桁架式铝合金人行天桥设计刚度问题研究

Research on design stiffness of truss type aluminum alloy pedestrian bridge

城市人行天桥规范中通过挠度指标控制人行天桥的刚度设计。本文针对桁架式铝合金人行天桥,探讨了其挠度指标与桁高、跨径、桥宽等因素的关系,总结了桁架式铝合金人行天桥最小桁高与跨径比例的经验计算公式,提出了满足刚度要求的桁高与跨径比例范围,以供桁架式铝合金人行天桥设计参考。

Controlling the rigidity design of pedestrian overpass by deflection index in the code of urban pedestrian overpass.This paper discussed the relationship between deflection index and truss height,span,bridge width,etc.The empirical calculation formula of minimum truss height and span ratio of truss type aluminum alloy pedestrian bridge was summarized.The ratio range of truss height and span to meet the rigidity requirements was proposed to provide reference for the design of truss type aluminum alloy pedestrian bridge.