地震条件下抗滑桩桩前存在开挖的动力有限杆单元法研究  

Dynamic Finite Member Element Approach for Excavation In Front of Landslide Caisson under Seismic Conditions

作　　者：李帅[1] 孙勇[1] 吴静华[1] 冯启庄 LI Shuai SUN Yong WU Jinghua FENG Qizhuang(Key Laboratory of Karst Environment and Geological Hazard Prevention,Guizhou Universit Hainan Hydrological and Engineering Geology Investigation Institute Co.,Ltd)

机构地区：[1]贵州大学喀斯特环境与地质灾害防治重点实验室,贵阳550025 [2]海南水文地质工程地质勘察院,海口570110

出　　处：《土工基础》2016年第5期584-588,共5页Soil Engineering and Foundation

基　　金：国家自然科学基金资助项目(51168009);贵州省科学技术基金(黔科合J字[2010]2245);贵州省优秀教育人才省长基金(黔省专合字2011-35)

摘　　要：采用有限杆单元法理论、多质点有阻尼体系动力反应的振型叠加法理论、Rayleigh阻尼理论对地震作用下抗滑桩桩前存在开挖条件的振动时程进行了计算,分析了抗滑桩桩身弯矩以及桩顶位移。此外,进行了抗滑桩动力离心机模型试验,得到桩身弯矩以及桩顶位移,并与理论计算的结果进行了对比验证。揭示了抗滑桩在强震作用下桩前存在开挖时桩身弯矩的地震反应特征,可为地震作用下的抗滑桩设计提供依据。The dynamic response of the excavation of landslide resistant caisson under seismic conditions was numerically analyzed by using finite member element,vibration superposition method and Rayleigh damping theory.The bending moment in the caisson and the deformation and the top of the caisson were predicted.The centrifuge tests of the excavation of landslide resistant caissons under seismic conditions were performed to verify the numerical analysis results.This paper presents the bending moment characteristics under the seismic conditions and can provide design guides for the landslide resistant caisson under seismic conditions.

关 键 词：有限杆单元法 地震作用 抗滑桩 开挖 振动时程 

分 类 号：TU473[建筑科学—结构工程] TB115[建筑科学—土工工程]