上限有限元定理在挡土墙土压力问题中的应用  

Application of Upper Bound Finite Element Method in Earth Pressure on Retaining Wall

作　　者：吕云霞[1] 陆长峰[1] 刘帅[1] 

机构地区：[1]江苏科技大学,江苏镇江212003

出　　处：《施工技术》2006年第S2期54-56,60,共4页Construction Technology

摘　　要：在上限定理的基础上,将墙后土体离散为三角形单元,在单元中构造线性速度场,根据相关联流动法则以及边界条件建立约束方程,引入数学规划方法寻求挡土墙土压力为三角形分布时的土压力系数的上限解。通过具体的算例说明该方法是一种有效的数值方法。According to upper bound theory,soil is divided into discrete triangular elements,then kinematically admissible linear velocity field within elements is construct.Functions subjected to associated flow rule within elements,associated flow rule along discontinuities and boundary conditions are solved by the method of mathematical programming,and the solution of earth pressure of triangle distributing on retaining wall is obtained.The method presented in the paper proves to be correct using analytical solutions.

关 键 词：挡土墙 上限定理 土压力系数 流动法则 速度间断线 

分 类 号：TU432[建筑科学—岩土工程]