Abstract/Details

Mechanics-based model to predict ballast-related maintenance timing and costs


1994 1994

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Abstract (summary)

A mechanics-based model has been developed which predicts the timing of required ballast maintenance based on track settlement and roughness. With user-defined track material properties, loading characteristics, and maintenance technique to be applied, the model determines the rate of track roughness increase and applies the desired maintenance when such roughness exceeds a limit. This analysis is continued, usually over the life of the ballast, and the related life cycle cost is calculated. For another ballast material or maintenance technique, a lower or higher cost may be realized.

In this way, the model user may observe the effect upon ballast maintenance and cost of using concrete rather than wood ties, a heavier axle load, or increasing the track stiffness. Because the life cycle cost is used, the frequent mistake of determining purchasing decisions based upon the least cost in the present is avoided. Instead, the model allows the user to optimize by considering the associated costs incurred during the component life.

Indexing (details)


Subject
Civil engineering
Classification
0543: Civil engineering
Identifier / keyword
Applied sciences
Title
Mechanics-based model to predict ballast-related maintenance timing and costs
Author
Chrismer, Steven Mark
Number of pages
249
Publication year
1994
Degree date
1994
School code
0118
Source
DAI-B 55/03, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
Advisor
Selig, Ernest T.
University/institution
University of Massachusetts Amherst
University location
United States -- Massachusetts
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
9420610
ProQuest document ID
304101035
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/304101035
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