队项目)(2026QNTD024)

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

YE Shuai-hua^1,2, WANG Ying-jie^1,2,LI Jing-bang³, TAO Hui⁴, YE Wei-na³

1. Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China;
2. Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou 730050,China;
3. College of Civil Engineering, Lanzhou Institute of Technology, Lanzhou730050, China;
4. Department of Architectural Engineering, Gansu Vocational College of Architecture, Lanzhou 730050, China

Received:2022-07-08 Online:2026-04-28 Published:2026-04-28

摘要/Abstract

摘要： 以典型三级黄土工程边坡为实验对象,利用PLAXIS 3D有限元软件建立三维模型,应用明显更加贴近黄土动力特性行为的本构模型,输入地震波,分析不同平台宽度、坡高以及坡率下多级黄土边坡在地震作用下动力响应规律.计算结果表明,平台宽度的增加、坡高的减小和坡率的减小都可以有效增加多级黄土边坡在地震作用下的稳定性.其中坡体在地震作用下位移响应最大值一般出现在坡面中间部位,坡体内部一定深度范围出现塑性变形区,且随着平台宽度增加以及坡高和坡率的减小,塑性变形区的范围也相对减小.坡高改变对于多级黄土边坡在地震作用下的PGA放大系数的影响明显大于平台宽度和坡率改变.

关键词: 多级边坡, 小应变, 地震, 动力响应, 塑性变形

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

中图分类号:

TU457

叶帅华, 王英杰, 李京榜, 陶晖, 叶炜钠. 地震作用下坡体几何特征对多级黄土边坡动力响应影响[J]. 兰州理工大学学报, 2026, 52(2): 137-144.

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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链接本文: https://journal.lut.edu.cn/CN/

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

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