The dynamic load effect of the concrete floor slab in urban transportation hub cannot be ignored

and the existing structural design codes have not givencorresponding provisions.The insite tests were carried out on the concrete floor slabs of a large-scale urban transportation hub under the action of heavy-loaded public transit vehicles.The dynamic responses including structural strain and displacement were collected and then the dynamic amplification factor（DAF）was estimated.The experimental results show that the tested dynamic responses of displacement and strain were obviously higher than that induced by the same loads which were statically placed on the floor slab.The DAF increases first and then decreases with the driving speed of the public transit vehicles.The results also show that the range of DAF derived from strain measurements islargerthan that of the displacement measurements.The study based on the field measurements can provide knowledge for DAF estimationof the large-span concrete floor slabs.