人群与交通振源下综合交通枢纽振动规律研究OACHSSCDCSTPCD

Taking Wuhan Station as research object,this paper studied the vibration characteristics of the integrated transportation hub structure under the coupling of crowd load and multiple traffic vibra-tion combined with field measurement and numerical simulation,explored the most unfavorable vibra-tion source conditions and vibration sensitive areas of the waiting floor,and evaluated its vibration comfort level.The results show that,compared with the single load,the peak acceleration of the wait-ing floor increases obviously under the coupling of crowd load and other traffic vibration sources.With the increase of the number of vibration sources,the peak acceleration of the waiting floor slab increa-ses,the frequency domain of vibration acceleration widens,and the vibration attenuation rate slows down,but the crowd load will accelerate the vibration attenuation.The closer the main frequency of vibration acceleration of the coupled vibration source is,the more obvious the amplification of peak acceleration is.The vibration sensitive area of the waiting floor is the middle span of the floor,and the most unfavorable vibration source condition is the coupling of crowd load with the traffic load of high-speed railway,subway and road surface.The waiting floor meets the vibration comfort requirement un-der weighted acceleration,but its vibration exceeds the fourth power vibration measurement value lim-it.This study has important engineering significance for the operation and vibration control of transpor-tation hub structures.