挡土结构地震惯性力沿高度分布系数研究  

Research on Height Distribution Coefficients of Earthquake Inertia Forces on Retaining Structures

作　　者：李春凤[1] 贺栓海[1] 鲍卫刚 

机构地区：[1]长安大学,陕西西安710064 [2]中交桥梁技术有限公司,北京100010

出　　处：《公路交通科技》2009年第1期51-56,共6页Journal of Highway and Transportation Research and Development

摘　　要：通过利用波动有限元技术,对挡土结构土体系的动力反应状态进行估算,研究地震作用下挡土墙和桥台的加速度沿高度分布系数,为提出沿高度分布系数建议提供依据。本研究设定人工边界条件,运用透射公式以简化波动有限元算法,对不同高度的6类挡土墙以及2个扩大基础桥台等在18条地震波输入下的地震反应进行估算,得到挡土墙地震最大加速度反应规律,最终总结得到挡土结构地震惯性力沿高度分布规律,并为抗震设计规范的修编提出建议。Based on the finite element analysis for wave motion techniques, the dynamic response of retaining structures was estimated to research acceleration distribution coefficients of retaining walls and abutments during earthquake. According to artificial boundary settings and by applying transmission model to simplify finite element calculation, the responses of 6 retaining walls with different heights and 2 abutments with spreading foundation under 18 seismic waves were analyzed, and the response pattem of maximum acceleration of retaining walls under earthquake was obtained.Finally, the height distribution pattern of the inertia force of the retaining structures under earthquake inertia force was summed up, and suggestions for modification of specification of anti-seismic design were made.

关 键 词：道路工程 挡土结构 水平地震作用 分布系数 

分 类 号：U417.11[交通运输工程—道路与铁道工程]