平行弦钢桁架过街人行天桥设计  

The Design of a Parallel Chord Steel Truss Pedestrian Bridge

作　　者：董震 

机构地区：[1]上海市地下空间设计研究总院有限公司,上海200020

出　　处：《价值工程》2016年第18期113-115,共3页Value Engineering

摘　　要：分析北京某平行弦桁架人行过街天桥设计,该天桥主体结构由上部两榀钢桁架和下部混凝土柱组成,总长52.5m,单跨最大跨径30m。设计考虑竖向地震、温度效应等荷载作用,并计算结构竖向第一振动频率,避免人群行走时桥身产生共振。设计方法和结构选型可供技术人员作同类设计参考。The paper describes the design of a parallel chord steel truss pedestrian bridge in Beijing. The main structure of the bridge is composed of above two steel trusses and concrete columns bottom. The most span of the bridge is 30m, and the whole length is 50m. The structure calculation includes of the vertical earthquake, temperature effect and the first natural frequency of vertical vibration for avoiding the resonance of the bridge caused by human walking. The design method and selection of the structure provide reference for similar design.

关 键 词：人行天桥 平行弦桁架 结构设计 钢结构 

分 类 号：U448.11[建筑科学—桥梁与隧道工程]