摘要
G325国道九江大桥(重建)为独塔双索面斜拉桥,主梁为叠合梁结构,由工字型主梁、车行道横梁、小纵梁、钢检修道悬臂梁组成的平面钢梁格,再与其上叠合的混凝土桥面板构成。由于该桥主梁构造复杂,采用普通梁单元无法精确获得其应力分布,基于以上原因,利用块体单元及板壳单元组成的组合模型对该桥进行精细有限元仿真分析。介绍了如何制定仿真分析的建模方案,并对建模细节进行介绍,最后给出了该仿真分析的结果以及对设计方案的评价及建议。
The Jiujiang Bridge of G325 National Highway（rebuilt） is a cable-stayed bridge with single tower,double cable planes and steel-concrete composite beam,which consists of concrete slab and plane steel beam grids consisting of H girds,traffic lane cross girders,small longitudinal girders and cantilever beam of steel maintenance path.The structure of the beam is so complicated that the accurate stress distribution can＇t be obtained by the normal beam elements.Therefore,the model of the composite beam is built by solid elements and shell elements for the fine finite element simulation analysis.Besides,how to propose the modeling scheme and the details of modeling are introduced in detail.Finally,the results of the simulation analysis and the evaluation and advices about the design scheme are presented.
出处
《广东公路交通》
2012年第4期10-16,共7页
Guangdong Highway Communications
关键词
斜拉桥
叠合梁
精细有限元
仿真分析
cable-stayed bridge
composite beam
the fine finite element
simulation analysis
