摘要
结合大坝工程实例,根据堆石料的大型动三轴试验结果,确定了坝料的残余体应变和残余剪应变模式,特别是非饱和料的残余体应变模式。在所建立的面板坝三维非线性动力反应有限元法基础上,结合孔隙水压力扩散和消散的计算,建立了一套同时计入残余体应变和残余剪应变的面板堆石坝地震永久变形的计算方法。最后,结合案例进行了地震永久变形的计算,分析了坝体地震永久变形的量值和分布情况,为大坝的抗震设计提供了有力的技术依据。
Combined with the reality dam project, on the basis of proposed 3-D nonlinear dynamic FEM of dam and considering the characteristics of dam, the residual volumetric strain mode and shear strain mode of rockfill, especially, the residual volumetric strain mode of unsaturated rock, U, are established according to test results of large-scale dynamic triaxial tests on the rockfills dam. Furthermore, a set of method to calculate the earthquake induced permanent deformation of dam incorporating residual volumetric strain and residual shear strain is established. Then the earthquake induced permanent deformation of dam is calculated.
出处
《四川建筑科学研究》
北大核心
2009年第5期149-154,共6页
Sichuan Building Science
关键词
坝坡
地震反应
残余体应变
地震永久变形
dam slope
seismic response
residual volumetric strain
earthquake induced permanent deformation
