闭口薄壁杆件计算理论的探讨  

Doubt about traditional analytical theory of thin walled bar with closed form

作　　者：方志 祝彦知[2] 

机构地区：[1]合乐中国有限公司,上海200021 [2]中原工学院土建系,河南郑州450007

出　　处：《河南城建学院学报》2009年第4期13-15,共3页Journal of Henan University of Urban Construction

摘　　要：通过三维实体有限元与基于乌曼斯基和符拉索夫的约束扭转理论的解析方法,对一箱型梁计算结果的比较表明,两者的结果差异很大,提出在重要的薄壁结构设计中应该采用有限元或者其它有效的数值方法对其计算结果进行校核与验证。In comparison of the results of a thin walled box - beam calculated by using 3 - D solid F.E. with fine meshes to the analyti- cal ones by using the constrained twisting theory proposed by Umeuski and Vlasov, a great difference is presented. The shape of the cross section of the thin walled bar is obviously changed. Thus, it is reasonable to doubt the accuracy of both the analytical method and its relevant assumption. The paper suggests that a numerical computation by using F. E. M or other effective one should be adopted to check and verify the analytical results for important structures with thin walled bars.

关 键 词：薄壁杆件 解析理论 有限元法 约束扭转 

分 类 号：TU39[建筑科学—结构工程]