【摘要】 本文建立了一种拱坝-地基-库水系统地震反应分析的非线性有限元模型,可以同时考虑无限地基的辐射阻尼、坝体混凝土损伤开裂非线性和坝体横缝非线性等影响高拱坝地震反应的关键因素。利用所建立的有限元模型,以我国拟建的大岗山高拱坝为例,分析研究了地基辐射阻尼对坝体混凝土损伤开裂和坝体横缝开度的影响。结果表明,地基辐射阻尼可以明显减小强地震荷载作用下,坝体中上部的损伤开裂程度和坝体横缝的最大张开度,并改变其分布规律。更多还原

【Abstract】 A nonlinear finite element model is developed for analyzing the seismic response of arch dam-foundation rock-reservoir system.The radiation damping of infinite foundation rock,damage of dam concrete and opening of contraction joint can be considered simultaneously in this model.The model is applied to analyze the Dagangshan high arch dam with height 210m.The effect of radiation damping on damage of dam concrete and opening of contraction joints are investigated.The results show that the radiation damping can reduce the seismic damage of the upper-middle portion of the dam and the maximum joint openings under strong earthquake.更多还原