Abstract
This study proposes the combining second-order fourth-moment and outcrossing method for evaluating the time-variant reliability of slab tracks’ interlayer damage. The merit of the method is to improve significantly the computing efficiency and accuracy for the implicit and strong nonlinear limit state function. Furthermore, the effects of narrow joints damage and temperature load on the time-variant reliability of slab tracks’ interlayer damage are investigated. Narrow joints damage is an inducement for the decrease of time-variant reliability index of slab tracks’ interlayer damage, and the index decreases more violently with the increase of temperature rise than that of positive temperature gradient.
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