【摘要】 基于大型商业有限元软件ABAQUS,并利用其平台提供的UMAT子程序接口开发了等效线性模型,分析某沥青混凝土心墙风化料坝的地震响应,为大坝的抗震安全评价提供依据.有限元计算结果表明:在地震作用下,坝顶、上下游坝坡近坝顶等位置有可能会有坝料松动、滑落的可能性,在上述区域需采取适当的抗震加固措施;心墙及坝体的动剪应力不是很大,分布较均匀,不会出现剪切破坏;坝体在地震中的沉陷比水平位移大,坝体地震沉陷量约为最大坝高的0.27%.更多还原

【Abstract】 On the basis of subroutine UMAT provided by ABAQUS,the equivalent linear model for dynamic analysis is implemented.Then,the finite element software ABAQUS is used to analyze seismic responses of a weathering dam with asphalt concrete core wall.The study results can provide a basis for evaluating aseismic safety of the dam.The finite element analysis results show that the dam crest and the upstream and downstream dam slope near dam crest location may arise loose and slide of dam materials during earthquake;for these areas,the appropriate reinforcement measures should be taken.The dynamic shear stress of core wall and the dam is distributed evenly and would not appear shear failure.During earthquake,the subsidence of the dam is larger than its horizontal displacement;and the seismic subsidence of the dam is about 0.27% of the maximum dam height.更多还原