基于FLAC~(3D)的某碎石土边坡地震反应分析

英文篇名：An Analysis of the Seismic Response of Debris Slope Based on FLAC~(3D)
中文刊名：中国农村水利水电
英文刊名：China Rural Water and Hydropower
作者：鲁涛
英文作者：LU Tao(Key Laboratory for Geological Disasters inThree Gorges Reservoir ; mMinistry of Education ; Three Gorges University ; Yichang 443002 ; Hubei Province ; China)
中文关键词：数值分析 ; 碎石土边坡 ; 地震 ; FLAC3D
英文关键词：numerical analysis ; debris slope ; earthquake ; FLAC3D
出版日期：2011-07-15
机构：三峡大学三峡库区地质灾害教育部重点实验室;
年：2011
期：07
出版单位：中国农村水利水电

摘要

基于完全非线性的动力分析方法,利用FLAC3D软件对西南某碎石土边坡在地震下的稳定性进行分析。分析表明:地震作用下,边坡坡面的水平向永久位移最大,并由坡面向坡内逐渐减小;边坡的加速度时程与场地输入的PGA相比均有一定程度的放大;在边坡上随着高程的增加,水平方向向坡外的位移大小变化受边坡结构面的控制影响较大。研究结果有助于进一步探讨复杂边坡地震下的失稳机制。
Based on fully non-linear dynamic analysis methods,a stability analysis of southwestern debris slope under earthquake is made with FLAC3D in this paper.The research findings show that,affected by earthquakes,the maximum permanent displacement focuses on the surface of the slope and the value decreases gradually from surface to inside of the slope.The acceleration series shows a certain degree of amplification can be compared with PGA.With the elevation increase,the change of horizontal displacements is influenced greatly by controllable structural plane of slope.The results are helpful to further research on the mechanism of complicated slope instability under earthquakes.

引文

[1]杨正华.从汶川地震看小型水库的管理与灾后重建[J].中国农村水利水电,2009,(4),84-90.
    [2]陈育民.FLAC/FLAC3D基础与工程实例[M].北京:中国水利水电出版社,2008.
    [3]Itasca Consulting Group Inc.FLAC-3D(Fast Lagrangian Analy-sis of Continua in 3 Dimensions),Version 2.00,Users Manual(VolumeⅤ)[R].USA:Itasca Consulting Group Inc,1997.
    [4]蒋溥,戴丽思.工程地震学概论[M]北京:地震出版社,1993:226-230.
    [5]黄朝光彭大文.人工合成地震波的研究[J].福州大学学报(自然科学版),1996,24(4):82-88.
    [6]伍平,于建华.结构抗震设计中地震动输入的若干问题[J].西南交通大学学报,2002,37(11):44-49.
    [7]祁生文,伍法权,严福章,等.岩质边坡动力反应分析[M].北京:科学出版社,2007.