基于变形分析的空间梁单元模型研究（英文）  

Spatial beam element model based on deformation analysis

作　　者：周倩南[1] 顾观东[1] 袁行飞[1] 钱若军[2] 

机构地区：[1]浙江大学空间结构研究中心,浙江杭州310058 [2]同济大学土木工程学院,上海200092

出　　处：《空间结构》2013年第3期91-96,共6页Spatial Structures

基　　金：the National Natural Science Foundation of China(Grant No.51278461 and 51108347);the Key Science and Technology Innovation Team of Zhejiang Province (2010R50034)

摘　　要：基于变形分析理论,提出了适用于空间杆系结构的两节点二十二自由度梁单元分析模型.该模型考虑了拉压、弯、剪、扭等多因素耦合作用.为提高模型精度,放弃了轴向等应变假定,引入剪切位移,并对塑性阶段的平截面假定进行了修正.在上述空间梁单元模型研究基础上编制了非线性程序,并以一三维框架为例验证了模型的有效性和精确性.The paper presents a degrees of freedom. Based on th pull, press, bend, the assumption of shear, and constant introduced. The plane cross-s the plastic stage. Using the p three-dimensional framework efcient and accurate. new spatial beam e deformation anal element model of two nodes with twenty-two ysis, the coupled effects of multifactor, such as torsion are considered. To improve the accuracy of the new model, longitudinal strain is abandoned and the shear displacement is ection assumption of beam is also modified when the material is at roposed model, the nonlinear analytical program is developed and a is analyzed. The numerical results show the developed model is

关 键 词：变形分析 空间梁单元 剪切变形 耦合效应 

分 类 号：TU311[建筑科学—结构工程]