人行天桥动力性能研究

Pedestrian bridge dynamic performance research

结合福州某环形天桥管养工作,对该人行天桥的动力性能和人致振动的舒适性开展探讨,通过动力测试及有限元模型分析,结果表明竖向基频低于3Hz,引起行人不适,建议通过增强天桥主梁刚度或设置减震措施,同时避免在天桥上设置广告而增加自重。

Combined with custody work of a ring-shaped flyover in Fuzhou,pedestrian bridge dynamic performance and comfort of human-induced vibration was explored.Through the dynamic test and analysis of finite element model,results show that the vertical pitch less than 3Hz would lead to human uncomfortable.It is recommended that stiffness of main beams should be enhanced,or vibration reduction measures should be taken,while advertising weight should be avoided.