온도변화에 따른 PSC침목 휨 거동 분석

Curling due to temperature change has been widely studied in concrete pavements, concrete slab track, however, it has not been investigated in the curling behavior of prestressed concrete sleepers. As high speed trains pass through the ballasted track where curling of PSC sleepers occurs in due to the daily temperature gradient, bending moment not considered in design may additionally occur in the rail seat and center section of sleeper. In this study, some strain gauges and thermocouples are installed in the PSC sleeper on the high speed railway, and then flexural behavior of the main sections was checked. As a result of the analysis, the curling and moment variation for the PSC sleeper according to temperature change were confirmed.