Analysis on Fatigue Life of CA Mortar Used in CRTS-I Slab Ballastless Track

According to the structural and mechanical characteristics of CRTS-I slab ballastless track,the rail was assumed to be a beam discretely supported at points,the fastener and foundation's elasticity was assumed as springs,the track slab,CA mortar and base slab were respectively assumed as solid object. Then the finite element model of CRTS-I track slab was established. On the basis of Palmgren-Miner linear cumulative fatigue damage criterion,the life-cycle analysis method was utilized to analyze the fatigue lives of CA mortar under different train loads. Eventually,the CA mortar layer's fatigue life distribution and fatigue life values at dangerous points were acquired.