Experimental and Numerical Investigations of Structural Performance of Slab Track under Hygrothermal Environment

The coupled heat and moisture actions could easily cause deformation, cracking corrosion problems in the slab ballastless track under operational conditions via China Railway Track System (CRTS) Ⅱ. In this paper, two one-quarter-scaled models of CRTS Ⅱ hygro-thermal environment were tested a testing chamber, respectively. To study effect constrained on structural performance structure, temperature distribution, stress displacement scaled with free boundary also compared. Then, field structure was investigated by establishing finite-element model. results showed that transfer between layers has temperature-lag effect. positive negative gradients lower part cement asphalt (CA) mortar layer specimen are smaller than those specimen. longitudinal for is significantly affected concrete base forms difference. Numerical-analysis bottom prone to produce high-temperature core inside an agglomeration KEYWORDS: Slab track, Hygro-thermal environment, Structural performance, Scale model, Finiteelement