文章指出现有钢桥结构计算方法存在不能准确反映桁架杆件之间和杆件与桥面之间的 连续性能、忽略桁架杆件横向尺寸效应等问题,分析全壳单元模型对常用钢桥结构的适用性,提出 建立与实现大跨钢桥全桥全壳单元模型的方法,同时分析指出这一结构分析计算新方法所具有的 通用性。

There are some sho rtcoming s in t radi tio nal methods of structural analy sis based o n pin-jointed truss members and beam elements, such as inaccurate descriptio n o f co nnection among the members of t russ and betw een the members and deck system, a nd ov erloo king effect s on cross width of members of truss. Suitability of all shell elements mo del in steel bridg es i s a naly zed in this article. The method o f establishment a nd implementatio n o n this computing model of 3-D st ructural analy sis in long spa n steel bridg es is presented. The new model i s univ ersal in the computatio n of steel bridg es.