建筑结构学报2018，Vol.39Issue(1)：109-119,11.DOI:10.14006/j.jzjgxb.2018.01.013
高铁站房大跨钢楼盖行车和人群荷载激励下振动响应实测与分析
Vibration response measurement and analysis of large-span steel floor structure at high-speed rail station under moving train and crowd excitations
摘要
Abstract
A field testing study was conducted on the concourse floor structure of Xi'an High-Speed Rail Station.Using accelerometers installed on the floor and data acquisition and analysis system,vibration measurements were taken during train arrival and departure,and under crowd-induced excitations.The study was aimed to investigate structural vibration responses under different load cases,human-structure interaction and the effects of walking mode and frequency on structural vibration.The results indicate that the floor does not incur excessive vertical vibration during train arrival and departure,and passenger boarding.Under different cases of crowd excitations,the maximum equivalent sinusoidal peak acceleration can reach 609.99 mm/s2 when resonance occurs.Human-structure interaction can be observed from the responses under resonance.People in different modes of walking have different perceptions of the same floor vibration.Spectrum analysis indicates that responses have large magnitudes at the walking step frequency and its multiples.The first three orders of crowd walking excitation have the greatest contribution to floor vibration responses,hence it shall be sufficient to consider only the first three orders of crowd walking excitation in comfort analysis.The peak acceleration will overestimate acceleration response and ESPA is suggested to be adopted for vertical comfort evaluation.关键词
大跨钢楼盖/行车激励/人群荷载/现场实测/舒适度Key words
large span steel floor/driving train excitation/crowd load/field measurement/comfort分类
建筑与水利引用本文复制引用
马斐,张志强,张晓峰,李爱群..高铁站房大跨钢楼盖行车和人群荷载激励下振动响应实测与分析[J].建筑结构学报,2018,39(1):109-119,11.基金项目
国家自然科学基金项目(51278106,51438002),江苏省产学研前瞻项目(BY2016076-11). （51278106,51438002）
