先期震动对土石坝地震永久变形的影响研究  

Study on the effect of pre-vibration on earthquake-induced permanent deformation of an earth-rock fill dam

作　　者：赵剑明[1] 刘小生[1] 刘启旺[1] 陈宁[1] 常亚屏[1] 王宏[1] 

机构地区：[1]中国水利水电科学研究院,北京100048

出　　处：《世界地震工程》2011年第1期28-33,共6页World Earthquake Engineering

基　　金：国家自然科学基金重点项目(50639060);国家"十一五"科技支撑项目(2009BAK56B02);水利部"948"项目(200929)

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。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 CF1RD is reduced greatly.

关 键 词：土石坝 先期震动 残余应变 地震永久变形 

分 类 号：TU435[建筑科学—岩土工程] P315.98[建筑科学—土工工程]