【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.更多还原

【Abstract】 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.更多还原