某城轨高架车站人行天桥钢桁架结构设计

Steel Truss Structure Design of Pedestrian Bridge in an Urban Rail Elevated Station

人行天桥是跨越城市道路的重要通道。以某沿海城市轨道交通高架车站的人行天桥为工程案例,本文从天桥结构选型、静力及动力特性分析、支座选择等几个方面,对人行天桥结构设计进行了分析和总结。人行天桥的钢桁架结构形式利用了大跨度结构的特点,满足建筑功能和外观美化的要求,实现建筑与结构设计的合理统一,兼顾桥面行人空间和屋面雨棚需求;同时,根据台风区特点进行优化设计,并合理选用桥梁支座以释放温度应力,并满足设计要求。相关结构设计经验及建议可供类似工程结构设计参考。

Pedestrian overbridge is an important channel across urban roads.Takes the pedestrian overbridge of a coastal urban rail transit elevated station as an engineering case.From the selection of bridge structure,static and dynamic characteristics analysis,bearing selection and other aspects,the structural design of steel truss pedestrian overbridge is analyzed and summarized.The steel truss structure of the pedestrian overbridge takes advantage of the characteristics of the large-span structure.It realizes the reasonable unity of building and structural design,taking into account the needs of pedestrian space and roof canopy on the bridge deck.At the same time,the optimization design is carried out according to the characteristics of the typhoon area,and the bridge bearing is reasonably selected to release the temperature stress and meet the design requirements.Relevant structural design experience and suggestions can be used as reference for similar engineering structural design.