Crack Propagation Assessment of Time-Dependent Concrete Degradation of Prestressed Concrete Sleepers
نویسندگان
چکیده
As prestressed concrete sleepers are continuously exposed to various environmental and loading conditions, it is increasingly crucial analyse their current future serviceability performance. In practice, the main cause of cracking in usually induced by impact loads. The most heavily influenced sections midspan rail-seat area sleepers. This paper investigates effects time-dependent strength degradation on capacity factors affecting analysed order evaluate crack behaviour A finite element modelling approach developed for sleepers, which used assess structural railway sleeper model has been calibrated validated. research firstly discusses using load–crack length responses. It shown that modes an overall increase maximum as age. demonstrates initial loads ultimate lengths have significant change first 20 years. After 40 years service life, resistance becomes very weak only 61.32% new sleeper. long term, load keeps reducing, propagation rate sharp. presented methodology results can greatly assist decision-making repair or replacement aid design considering
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ژورنال
عنوان ژورنال: Sustainability
سال: 2022
ISSN: ['2071-1050']
DOI: https://doi.org/10.3390/su14063217