设有纵缝的重力坝地震反应分析方法
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摘要
本文介绍模拟重力坝纵缝的二维缝隙单元，应用非直接对接的自由子结构模态综合技术，建立设有纵缝的重力坝地震反应非线性动力分析方法，以提高局部非线性动力问题的计算效率
A nonlinear joint elements is developed to simulate the opening and closing of contraction joints The element has a nonlinear force-displacement relationship which must be accounted for in the solution for dynamic response of gravity dam with contraction joints A special component modal synthesis approach is suggested to apply in the numerical procedure for dynamic analysis of nonlinear structural systems The solution time can be greatly reduced by using this approach The result of a numerical example shows that the opening and closing of the contraction joints may amplify the seismic response of gravity dam.
A nonlinear joint elements is developed to simulate the opening and closing of contraction joints The element has a nonlinear force-displacement relationship which must be accounted for in the solution for dynamic response of gravity dam with contraction joints A special component modal synthesis approach is suggested to apply in the numerical procedure for dynamic analysis of nonlinear structural systems The solution time can be greatly reduced by using this approach The result of a numerical example shows that the opening and closing of the contraction joints may amplify the seismic response of gravity dam.
引文
［1］华东水利学院，弹性力学问题的有限单元法水利水电出版社，1978年［2］楼梦麟，熊昌玉，宋春玉，设有纵缝的重力坝动力模型试验第四届全国地震工程会议论文集，1994年8月［3］楼梦麟，无对接界面的自由子结构模态综合法大连工学院学报，1987年第26卷第3期［4］MenglinLouetal，AmodalsynthesismethodfordynamicsubstrucfureringEurJMechA／Solids，Vol12，No3，pp403—416，1993［5］楼梦麟，混凝土坝动力分析的自由子结构模态综合法水利学报，1996年第7期
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