小箱梁桥旧桥加宽受力特性研究

Study on the Load Characteristics of Small Box Girder Bridge

近年来,随着我国交通量的不断增加,大多数城市道路交通拥挤和车辆积压问题成为阻碍城市快速发展的新瓶颈,很多已建成通车的道路已不能满足现今所需的交通运营能力要求,不能很好地适应经济社会发展和城乡建设的需求。基于某小箱梁加宽桥实例,分别对原桥加宽两片梁、三片梁进行受力特性分析,分析在时间发展上的规律性,从而提高原有桥梁结构承载能力,延长桥梁服役年限,减少经济损失。此次计算分析结果可以为同类桥梁的计算提供参考。

In recent years,with the continuous increase of traffic volume in our country,most urban road traffic congestion and backlog of vehicles have become a mew bottleneck hindering the rapid development of cities.Based on an example of a small box girder widening bridge,this paper analyzes the force characteristics of the original bridge widening two beams and three beams respectively,and analyzes the regularity of the development in time,so as to improve the bearing capacity of the original bridge structure,prolong the service life of the bridge and reduce the economic loss.The results can provide reference for the calculation of similar bridges.