冻土路基在地震作用下的动力响应  

Dynamic Response of Embankment in Cold Regions to Earthquake Action

作　　者：刘志强[1,2] 陆昊[1] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070 [2]中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州730000

出　　处：《冰川冻土》2011年第4期807-812,共6页Journal of Glaciology and Geocryology

基　　金：中国科学院知识创新工程重要方向项目(KZCX3-SW-351);兰州交通大学"青蓝"人才工程项目(QL-06-15A)资助

摘　　要：青藏高原是地震多发区,冻土区的公路、铁路在地震作用下的动力响应必须考虑.将冻土作为黏弹塑性材料,考虑冻土在动力荷载作用下的热力耦合效应,从热传导方程、渗流微分方程和动力平衡方程出发,建立了冻土的动力热-力耦合微分方程.根据相应的有限元列式,对路基在地震荷载作用下的动力响应进行了计算与分析.The Tibetan Plateau is one of the regions that earthquake occurs frequently. It is essential to consider the effect of earthquake on the railways and roads. In this paper, according to the theories of heat transfer, seepage and dynamic equilibrium equation, assuming that frozen soil is an elastic-visco-plastic material, taking the couple of thermal and mechanical into account, the finite element formulae of dynamic problem are presented, and the computer program of two-dimensional finite element is written. Using the program, the dynamic response of embankment loaded by earthquake is worked out.

关 键 词：冻土 路基 动力响应 

分 类 号：U213.1[交通运输工程—道路与铁道工程]