Dynamic interaction between a moving vehicle and a bridge
Theoretical model and application of a complex mass-spring system, moving across a simply supported bridge
M.G.C. Jol (TU Delft - Civil Engineering & Geosciences)
Karel N. Dalen – Mentor (TU Delft - Dynamics of Structures)
A.B. Farăgău – Mentor (TU Delft - Dynamics of Structures)
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Abstract
When a vehicle moves across a bridge, there is always an interaction between the vehicle and the bridge and within the vehicle itself. It is important to predetermine the vibrations in the bridge and vehicle. This way, the Ultimate Limit State (ULS) and Serviceability Limit State (SLS) can be more accurately determined, compared to a static approach. Ultimate Limit State refers to the safety of the bridge and vehicle. Serviceability Limit State refers to the usability of the bridge and comfort of the passengers. The behaviour of a bridge subjected to a moving load has been researched before. In these studies, the moving vehicle was simplified to a one or two degrees of freedom mass-spring system, which might be insufficient. This thesis aims to investigate the influence of a multiple degrees of freedom oscillator, where the wheels, bogies and wagons are taken into account in the model. The main goal for this thesis is to investigate and describe the vibrations when a vehicle crosses a bridge. More specifically, the importance of the inertia of the vehicle will be assessed for the serviceability limit state (SLS), and ultimate limit state (ULS).