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研究了大跨轻柔斜拉人行桥人致振动舒适度问题。基于有限元方法建立了某大跨度斜拉人行桥的分析模型并进行了动力特性分析;进行了该桥在环境脉动激励作用下的动力特性实测和不同人行荷载作用下的动力响应测试;依据英国规范BS5400评价了该桥的振动舒适度状况。结果表明,该桥在人行荷载作用下存在较为显著的振动响应和一定程度的振动舒适度问题。
The problem of human-induced vibration comfort of long-span soft-stayed footbridge is studied. Based on the finite element method, the analysis model of a large-span cable-stayed bridge was established and its dynamic characteristics were analyzed. The dynamic characteristics of the bridge under dynamic pulsation and the dynamic response under different pedestrian loads were tested. Specification BS5400 evaluated the bridge’s vibration comfort status. The results show that the bridge has more significant vibration response and some degree of vibration comfort under the pedestrian load.