南水北调与水利科技2017，Vol.15Issue(5)：110-115,6.DOI:10.13476/j.cnki.nsbdqk.2017.05.017
地震作用下呷爬滑坡的变形特征分析
Deformation characteristics analysis of Gapa landslide under seismic effects
摘要
Abstract
We established a three-dimensional Gapa landslide model using the finite difference software FLAC3D,and applied to it the El-Centro seismic wave magnified by one and three folds respectively.The calculation results showed that the slope would be permanently displaced under the effect of single-fold seismic waves,but would not slide;under three-fold seismic waves,the slope would slide.Moreover,the slope had different deformation and slippage characteristics when agitated by single-fold and three-fold seismic waves.In the first case,the deformation mainly concentrated on the sliding body Ⅲ;but in the second case,the sliding body Ⅰ also had intense deformation.We analyzed this phenomenon from three aspects:the components and materials parameters of the landslide,the topographic factors of the slide region,and the dynamic response of the slide region.We calculated the permanent displacement of sliding bodies I and III using the Newmark finite sliding displacement method,and the results were consistent with the numerical calculation.The results showed that the dynamic response of sliding body Ⅲ would result in greater permanent displacement,and thus verified the numerical calculation.The permanent displacement obtained based on structural dynamic response can also be used as an index of the impact of earthquake on local deformation,and thus to estimate the damage of an earthquake.关键词
呷爬滑坡/变形特征/Newmark方法/永久位移/加速度响应Key words
Gapa landslide/deformation characteristics/Newmark method/permanent displacement/acceleration response分类
土木建筑引用本文复制引用
马斌,李昕尧,梁超..地震作用下呷爬滑坡的变形特征分析[J].南水北调与水利科技,2017,15(5):110-115,6.基金项目
国家科技支撑计划(2013BAB05B05)National Science and Technology Support Program(2013BAB05B05) （2013BAB05B05）
