广东公路交通
廣東公路交通
엄동공로교통
GUANGDONG HIGHWAY COMMUNICATIONS
2012年
4期
10-16
,共7页
斜拉桥%叠合梁%精细有限元%仿真分析
斜拉橋%疊閤樑%精細有限元%倣真分析
사랍교%첩합량%정세유한원%방진분석
cable-stayed bridge%composite beam%the fine finite element%simulation analysis
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。
G325國道九江大橋（重建）為獨塔雙索麵斜拉橋,主樑為疊閤樑結構,由工字型主樑、車行道橫樑、小縱樑、鋼檢脩道懸臂樑組成的平麵鋼樑格,再與其上疊閤的混凝土橋麵闆構成。由于該橋主樑構造複雜,採用普通樑單元無法精確穫得其應力分佈,基于以上原因,利用塊體單元及闆殼單元組成的組閤模型對該橋進行精細有限元倣真分析。介紹瞭如何製定倣真分析的建模方案,併對建模細節進行介紹,最後給齣瞭該倣真分析的結果以及對設計方案的評價及建議。
G325국도구강대교（중건）위독탑쌍색면사랍교,주량위첩합량결구,유공자형주량、차행도횡량、소종량、강검수도현비량조성적평면강량격,재여기상첩합적혼응토교면판구성。유우해교주량구조복잡,채용보통량단원무법정학획득기응력분포,기우이상원인,이용괴체단원급판각단원조성적조합모형대해교진행정세유한원방진분석。개소료여하제정방진분석적건모방안,병대건모세절진행개소,최후급출료해방진분석적결과이급대설계방안적평개급건의。
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.
