统一滑移线与有限元求解路基极限荷载  

BEARING CAPACITY OF ROADBED BY UNIFIED SLIP LINE FIELD METHOD AND FINITE ELEMENT METHOD

作　　者：程彩霞[1] 赵均海[1] 魏雪英[1] 

机构地区：[1]长安大学建筑工程学院,陕西西安710061

出　　处：《工程力学》2006年第8期150-154,共5页Engineering Mechanics

基　　金：教育部博士点基金资助项目(20040710001);陕西省自然科学基金资助项目(2003E215)

摘　　要：应用统一强度理论和统一平面应变滑移线场理论对路基的极限荷载进行了分析,得到了统一滑移线解,此结果考虑了材料的拉压异性和中间主应力的效应,对于岩土类材料有很好的适用性。同时用大型有限元软件Ansys进行了数值分析并与统一滑移线场的计算结果进行了比较,二者接近,证明了统一平面应变滑移线场理论能较真实地反应岩土结构的受力情况,说明用统一强度理论求解路基极限荷载是可行的。The bearing capacity of roadbed is obtained based on the unified slip line theory and the unified strength theory （UST）. The effect of strength difference in tension and compression and the intermediate principal stress effect are taken into account in the solution. The bearing capacities of roadbed were also analyzed using the finite element program ANSYS. The predicted values are compared with the solutions based on unified slip line theory and good agreement can be observed. It can be concluded that the unified slip line theory is suitable for analysis of the limit loads of roadbed.

关 键 词：固体力学 边坡稳定 统一滑移线场理论 极限荷载 有限元 

分 类 号：TU443[建筑科学—岩土工程]