Type of Document Master's Thesis Author Venkatakrishnan, C. P. URN etd-08012012-040418 Title Life cycle approach to bridge design Degree Master of Science Department Industrial Engineering and Operations Research Advisory Committee
Advisor Name Title Fabrycky, Wolter J. Committee Chair Beliveau, Yvan J. Committee Member Freeman, H. JoAnne Committee Member Keywords
Date of Defense 1988-05-15 Availability restricted AbstractThis thesis deals with the application of the Life Cycle concept to the design of
bridges. Its focus is on methodology rather than on any particular application, with
emphasis on the preliminary design stage.
With the help of conceptual equations for the construction, maintenance, and vehicle
delay costs, a procedure for making decisions at the preliminary design stage is
presented. Decisions are made on the basis of minimum present equivalent total
cost and include the number of lanes to be provided, the span between piers, and the
design alternative (type of bridge) to be adopted for detail design. Minimization is
done by a total enumeration procedure.
Sensitivity of the decisions with respect to the interest rate and the study period is
analyzed, and design decision reversals are noted. This includes a joint sensitivity analysis with respect to these design independent parameters. Limited analysis of
errors in cost estimating equations is also performed.
A FORTRAN code, implementable on mainframe and personal computers is developed
to aid calculations.
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