软土地基中插入式大直径薄壁圆筒结构的一种简化数值计算方法  

An Simplified Numerical Calculate Method Of Embedded Large Cylinder Structure In Soft-clay Groundwork

作　　者：钟晓红[1] 肖仕宝[1] 周锡礽[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《海洋技术》2005年第2期104-108,134,共6页Ocean Technology

基　　金：国家自然科学基金资助项目(59909005);国家教育部博士点基金资助项目(20020056030)

摘　　要：简述了对插入式大直径薄壁圆筒进行数值分析采用的力学机制,用弹簧元模拟薄壁圆筒与地基土体接触面间的连接所形成一种简化的数值计算模型,运用大型通用有限元软件ANSYS进行二次开发后对其进行数值计算与分析,比较了对筒内外淤泥粘土采用不同加固处理方法以及考虑相邻圆筒间采用不同边界约束条件时,对圆筒的应力和稳定性的影响。通过实例计算,验证了该数值模型的有效性与可行性,并得出一些有益结论。The mechanism used in the numerical analysis of embedded large cylinder structure is briefly introduced in this paper and a simplified numerical model is established by the spring-element simulating the contact boundary between the cylinder and foundation. The effect of different treated method concerning the soft clay inward-outward the cylinder and different contact boundary conditions between adjacent cylinders on the stress and the stability of cylindrical structure are analyzed and compared by the large-scale finite element software ANSYS. The engineering example has been calculated by this model ,and it's show that this numerical model is verified and feasible, and some correlative conclusions are obtained.

关 键 词：数值计算方法 大直径 插入式 圆筒结构 软土地基 数值计算模型 加固处理方法 薄壁圆筒 ANSYS 有限元软件 力学机制 数值分析 二次开发 约束条件 实例计算 数值模型 接触面 弹簧元 稳定性 应力和 土体 粘土 淤泥 

分 类 号：TU473.14[建筑科学—结构工程] TM341[建筑科学—土工工程]