摘要
采用三维非线性有限元方法,分析了高面板堆石坝的混凝土面板在不同输入加速度峰值作用下的动力反应。计算结果表明,面板的顺坡向峰值动应力发生在0.8倍坝高附近,坝轴向峰值动应力发生在坝顶中间部位的面板区域;面板的峰值动应力随着输入加速度的增大呈非线性增大。面板中上部会出现较大的动应力,可能会使面板发生顺坡向和坝轴向的挤压或拉裂破坏,因此建议该区域加强配筋。
Three -dimensional nonlinear FEM is adopted to analysis dynamic response for concrete -face of high CFRD in the different input peak acceleration. The caclulation results show that alone slpoe peak dynamic stress distributed in concrete - face at 0. 8 times height of dam, and axial peak dynamic stress distributed in the middle of the crest. Peak dynamic stress of concrete - face is nonlinear advanced with the growth of input acceleration. Stronger dynamic stress appears in the upper part of the concrete - face where may be crushing or tension failure along slope and axial. So it is suggested that the upper region of the concrete - face should be strengthened with reinforcement.
出处
《水利科技与经济》
2011年第9期50-52,共3页
Water Conservancy Science and Technology and Economy
关键词
高面板堆石坝
动应力
非线性有限元
混凝土面板
加速度峰值
high concrete faced rockfill dam
dynamic stress
nonlinear FEM
concrete - face
peak acceleration
