1 引言 对于混凝土重力坝,强烈的地震地面运动将会在坝体内产生超过混凝土抗拉强度的应力区域,从而导致混凝土裂缝的形成和扩展,削弱了结构的作用。而且将影响混凝土坝的动力性能。 迄今为止,已有好几个模型被用于混凝土重力坝的非线性动力分析。其中许多模型是基于对涂抹式方法进行各种修正而产生 1 INTRODUCTION In the case of concrete gravity dam, the strong earthquake ground motion will generate stress region in the dam body that exceeds the tensile strength of concrete, leading to the formation and expansion of concrete cracks, weakening the structure. But also affect the dynamic performance of concrete dams. To date, several models have been used for nonlinear dynamic analysis of concrete gravity dams. Many of these models are based on various modifications to the spread method