复合单元法的物理和数值试验验证

简述了复合单元法的基本原理和算法，该方法的主要优点在于可以明显地减少前处理的工作量和难度，且可以与有限单元很好地耦合在一个系统中。介绍了宝珠寺重力坝的物理模型超载试验。分别采用三维弹黏塑性复合单元法和三维弹黏塑性有限单元法对宝珠寺重力坝的超载工况进行了数值试验，并与物理试验进行比较。结果表明，三种方法得到的特征点位移吻合得较好，两种数值试验方法的整体位移和应力也基本一致。研究验证了复合单元法的正确性，也说明了该算法的主要优点：前处理简单，计算精度与有限单元法相当，同时还证实了复合单元单元法可以较好地解决复杂岩基上重力坝的变形与破坏问题。

Validation of composite element method by physical and numerical tests

The principle and algorithm of composite element method(CEM) are briefly described.The major merits of the method are the preprocessing work load and difficulty can be reduced remarkably;and it can be coupled with finite element method(FEM) system very well.Then the physical model overloading test for Baozhusi Gravity Dam is illustrated.The overloading cases of numerical tests are carried out by three dimensional elasto-viscoplastic FEM and three dimensional elasto-viscoplastic CEM separately for the dam.Th...