某景区人行悬索桥舒适度分析

Analysis on Comfort Level of Pedestrian Suspension Bridge in a Scenic Area

以某景区内的1座人行悬索桥为研究背景,结合国内外相关研究结果,建立人行荷载模型及舒适度评价指标要求,介绍了该类人行悬索桥在不满足国内人行桥设计规范要求时对舒适度的评价方法及过程;同时,为进一步提高舒适度,进行了基于调谐质量阻尼器(TMD)的减振措施预案设计。结果显示,该人行悬索桥基频较低,不会出现人桥共振,舒适度满足限值要求;TMD减振措施能有效提高桥梁结构的舒适性。分析结果可为国内建立此类桥型的舒适度评价体系提供参考。

Based on a pedestrian suspension bridge in a scenic area and combined with the relevant research results at home and abroad,the pedestrian load model is established and the comfort level evaluation index requirements are proposed.The evaluation method and process of the comfort level for this kind of pedestrian suspension bridge under the condition of not meeting the requirements of local pedestrian bridge design specifications are introduced.In order to further improve the comfort level,the measure plan of vibration reduction based on tuned mass damper(TMD)is designed.The result shows that the lower base frequency of this pedestrian suspension bridge does not cause the resonance of the pedestrian and bridge,and the comfort level also meets the limit requirements.The TMD vibration reduction measures can effectively improve the comfort of the bridge structure.The analysis result can provide the reference for establishing a comfort level evaluation system for such bridges in China.