基坑开挖地下连续墙有限元分析

提出一种新的地下连续墙有限元计算模型。该模型采用8节点等参单元，考虑剪应力的影响，把开挖侧土体的支撑用Winkler模型来模拟，使最后建立的总刚度矩阵保持对称、正定的性质，因而可以采用“半带状变带宽-维压缩存贮”的方式来进行存放，并且可以采用cholesky分解法求解线性方程组，从而极大地节省计算机内存，提高计算效率。算例结果表明此模型既结合工程实际，又不失精确性。

Finite Element Analysis of Diaphragm Walls in Foundation Pit

A new finite element computational model of diaphragm walls in foundation pit is presented. In this new model, the eight-note isoparameteric element is employed for the diaphragm wall; the Winkler model is adopted for the support of soil on the dug side of the pit. The final global stiffness matrix keeps the character of symmetry and positive definiteness, such that it can be deposited as the manner of one dimension and the final equation can be solved by the Choleky method. Compared with a known model in computing some engineering examples, the present model is shown to be not only practical but also accurate.