大跨度钢箱梁人行天桥结构设计与分析

Structural design and analysis of long-span steel box girder pedestrian bridge

当今城市快速发展,机动车数量日益增多,受原有道路规划滞后导致通行能力不足的影响,高峰时段城市拥堵情况明显。建设人行过街天桥、取消地面斑马线和路口红绿灯可以较大提高通行效率,并且为城市立体空间发展提供支持。本文对双跨64 m的白云区人民医院钢箱梁天桥结构进行设计,并采用Midas2019在基本荷载组合和标准荷载组合工况下对应力、桥梁使用性、挠度等进行验算,结果表明:白云区人民医院天桥满足安全性和适用性的要求。本文内容可为同类人行过街天桥设计提供参考。

Nowadays,the cities are developing rapidly,the number of automobiles is growing.Owing to the lack of traffic capacity which caused by planning lag of the original road,the urban traffic jams is obvious in rush hours.Constructing pedestrian overpass,cancel the zebra crossing on the ground and traffic light at crossroad can significantly enhance the traffic efficiency,and provide supports for development of urban three-dimensional spaces.In this paper,the double span steel box girder structure of the overpass of Baiyun district people’s hospital is designed,and Midas 2019 is used to check the stress,bridge serviceability and deflection under the working conditions of basic load combination and standard load combination.The results show that the overpass meet the requirements of safety,applicability and durability.This paper can provide references for similar pedestrian overpass projects.