Abstract
A dynamic numerical analysis of the wheel forces of a Korea Train express (KTX) vehicle is conducted to investigate the traffic safety of railway bridge. It is carried out to solve the structural responses which is especially focused on either the dynamic amplification factor (DAF; vertical deflections, stresses, moments, and accelerations) of the bridge or the differences of wheel forces (DWF) and three directions rotations of the train while travelling between on the ground and on the pre-stressed concrete (PSC) box bridge with an analysed range of running speeds from 100 km/h to 600 km/h by 10 km/h increments. The numerical finite element method (FEM) with fourth order Runge−Kutta method is used to analyse the traffic safety of the bridge considering wheel-track forces between a 38 degree-of -freedom vehicle model and a track irregularity generated by the power spectral density (PSD) function. It will be proposed as indies of evaluation method (DAF, DWF, and KTX rotations) are recommended as the enforced traffic safety of the existing PSC box bridges due to the increasing speed of next generation KTX.
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