基于MSD模型的人行天桥舒适度研究
Comfort Level of Pedestrian Bridges Based on the MSD Model
熊红霞 1梁武 1刘可文2
作者信息
- 1. 武汉理工大学土木工程与建筑学院,武汉 430070
- 2. 武汉理工大学信息工程学院,武汉 430070
- 折叠
摘要
针对人行天桥舒适度评价标准合理性不明确的问题,基于MSD(mass-spring-dumper)简化分析模型,建立多人随机作用下的人桥耦合动力方程,通过有限多次数值计算结果进行概率统计分析,发现采用均方根加速度作为评价标准更加合理.对一座新建人行天桥,采用均方根加速度评价标准,应用改进的烦恼率模型进行舒适度评估.结果表明:天桥舒适度主要取决于行人振感限值,并与桥上的人流量有关.研究成果可为人行天桥的舒适度设计提供参考.
Abstract
Aim at the indeterminate rationality of the evaluation criteria used in the comfort level evaluation of pedestri-an bridges,based on the simplified analysis model of MSD,the human-bridge coupling dynamic equation under the random action of many people was established.Through the probability statistical analysis of the results of many times numerical calculations,it was found that the root-mean-square acceleration as the evaluation criteria was more reasonable than the structural peak acceleration.Using the RMS(Root Mean Square)Acceleration as the evaluation criterion,the comfort level of a pedestrian bridge engineering case was evaluated by the improved annoyance rate model.The results show that the comfort level of a pedestrian bridge is mainly determined by the vibration threshold of the pedestrian,and is related to the pedestrian flow.The research results provide a reference for the comfort level design of pedestrian bridges.
关键词
人-桥耦合相互作用/数值模拟/随机振动/人行天桥Key words
human-bridge coupled interaction/numerical simulation/random vibration/pedestrian bridge引用本文复制引用
基金项目
国家重点研发计划(2022YFF0707000)
出版年
2024
NETL
NSTL
万方数据