摘要
通过模拟人行随机荷载激励,分别采用四种人行荷载工况对一座既有钢结构人行桥进行了人致振动时程分析,从而更好地了解该人行桥在行人激励下的动力特性。考虑到现有人行桥的动力特点及对其振动舒适度评价方法的不足,提出了考虑结构双向耦合振动的舒适度评价方法,并对该桥进行了舒适度评价,证明了该桥在动力性能上存在的问题。这对人行桥人行荷载模拟、人行桥振动舒适度评价以及防振减振研究都具有参考借鉴意义。
According to simulating stochastic pedestrian loads, and adopting four load cases respectively, it analyzed the timehistory responses of an existing steel footbridge, which made the dynamic characteristics of the bridge understood better. By considering the dynamic characteristics of modem footbridges and the deficiencies of comfort evaluation method, it proposes a new evaluation method by considering coupling effect of bi-direction vibration. Using this method, a conclusion is drawn that some problems exist in dynamic performance of this footbridge certainly. This procedure, for simulating pedestrian loads, comfort evaluation and vibration reduction study, can be reference for similar engineering.
出处
《建筑结构》
CSCD
北大核心
2008年第6期50-53,共4页
Building Structure
关键词
人行桥
随机人行荷载
荷载工况
人致振动
舒适度评价
footbridge
stochastic pedestrian load
load cases
pedestrian-induced vibration
comfort evaluation
