Title: THE DEVELOPMENT OF A STEEL SLEEPER SYSTEM FOR HEAVY HAUL RAILWAYS
Abstract: This paper deals with the design and testing of a steel sleeper for use under 35 tonnes axle loads, where up to 90 MGT is transported annually. The design is based principally on a fatigue analysis in which the sleeper is considered as a beam with welded abutments and subsequently as a beam on elastic foundation. Consideration is taken of dynamic effects, the distribution of axle load into a group of sleepers and the different ranges of load on a sleeper. Other factors which are discussed include provision of cant and of longitudinal restraint, centre binding and vertical track buckling. Laboratory fatigue testing of the sleeper was undertaken to provide a basis for evaluating and improving the design. Prototypes were tested in a ballast bed and their performance was monitored by measuring strain md subsidence into the ballast and by inspection of the sleepers and rail fasteners with crack detection equipment. Various rail fasteners and insulation systems for use under high axle load conditions were developed and evaluated. Insulation materials were tested for mechanical and electrical properties and stability to U-V radiation. Fasteners were tested to give appropriate rail restraint and fatigue life.
Publication Year: 1978
Publication Date: 1978-01-01
Language: en
Type: article
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Cited By Count: 1
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