【摘要】 针对经历了"5.12"汶川大地震的紫坪铺面板堆石坝工程,进行了坝料的大型动三轴试验,研究了先期振动对坝料残余应变的影响。在此基础上,采用基于3维非线性动力反应的地震永久变形计算方法,进行了紫坪铺面板坝地震永久变形的计算,重点分析了先期震动对坝体地震永久变形的影响。结果表明,如果考虑先期已遭受强震作用影响,大坝的地震残余变形明显减小。更多还原

【Abstract】 Aiming at the Zipingpu concrete-face fill rock dam(CFRD) which had suffered "5.12" Wenchuan Earthquake,the effect of pre-vibration on the residual strains of rockfill are studied by the large-scale dynamical triaxial test.Based on the test results,the earthquake-induced permanent deformations of Zipingpu CFRD are evaluated by adopting the developed evaluation method of 3-D nonlinear earthquake-induced permanent deformations,its focuses are the effect of pre-vibration on the earthquake-induced permanent deformation.If the effect of pre-vibration is considered,the earthquake-induced permanent deformation of CFRD is reduced greatly.更多还原