既有桥梁拼宽方案分析与对比

面对日益增长的桥梁通行需求,既有桥梁的拼宽处理势在必行。既有桥梁承载能力决定着桥梁拼宽的方式,文中以某工程项目为例,探讨了既有桥梁拼宽形式的合理选取方法。利用Midas Civil建立有限元模型,提取结构的内力,结合老桥检测结果,在对相关系数折减基础上,进行相应结构检算,明确整体拼宽及分离拼宽的适用条件及检算方式,为该类桥梁的改拓宽提供实例参考和实践经验。

ANALYSIS AND COMPARISON ON WIDENING FORM OF EXISTING BRIDGE

With the increasing demand of the bridge traffic,it is imperative for existing bridge with the width treatment subject to the bearing capacity.Taking an engineering project as an example,this paper discusses the reasonable selections of the form of the existing bridge width.The finite element model was established by using Midas Civil to extract the internal forces of the structure.Furthermore,based on the inspection results of old bridges and the reduced correlation coefficient,the corresponding structural inspection was carried out to clarify the applicable conditions and calculation methods of the overall width and the separate width,which may provide reference and practical experience for the renovation and widening of this kind of bridge.