Study on vibration serviceability of elevated composite floor of Guangzhou Baiyun Railway Station under pedestrian-induced excitation and train-induced excitation
The steel-concrete composite floor structure system is used in the elevated waiting hall of Guangzhou Baiyun Railway Station building with a maximum span of 28.5m.Aiming at its vibration serviceability,the dynamic time-history response of the structure under pedestrian excitation at the elevated level and train excitation at the bearing level was investigated by numerical simulation.The pedestrian-induced excitation study considered various walking excitations to analyze the vibration serviceability of the structure imposed by fixed single-person walking,moving single-person walking,random multi-person walking and fixed multi-person walking.The train-induced excitation take a simplified train load model to simulate the train excitation,then the influence of train speed,train position and coupling of train excitation and pedestrian excitation on the vibration response of the structure was investigated.The numerical simulation results show that:the methods of random multi-person walking and fixed multi-person walking with load reduction are suitable for simulating the actual crowd loads;the influence of train excitation on the peak acceleration of the elevated composite floor system cannot be neglected and should be considered through the overall analysis;the vibration serviceability of each pedestrian excitation condition and the coupling condition of train excitation and pedestrian excitation meets standard requirements.
Guangzhou Baiyun Railway Stationlarge railway station building structurevibration serviceabilitypedestrian excitationtrain excitationlarge-span composite floor
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