采用MTMD的钢人行桥人致振动减振效应实测与分析  

Field Measurement&Analysis of Human-Induced Vibration Damping Effects in Steel Pedestrian Bridges Using MTMD

作　　者：王瑞龙 张培君 WANG Rui-long;ZHANG Pei-jun(Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd.,Shanghai 200092,China;Shanghai Municipal Engineering Design Co.,Ltd.,Shanghai 200438,China)

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海200092 [2]上海市政工程设计有限公司,上海200438

出　　处：《中国市政工程》2025年第1期56-60,145,146,共7页China Municipal Engineering

基　　金：上海市青年科技启明星计划资助(21QB1405000)。

摘　　要：随着轻质高强材料的应用和城市景观的要求,人行桥不断向轻柔大跨的方向发展。我国现行规范通过频率调整来控制人行桥振动的方法存在一定的局限性。文章针对某U形钢结构人行桥的人行振动问题,采用多重调谐质量阻尼器(multiple tuned mass damper,简称MTMD)进行分频布控的减振设计,并对其进行现场实测和数值分析。MTMD控制频率分别为一阶竖弯频率1.95 Hz、1.70 Hz。实测结果表明:MTMD安装后,人行桥的一阶竖弯频率降低,不同人行激励频率下减振率达到80%以上,人行舒适度均达到“最好”级别。同时,数值模拟结果与实测结果匹配较好,可采用数值模拟的方法进行人行桥的减振设计。Modern pedestrian bridges increasingly adopt lightweight,long-span designs for structural and aesthetic purposes,yet current vibration control standards based on frequency adjustment exhibit limitations.This study addresses human-induced vibrations in a U-shaped steel pedestrian bridge through a Multiple Tuned Mass Damper(MTMD)system with frequency-specific vibration control.The MTMD targeted first vertical bending frequencies of 1.95 Hz and 1.70 Hz.Field tests revealed an 80%vibration reduction across excitation frequencies post-installation,with pedestrian comfort upgraded to excellent level.Numerical simulations corroborated experimental results,validating computational methods for vibration control design.

关 键 词：人行桥 人致振动 多重调谐质量阻尼器 现场测试 数值模拟 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]