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钢框架高等分析中考虑局部屈曲的子结构法
引用本文:王孟鸿,王连坤,郝际平,张俊峰.钢框架高等分析中考虑局部屈曲的子结构法[J].计算力学学报,2009,26(4):494-499.
作者姓名:王孟鸿  王连坤  郝际平  张俊峰
作者单位:1. 北京建筑工程学院,土木与交通工程学院,北京,100044
2. 五邑大学土木建筑系,江门,529020
3. 西安建筑科技大学土木工程学院,西安,710055
基金项目:国家自然科学基金(50378078)资助项目
摘    要:将相对自由度概念引入三维实体等参数单元,得到了16结点相对自由度壳元的插值表达式,并基于更新拉格朗日构型的虚位移原理推导了该壳单元的刚度矩阵。在单元刚度矩阵形成以后采用子结构法对内部结点自由度进行聚缩,根据薄壁构件相关假定并考虑截面翘曲因素的影响,通过边界结点的位移协调条件把壳单元组装成每端7个自由度的薄壁梁-柱单元参与整体分析,可以考虑板件局部屈曲的影响;突破了传统分析的紧凑型截面限制,并通过算例证明了本文方法的精确度和有效性。

关 键 词:高等分析  相对自由度壳元  子结构  局部屈曲  薄壁梁-柱单元  
收稿时间:2007/4/27 0:00:00

Substructure method considering local buckling in steel frame advanced analysis
WANG Meng-hong,WANG Lian-kun,HAO Ji-ping and ZHANG Jun-feng.Substructure method considering local buckling in steel frame advanced analysis[J].Chinese Journal of Computational Mechanics,2009,26(4):494-499.
Authors:WANG Meng-hong  WANG Lian-kun  HAO Ji-ping and ZHANG Jun-feng
Institution:1.School of Civil and Transportation Engineering;Beijing University of Civil Engineering and Architecture;Beijing 100044;China;2.Department of Civil Engineering and Architecture;Wuyi University;Jiangmen 529020;3.School of Civil Engineering;Xi'an University of Architecture and Technology;Xi'an 710055;China
Abstract:The concept of relative degrees-of-freedom is introduced into the isoparametric element,and the interpolation expressions of 16 nodes shell element with relative degrees-of-freedom are obtained.The element stiffness matrix is derived according to the increment virtual displacement principle based on the updated Lagrange configuration.After the formation of substructure's stiffness matrix the degrees-of-freedom of internal nodes are condensed.According to the Vlasov's premises,the thin-walled beam-column ele...
Keywords:advanced analysis  shell element with relative degrees-of-freedom  substructure  local buckling  thin-walled beam-column element  
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