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.
出处
《计算力学学报》
EI
CAS
CSCD
北大核心
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.
关键词
碾压混凝土坝
层面
薄层单元
有限元
Finite element method
Rollers (roadbuilding machinery)
Seepage
Structural design
