Author(s)

Li Lanxin ¹, Zhang Xuanyi ^1,2

Affiliation(s)

¹ Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing, 100124, China
² Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing, 100124, China

Corresponding Author

Li Lanxin

ABSTRACT

This study systematically investigates the service reliability of the CRTS II (China Railway Track System) ballastless slab track on bridges under the serviceability limit state. The failure modes of each structural layer are comprehensively identified, and corresponding time-dependent limit state functions are established. Based on the logical relationships among these failure modes, a time-dependent system limit state function considering multiple failure mechanisms is formulated. The reliability of the track structure over its service life is analyzed, along with a sensitivity analysis of key parameters under load effects. The results demonstrate that static wheel weight and fastener resistance have significant impacts on the overall reliability of the track structure. Additionally, the degradation coefficient and correction coefficient of the CRTS II slab track play a crucial role in its reliability. These findings provide a theoretical basis and quantitative support for the reliability assessment of CRTS II ballastless slab tracks and offer valuable guidance for track maintenance and repair strategies.

KEYWORDS

CRTS II ballastless slab track; Service limit service; Time-dependent system reliability; Sensitivity analysis; Reliability evaluation

CITE THIS PAPER

Li Lanxin, Zhang Xuanyi, Reliability Evaluation of CRTS II Ballstless Slab Track on Bridge Considering Multiple Important Failure Modes. Journal of Civil Engineering and Urban Planning (2025) Vol. 7: 109-121. DOI: http://dx.doi.org/10.23977/jceup.2025.070114.

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