Analyses of Metro Train-Induced Vibration of Building Above Subway Tunnel

To more accurately predict the structural vibration of the building above the subway tunnel due to the train moving on the floating-slab track (FST), a prediction model is established in this paper. The model is developed based on the vehicle-track coupled dynamics and is comprised of two subsystems. The first subsystem is the spatial train-FST coupled dynamic subsystem and the second subsystem is the FST-tunnel-soil-building coupled dynamic subsystem. The relationship between the two subsystems is the dynamic reaction forces supporting the rails. In the first subsystem, the train is marshalled by several vehicles and each vehicle is simplified as multi-rigid-body system with 35 DOFs. In the second subsystem, the subway tunnel, the building above the tunnel and the soil around the tunnel are modelled using finite elements, and the 3D consistent viscous-spring artificial boundaries are applied to mitigate the impact of artificial boundaries on the calculation results.

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