京沪高铁徐州东站旅客人行天桥振动研究

Vibration study of passenger footbridge in Xuzhou East Station of Beijing-Shanghai high-speed railway

对京沪高铁徐州东站旅客人行天桥的振动及减振措施进行研究。通过实测和计算结果对比分析,确定列车风是引发天桥振动的主要因素,并进一步对列车提速情况下的振动响应进行计算;为确保人行天桥的安全性和舒适性,提出了合理可行的减振方案,并对各种减振方案的效果进行了计算分析。经计算,人行天桥采用增设立柱和阻尼器方案后,主梁跨中区域和桥面跨中区域的减振效果最为明显。

The vibration and vibration reduction measures of passenger footbridge in Xuzhou East Station of Beijing-Shanghai high-speed railway were studied. Through comparative analysis of the measured and calculated results, train wind is the main factor to cause the vibration of passenger footbridge. The vibration response in the case of train speeding up was further calculated. To ensure the safety and human comfort level of the bridge, feasible vibration reduction measures were proposed and performance of measures was analyzed. Through calculations, the scheme of additional columns and dampers that the passenger footbridge adopted has obvious damping effects in midspan regions of main girder and footbridge.