基于ABAQUS网格节点的滑裂面搜索方法  

A Method of Sliding Surface Searching Based on ABAQUS' Grid Node

作　　者：刘正才[1] 曹勇龙 周靖[1] 

机构地区：[1]湘潭大学土木工程与力学学院,湖南湘潭411105

出　　处：《湘潭大学自然科学学报》2013年第4期36-41,共6页Natural Science Journal of Xiangtan University

基　　金：湖南省自然科学基金项目(09JJ3126)

摘　　要：针对边坡稳定性分析提出一种基于网格节点搜索的方法——ESM(Enumeration Methods)法.其实现过程是:通过ABAQUS建立模型并划分调整好网格,分别在边坡上、下缘选择一定范围的网格节点作为开始区和结束区.依次从开始区开始,按照一定的控制条件遍历中间每一个可能出现滑动的节点,到结束区即认为搜到一条滑裂面.通过该系列节点做竖向线划分土条,利用简化简布法计算出安全系数,对比每一个安全系数,取出最小值及相应节点集,重复开始下一个开始区节点搜索,将定义的开始区和结束区所有节点遍历后再寻找出整个模型的最小安全系数和极限滑动面.ESM法是一种将极限平衡法在有限元软件中实现的尝试,能很好地解决强度折减法不能搜索出滑裂面的问题.通过两个标准实例的测试,计算结果与理论解吻合,误差在2%以内.ESM （Enumeration Methods） is a method node searching. Concrete realization process is： make for slope stability analysis which is based on grid a model; adjust and divide the grid through the ABAQUS, choose a range of grid node for a start zone and end zone in the slope edge and slope lower edge respectively. Start from the start zone, according to certain control condition we run through every possible sliding node that intermediately, it is thought that search to a slip crack surface when to end zone. Do verti- cal line through this series of node to divide soil stripe, using the simplified simple distribution method to calculate the safety factor, contrast each factor of safety, take out the minimum and the corresponding node set, then repeat the beginning of the next one search to start zone node, find out the minimum safety factor and limit sliding surface in the whole model after aU nodes in the defined start area and the end zone are ex- amined. The ESM is a kind of attempt to make use of limit equilibrium method in finite dement software. It can be a good solution to the problems that strength reduction method can not search out the slip surface. Tested by using two standard sample, the results are consistent compared with the theoretical solution and the errors are less than 2 %.

关 键 词：滑裂面搜索 强度折减法 简布法 ABAQUS PYTHON 

分 类 号：TU432[建筑科学—岩土工程]