Title page for ETD etd-08012012-040418

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
  • Bridges
Date of Defense 1988-05-15
Availability restricted
This 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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