摘要
建立各种偏心支承情况下曲线梁桥的有限元模型 ,包括梁相对支座偏心 ,梁相对桥墩偏心、支座相对桥墩偏心等情况。提出采用一种“点单元”来统一模拟弹性支座和刚性支座 ,使得软件的实现十分方便。通过这种点单元的引入 ,也使过去在结构分析软件中常用的支座单元和主从节点成为点单元的一种特例 。
A finite element model for curved girder bridges with various eccentric supports has been developed. Included in the eccentric supports are the following: (a) girder axis is eccentric to the center of bearing; (b) the girder axis is eccentric to the axis of pier; and (c) the center of bearing is eccentric to the axis of pier. A “joint element” is proposed to model both elastic and rigid bearings, which enables software to be used very conveniently. Through introduction of the “joint element”, the bearing element and the so called active and reactive joints often used in software for structural analysis previously become a special case, thus makes the software writing simplified dramatically.
出处
《桥梁建设》
EI
CSCD
北大核心
2000年第3期8-10,共3页
Bridge Construction
关键词
弯桥
曲线梁
有限元法分析
偏心支承
模型
curved bridge, curved girder, finite element analysis, eccentric support, model
