碾压混凝土坝层内弹性模量分布规律研究  

Study on intra-layer distribution of elastic modulus for roller compacted concrete dams

作　　者：陈龙[1] 顾冲时[1] 

机构地区：[1]河海大学水利水电工程学院,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2005年第4期409-412,共4页Journal of Hohai University(Natural Sciences)

基　　金：教育部"跨世纪优秀人才培养计划"基金资助项目(2003512643);教育部博士点基金资助项目(20020294005)

摘　　要：根据碾压混凝土坝的施工过程和压实机理,认为弹性模量沿层深呈指数衰减分布.将碾压单元层分解成多层结构,用分解刚度法导出了层内弹性模量与本体和层面弹性模量之间的关系.用分解刚度法和有限元方法研究了不同层厚和强度下的弹性模量分布规律,得出了弹性模量指数衰减系数随着层厚和异弹模比的增大而减小的结论.According to the process of construction and mechanism of compaction of RCCDs, it was considered that the elastic modulus was exponentially attenuated along the depth of layers. By decomposition of single roller compacted layer into multi layers, the relationships between the intra-layer elastic modulus and the elastic moduli of dam body and layer interface were derived by use of the stiffness partition method. With the stiffness partition method and FEM, the elastic modulus distribution in layers of different thickness and strength was studied. It is concluded that the coefficient of exponential attenuation of elastic modulus inversely varies with the thickness of layers and the ratio of the elastic modulus of layer interface and that of the dam body.

关 键 词：分解刚度法 碾压混凝土 弹性模量 分布规律 

分 类 号：TV642.2[水利工程—水利水电工程]