探讨碾压混凝土坝薄层单元有限元分析法  

Study on thin|layer element and application in FEM analysis of RCCD dams

作　　者：顾冲时[1] 程乐群[1] 李婷婷[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：《计算力学学报》2004年第6期718-721,共4页Chinese Journal of Computational Mechanics

基　　金：教育部跨世纪优秀人才培养计划基金;973计划(2002CB412707);国家自然科学基金重点资助项目(50139030);教育部博士点基金(20020294005)资助项目.

摘　　要：分析了碾压混凝土层面影响带厚度、物理力学参数等确定的方法,提出了薄层单元有限元法的原理和方法,探讨了该方法在分析碾压混凝土坝工作性态中的应用。实例表明,薄层单元有限元法能较有效地分析带有层面的碾压混凝土坝性能。A roller-compacted concrete (RCC) dam was a technique for constructing dams. It has the virtues of the structure of ordinary concrete dam and construction of roller-compacted earth dam. However, RCCD has many horizontal construction planes that become weak parts of the dam body. And the Finite Element Method (FEM) is used to analyze its structure and seepage. Using non-thickness element or adopting planes in some special locations to simulate the effect of its construction planes, which is different form the actual state. Based on this, the paper derives the formula of calculating influence thickness according to the seepage theory, Young's modulus, Poisson's ratio and shear modulus of the planes according to the characteristics of series-wound and shunt-wound connection. Consequently, the FEM with thin-layer element is developed and applied, which analyzes how to treat the planes and the process of establishing elements and derives the stiffness matrix of the planes' elements. The case example shows that the model can be applied to analyze the behavior of RCCD.

关 键 词：碾压混凝土坝 层面 薄层单元 有限元 

分 类 号：TV642.2[水利工程—水利水电工程] TU311.4[建筑科学—结构工程]