Finite Element Analysis of Static Behavior of Concrete Slab Track Subjected to Differential Settlement of Subgrade and Its Effect on Train-Track-Subgrade Dynamic Interaction

초록

In this study, to explore the static behavior of concrete slab track subjected to differential settlement of subgrade and its effect on train-track-subgrade dynamic interaction, and to establish the maintenance strategy of concrete slab track, a framework for numerical analysis has been developed. First, a nonlinear analysis on the static behavior of the track concrete slab and sub-base subjected to differential settlement has been performed to evaluate the reduction of bending stiffness of the slab and sub-base due to damage, the track irregularity and the depth of void between base and subgrade. Second, the train-track-subgrade dynamic interaction analysis, considering track irregularity, reduction of bending stiffness and void between base and subgrade obtained from the static analysis, has been carried out to investigate the behavior of train and track in the viewpoint of running safety, ride comfort and serviceability.