Life-Cycle Cost Analysis for Short- and Medium-Span Bridges
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2019-05-01
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Edition:Final report
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Abstract:Life-cycle cost analysis (LCCA) has been defined as a method to assess the total cost of a project. It is a simple tool to use when asingle project has different alternatives that fulfill the original requirements. Different alternatives could differ in initialinvestment, operational and maintenance costs among other long term costs. The cost involved in building a bridge depends uponmany different factors. However, long-term cost need to be considered to estimate the overall cost of the project and determine itsLCC. Without watchful consideration of the long-term costs and full life-cycle costing, current investment decisions that lookattractive could be resulting in a waste of economic resources in the future. This research is focused on short and medium spanbridges (between 30 ft and 130 ft) which represents 57% of the NBI INDIANA bridge inventory. Bridges are categorized in threedifferent groups of span ranges. Different superstructure types are considered for both concrete and steel options. Types consideredinclude: bulb tees, AASHTO prestressed beams, slab bridges, prestressed concrete box beams, steel beams, steel girders, foldedplate girders and simply supported steel beams for dead load and continuous for live load (SDCL). A design plan composed ofsimply supported bridges and continuous spans arrangements was carried out. Analysis for short and medium span bridges inIndiana based on LCCA is presented for different span ranges and span configurations. Results will help designers to consider themost cost-effective bridge solution for new projects, resulting in cost savings for agencies involved.
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