人行景观桥人致振动舒适度分析

Comfortability Analysis of Pedestrian-induced Vibration of Pedestrian Landscape Bridge

随着人行景观桥的不断发展,其结构呈现出大跨、轻柔、低阻尼等特点,但在人群荷载作用下,会引发人致振动现象,其基频基本不能满足国内现有规范要求。参照EN03—2007《德国人行桥设计指南》,通过计算桥梁结构的动力特性和峰值加速度响应,评价了结构的舒适度,采用该方法可为低频人行景观桥的设计提供参考与借鉴。

With the development of pedestrian landscape bridge,its structure presents the characteristics of long-span,soft and low damping.Pedestrian-induced vibration will be caused by the action of crowd load and its fundamental frequency can't meet the existing domestic codes requirements.Referred to EN03-2007 German Design of Footbridge,the dynamic characteristics of the bridge structure and peak acceleration response are calculated.The comfortability of the structure is evaluated.This method can provide reference for the design of low frequency pedestrian landscape bridge.