Warping Features of Ballastless Track-Slab Under Debonding-Repaired Condition

Abstract:

Based on the construction technology of the debonding repairment applied to the high speed railway ballastless track， the interlayer interfaces were simulated by adapting cohesive element based on the bilinear cohesive zone model， and a finite element model of II slab track of China railway track system （CRTS） was established with full consideration of multi-interface bonding properties. The warping features of the ballastless track-slab were calculated and analyzed at the temperature gradient loads from -50 ℃·m^-1 to ＋100 ℃·m^-1 and the temperature change loads from －30 ℃ to 30 ℃， respectively. The results show that within the range of the temperature loads in this paper， under the debonding-repaired condition， the warping modes and the warping extremes of the track-slab are consistent with the normal state， which indicates that the debonding repairment has restored the warping of the track-slab.