고속철도 콘크리트궤도의 체결구 강성 최적화

In order to guarantee the economical efficiency in railway track, it is very important to determine the fastener stiffness which is capable of minimizing the total cost which consists of the cost of electric energy dissipated due to traction and track maintenance cost. In this study, the methods evaluating the energy cost and the maintenance cost with the track stiffness in the concrete track of high speed line are respectively presented. The optimal value for the vertical track stiffness is sought out by handling the previously established parallel equations corresponding to the respective costs. The optimal vertical dynamic stiffness of rail pad in concrete track of high speed line is evaluated as 33.6 kN/㎜. It is notified that this value is internationally in the range of common use in the design of HSR concrete track.