永安广场天桥上部结构验算及舒适度分析

Check of Superstructure and Analysis of Comfort Level of Yongan Square Footbridge

襄阳市永安广场人行天桥横跨人民路和大庆西路,主桥主梁分为三个梁段,平面呈U型布置。该桥处于襄阳市永安广场商圈,为襄阳繁华的商业地带,自然形成的庞大休闲人群,对过街需求量较大。故对本桥进行上部结构验算分析,确保其运营安全,并进行人行舒适度分析,是一个重要的问题。采用Midas有限元软件,建立精细化钢箱梁天桥有限元模型,根据实际施工步骤确定计算工况,开展天桥受力情况有限元分析,参照《德国人行桥设计指南》(EN03-2007)规范进行人行舒适度分析。结果表明:桥梁结构强度、刚度、安全性均满足规范要求,人行舒适度满足规范舒适性指标限值。

Yongan Square Footbridge in Xiangyang City crosses Renmin Road and West Daqing Road.The main girder of the main bridge is divided into three girder sections.The plane is arranged in a U shape.This bridge is located in the business area of Yongan Square in Xiangyang,which is a busting commercial area of Xiangyang.The large leisure population naturally formed is in great demand to cross the street.Therefore,the superstructure of this bridge is checked and analyzed to ensure its operation safety.The analysis of pedestrian comfort level is an important issue.The finite element model of refined steel box girder footbridge is established by Midas finite element software.Based on the practical construction steps,the construction condition is determined and calculated.The finite element analysis of stress condition of the footbridge is carried out.Referring the standards in German Footbridge Design Guide(EN03-2007),the pedestrian comfort level is analyzed.The result shows that the structural strength,stiffness and safety of the bridge all meet the specification requirements,and the pedestrian comfort level meets the standard comfort index limits.