Developing a probable cost analysis model for comparing bridge deck rehabilitation methods

This study investigates the probable service life and Life Cycle Cost (LCC) of three types of bridge decks used by the Wyoming Department of Transportation (WYDOT). It uses a population of 53 WYDOT bridge decks to estimate probable service life and probable LCC for construction including maintenance. These findings are used to include variability and uncertainty in estimations of present values and Equivalent Uniform Annual Costs (EUACs) for three types of bridge deck rehabilitations. All variables including service life estimate, inflation rate, construction costs, nominal discount rate, etc. used to evaluate present value and EUACs of bridge decks are treated as random variables. To accomplish this, a Monte Carlo simulation method is employed to develop the probability cost analysis models of present values and EUACs.