Research on Fatigue Damage Evolution of the Base Plate Structure of China Railway Track System III Type Slab Ballastless Track under Heavy Haul Train Load
Source abstract
Abstract
To meet the transportation requirements of heavy-haul trains, it is necessary to consider the use of prestressed reinforced concrete ballastless tracks. Therefore, the CRTSIII SBT (China Railway Track System III-type slab ballastless track) has been considered for its convenient construction and geometric adjustment. Considering the problems existing in the base plate of CRTSIII SBT in heavy-haul applications, an indoor test and simulation were conducted to explore the cracking phenomenon of the base plate concrete under fatigue load. The reliability of the simulation was verified through the experimental results. A fatigue crack development law of the base plate structure was established. Furthermore, the influence of the load position, the thickness of self-compacting concrete and axle loads on the fatigue damage of the base plate structure were investigated. For the CRTSIII SBT subjected to heavier axle loads, it is appropriate to thicken the self-compacting concrete layer and strengthen the concrete and steel reinforcement at the plate end to reduce fatigue damage and cracks. The research results can serve as a basis for the optimization of the CRTSIII SBT base plate structure in heavy-haul railway applications.
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Research context
OpenAlex topics: Railway Engineering and Dynamics · Structural Load-Bearing Analysis · Geotechnical Engineering and Underground Structures
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Civil Engineering, Central South University, Changsha 410075, China
MOE Key Laboratory of Engineering Structures of Heavy Haul Railwa, Central South University, Changsha 410075, China
Southeast Coastal Railway (Fujian) Co., Ltd., Fuzhou 350001, China
Department of Civil Engineering, Faculty of Engineering, Ahmadu Bello University Zaria, Zaria 800242, Kaduna State, Nigeria
Information Engineering School, Nanchang University, Nanchang 330031, China
Funding
the Scientific Research Test Project of China Railway Corporation · Natural Science Foundation of Hunan Province, China · High-Speed Railway Foundation Joint Fund Project
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