Analysis on Vehicle-induced Vibration Response of Urban Rail Transit"Bridge and Construction Integration"Elevated Station
In order to study the structural vibration caused by a train passing through the"bridge-construction-integration"station at different speed,no load and full load,taking a"bridge-construction-integration"elevated station as an example,a finite element structure coupling dynamic analysis model of vehicle-track-station is established to analyze the dynamic response results of B-type train applied to station building structure and structure reaction on train at 80～120 km/h.And the comfort level is evaluated.The results show that when the B-type train passes through the station at 80～120 km/h,the vertical and lateral vibration acceleration of the train and the ride comfort of the train all meet the limit requirements of the specifications.The vertical response of track-bearing floor is greater than the lateral response,and the vertical displacement and vertical acceleration are little with the speed change.The lateral displacement and lateral acceleration increase first and then decrease with the speed increase.The maximum vertical response of the station hall floor is greater than its horizontal response,the maximum lateral displacement increases first and then decreases with the increase of vehicle speed,and the maximum horizontal and vertical accelerations increase with the speed increase.By comparing the theoretical calculation result with the field measured data of"bridge and construction integration,the reliability of finite element simulation of spatially coupled vibration is verified,which can provide a reference for the calculation and analysis of similar elevated station structures.
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