考虑扭转和畸变效应的薄壁箱梁超收敛单元研究  

Research on Super-convergent Element of Thin-walled Box Girder Considering the Torsion and Distortion Effects

作　　者：陈建芳[1] 李伟 谢雯馨 罗振先 

机构地区：[1]广西大学土木建筑工程学院工程防灾与结构安全教育部重点实验室,广西南宁530004 [2]郑州市市政工程勘测设计研究院广州分院,广东广州510640

出　　处：《西部交通科技》2015年第7期29-33,共5页Western China Communications Science & Technology

基　　金：广西理工科学实验中心重点项目(LGZX201101);广西自然科学基金项目(2013GXNSF BA019237)

摘　　要：文章基于Benscoter梁理论和箱梁畸变理论,建立了一个关于薄壁箱梁约束扭转问题的2节点8自由度的超收敛单元,该单元可以精确考虑薄壁箱梁的扭转和畸变效应,只需一个单元就可得到精确解。通过与Vlasov的广义坐标法进行算例比较,证明该单元有较高的精度。This article, based on Benscoter beam theory and box girder distortion theory, established a 2-node super-convergent element with 8 degrees of freedom about restrained torsion problem of thin- walled box girder, this element can accurately consider the torsion and distortion effect of thin-walled box girders,only one element is needed to get the exact solution.Through calculation comparison with Vlasov＇s generalized coordinate method,it proved that this element has a higher accuracy.

关 键 词：薄壁箱梁 约束扭转 畸变 单元 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]