Global ETD Search
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Showing 1 to 4 of 4 for “"rail seat deterioration"”.
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Hydraulic Mechanisms of Concrete-Tie Rail Seat Deterioration
Rail seat deterioration (RSD) is considered the most critical problem with concrete-tie performance on North American freight railroads. RSD is the deterioration of the concrete underneath the rail that results in problems such as wide gauge, insufficient rail cant, and loss of fastening toe load. …
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Damage assessment in reinforced concrete using contactless ultrasound
… (delamination, distributed microcracking, and rail seat deterioration) in concrete structures. The work comprises new hardware system design and testing approach development. The hardware, comprising the modified sensors and the automation/robotic scanning system, are designed and assembled by …
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Quantification of rail seat load distributions on concrete crossties
As higher demands are placed on North American railroad infrastructure by heavy haul traffic, it is increasingly important to understand the factors affecting the magnitude and distribution of load imparted to concrete crosstie rail seats. The rail seat load distribution is critical to the analysis …
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The mechanics of abrasion on concrete crosstie rail seats
A sustained increase in gross rail loads and cumulative freight tonnages on heavy haul railways, as well as increased interest in high and higher-speed passenger rail development, is placing an increasing demand on railway infrastructure and its components. Several failure mechanisms are limiting …