小浪底土石坝纵向振动简化动力分析
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摘要
采用三维剪切楔理论和ＢｕｂｎｏｖＧａｌｅｒｋｉｎ 方法，对小浪底土石坝的纵向地震反应进行简化分析，得到了该坝的最大位移、最大速度、最大加速度、最大应力等动力特性．分析成果表明，小浪底大坝的基本自振周期约为１３１９ｓ，坝顶的最大绝对加速度约为１０３６ｇ ．
By use of the 3 dimensional shear wedge theory and the Bubnov Galerkin method,a simplified dynamic analysis of longitudinal earthquake responses of the Xiaolangdi earth rock dam is made.Some dynamic characteristics,such as the maximum displacement,speed,acceleration and stress,are obtained.The analysis result shows that the fundamental frequency of the Xiaolangdi earth rock dam is about 1 319 s.Its maximum absolute acceleration at the dam crest is about 1 036 g during earthquakes.
By use of the 3 dimensional shear wedge theory and the Bubnov Galerkin method,a simplified dynamic analysis of longitudinal earthquake responses of the Xiaolangdi earth rock dam is made.Some dynamic characteristics,such as the maximum displacement,speed,acceleration and stress,are obtained.The analysis result shows that the fundamental frequency of the Xiaolangdi earth rock dam is about 1 319 s.Its maximum absolute acceleration at the dam crest is about 1 036 g during earthquakes.
引文
1 潘恕,沈凤生,杨宗茂等.小浪底斜心墙堆石坝的地震反应分析.人民黄河,1994(8) :36～39
2 林秀山.黄河小浪底水利枢纽文集.郑州:黄河水利出版社,1997 .167～174
3 AbdelGhaffar A M,AikSiong Koh.Longitudinal vibration of nonhomogeneous earth dams.Earthquake Engineering and StructureDynamics,1981 ,9:279 ～305
2 林秀山.黄河小浪底水利枢纽文集.郑州:黄河水利出版社,1997 .167～174
3 AbdelGhaffar A M,AikSiong Koh.Longitudinal vibration of nonhomogeneous earth dams.Earthquake Engineering and StructureDynamics,1981 ,9:279 ～305
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