汶川地震中沙牌拱坝坝体分缝开裂分析

采用基于接触力方法的接触非线性模型研究沙牌拱坝横缝和诱导缝在汶川地震中的工作性态,同时计入地基辐射阻尼效应。对横缝和诱导缝取不同强度的组合进行多方案的对比计算,从上游坝顶张开度时程、最大张开度数值以及最大张开度分布三个方面进行较为全面的分析,对解释汶川地震中沙牌拱坝横缝和诱导缝地震反应有参考价值。

Crack analysis of Shapai arch dam joints under the Wenchuan earthquake

The behavior of transverse and induced joints in Shapai arch dam under the Wenchuan earthquake is investigated with a contact nonlinear model based on the contact force method, and the effect of radiation damping in foundation is included. Several schemes combining transverse and induced joints of different strengths are computed and compared. A comprehensive analysis on three features of the joints on the upstream crest, i.e. opening duration, maximum opening and its distribution provides an interpretation on the seismic responses of transverse and induced joints in this arch dam.