钢箱梁及钢桁架城市人行天桥对比分析

钢箱梁桥在我国城市人行天桥中应用广泛,其优点是线型美观,工厂预制装配式施工方便等。然而由于需要控制竖向自振频率,钢箱梁一般梁高过高,造成压抑感强,两侧梯道过长等缺点也不容忽视,因此钢桁架桥在城市人行桥中也是一种可以广泛普及的桥型,本文对相同跨径的两种桥型就结构用钢量、竖向自振频率、施工性、梯道爬高等方面进行了综合对比。

The Compare Between Steel Box Girder And Steel Truss In City Overpass

Steel box girder bridges are widely used in our city pedestrian bridge and it has the characteristic such as linear appearance and easy factory prefabricated construction. However, due to the need to control the vertical nat- ural vibration frequency, the box girder general beam steel is too high. As a result the steel truss bridge in the city pedestrian bridge is also a widely the popularity of the bridge type. The particle compares among the same span of two bridge type comprehensive comparison of the amount of structural steel, vertical natural frequency, constructa- bility, stairways climbed higher.