| 地震作用下黄土边坡动力响应数值分析 |
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| 引用本文： | 言志信,曹小红,张刘平,张海东. 地震作用下黄土边坡动力响应数值分析[J]. 岩土力学, 2011, 32(Z2): 610-614 |
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| 作者姓名： | 言志信 曹小红 张刘平 张海东 |
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| 作者单位： | 1.兰州大学 土木工程与力学学院, 兰州 730000; 2. 兰州大学 西部灾害与环境力学教育部重点实验室, 兰州 730000 |
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| 基金项目： | 西部灾害与环境力学教育部重点实验室开放课题(No.klmwde201005) |
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| 摘 要： | 利用FLAC3D软件对某三级黄土边坡进行了动力反应分析。首先分析了静力作用下该黄土边坡剪应变增量和坡面、坡内、坡顶不同监测点的位移；在此基础上进行动力分析，得出黄土边坡地震动力响应规律。研究结果表明，静力作用下坡面上水平向位移明显大于垂直向位移，水平向位移从坡底向上逐渐减小；坡面处位移较大，位移在每级坡坡脚稍向上一定范围内达到最大值；地震作用下黄土边坡剪应变增量由坡脚稍向上部位开始向周围扩展，范围明显增大，且随地震持时的增加剪应变增量增幅较大；塑性区变化显示该黄土边坡坡顶以拉破坏为主，坡脚稍向上开始以剪破坏为主并伴有拉破坏。黄土边坡对地震波具有临空面放大效应，地震波在坡体内传播过程中还具有滞后效应
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| 关 键 词： | FLAC3D 黄土边坡 地震作用 动力响应 |
| 收稿时间： | 2011-06-02 |
Numerical analysis of loess slope dynamic response under earthquake |
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| YAN Zhi-xin,,CAO Xiao-hong,ZHANG Liu-ping,ZHANG Hai-dong. Numerical analysis of loess slope dynamic response under earthquake[J]. Rock and Soil Mechanics, 2011, 32(Z2): 610-614 |
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| Authors: | YAN Zhi-xin CAO Xiao-hong ZHANG Liu-ping ZHANG Hai-dong |
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| Affiliation: | 1. School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China; 2. Key Laboratory of Mechanics on Disaster and Environment in Western China of Ministry of Education, Lanzhou University, Lanzhou 730000, China; |
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| Abstract: | Using the fast Lagrangian analysis of continua in 3 dimensions(FLAC3D) software,the dynamic response of a three terrace loess slope was analyzed.First,the shear strain of the loess slope,and the displacement of different monitoring points in the surface,inside and upside of the slope were analyzed under the static action.On this basis,the dynamic analysis was made;and the seismic response of loess slope was obtained.The results showed: under the static action,the horizontal displacement of monitoring points... |
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| Keywords: | FLAC3D loess slope earthquake dynamic response |
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