【摘要】 给出了混凝土重力坝动力响应分析的时域有限元法.其中,地震波的输入方法以及无限地基辐射阻尼的模拟方法都是在柱面波动方程的基础上建立起来的.这种方法先通过对无限地基的人工截断获得有限计算域,然后沿人工边界布置一系列弹簧和阻尼器来模拟无限地基,在有入射波的边界上用与入射波速成正比的等效力来实现地震动的输入.数值算例表明,该方法简单有效,易于实现,并能够保证一定的精度.更多还原

【Abstract】 A time-domain finite element method for seismic response analysis of concrete gravity dams was presented.The methods for treatment of earthquake input and modeling of radiation damping in infinite foundation were established based on cylindrical wave equation.In this method,a finite domain was obtained by truncation of the infinite foundation,and the truncated foundation was simulated by a series of dashpots and springs along the boundaries.Then,the earthquake inputs on the boundary with incident waves were simulated with an equivalent force directly proportional to the velocity of incident waves.Case studies show the validity and accuracy of the present method.更多还原