带T单元的膜结构力密度法找形及程序编制  

Theory and Programming of Form-Finding via Force Density Method for Membrane Structures with T-Elements

作　　者：苏建华[1] 韩大建[1] 徐其功[1] 

机构地区：[1]华南理工大学建筑学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2005年第8期75-79,共5页Journal of South China University of Technology(Natural Science Edition)

摘　　要：在力密度法中引入T单元的概念,建立了带T单元的力密度法平衡方程,推导了膜线单元以及索边界T单元的单元力密度矩阵,编制了带T单元的膜结构力密度法找形程序,从而解决了组合膜结构找形中边界索的“锯齿”问题.最后用算例验证了该方法的可行性及所编制程序的正确性.The concept of T-element is applied to the force density method. The equilibrium equation of the force density method with T-elements is presented. Then, the force density matrixes of the membrane elements and the T-elements on cable edges are deduced, and the corresponding form-finding program is designed. Thus, the problem of saw-liked edge cables in the form-finding of combined membrane structures can be solved. The feasibility of the proposed method and the correctness of the proposed program are finally verified by examples.

关 键 词：T单元 组合膜结构 力密度法 找形 

分 类 号：TU351[建筑科学—结构工程]