固结计算中接触面渗流问题的模拟  

SIMULATING SEEPAGE THROUGH INTERFACE IN CONSOLIDATION ANALYSIS

作　　者：介玉新[1] 许延春[2] 李广信[1] 

机构地区：[1]清华大学水利水电工程系 [2]天地科技股份有限公司,北京100013

出　　处：《工程力学》2007年第z1期104-107,共4页Engineering Mechanics

基　　金：国家自然科学基金资助项目(50274042)

摘　　要：在土工数值计算的固结问题有限元计算中常遇到两种材料的接触问题,此时一般要设置接触面单元,比如Goodman无厚度单元。接触面单元的力学行为可以通过其切向和法向刚度系数反映,但如何反映其渗透性质有待进一步探讨,加筋土固结计算中也有如何模拟沿筋材的导水性问题。针对这一问题,本文采用了一种较为简单且物理概念明确的方法,并在实际计算中得到初步应用。这种方法也可直接应用在常规的渗流分析中。Interface element such as Goodman’s interface element is often used in consolidation analysis by FEM. With shear stiffness and normal stiffness,Goodman’s element can model the mechanical property of the interface. However,how to simplistically simulate its seepage characteristics deserves further investigation. Similar thing occurs with seepage along geosynthetics. The authors resolved the problems in a simple way,and verified it with a case analysis. It is thought that the method is not only suitable for consolidation problem,but also very useful in general seepage analysis.

关 键 词：固结 渗流 接触面 有限元 加筋土 

分 类 号：TU4[建筑科学—土工工程]