【摘要】 利用FLAC3D动力弹塑性模型对土石坝进行了地震反应分析,着重讨论了FLAC3D进行土石坝地震反应分析时的地震波滤波和基线校正、动力边界条件设置、瑞利阻尼参数确定等关键问题,并用FISH语言实现了坝体初始剪切模量和体积模量随平均主应力的非线性变化。分析结果表明,在地震荷载作用下,该土石坝发生了22.3 cm的竖向永久变形,坝顶加速度放大了2.9倍。更多还原

【Abstract】 The seismic response analysis of embankment dam under earthquake loading by using FLAC3D dynamic elasto-plastic model is performed herein.Some key issues are specially discussed,including baseline correction and filtering,dynamic boundary condition setting and Raleigh damping parameters setting.The non-linear changes of dam’s initial shear modulus and initial bulk modulus with mean effective stress are also calculated by FISH.The results show that the embankment dam occur a 22.3 cm vertical permanent deformation and 2.9 times enlargement of dam crest acceleration under earthquake loading更多还原