Life-cycle assessment of Nebraska bridges.

Life-cycle assessment of Nebraska bridges.

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    NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures ; NTL-HIGHWAY/ROAD TRANSPORTATION-Construction and Maintenance ; NTL-PLANNING AND POLICY-Management Systems ;
  • Abstract:
    Life-cycle cost analysis (LCCA) is a necessary component in bridge management systems (BMSs) for assessing investment decisions and identifying the most cost-effective improvement alternatives. The LCCA helps to identify the lowest cost alternative that accomplishes project objectives by providing critical information for the overall decision-making process. The main objective of this project is to perform LCCA for different maintenance strategies using the developed deterioration models and updated cost data for Nebraska bridges. Deterministic and probabilistic LCCA using RealCost software for deck overlay decisions, expansion joint replacement decisions, and deck widening versus deck replacement decisions are presented. For deck overlay decision, silica fume overlay, epoxy polymer overlay, and polyester overlay are compared against bare deck with respect to life cycle cost for variable structural life. In expansion joint replacement decisions, two alternatives are compared: relocating abutment expansion joints at the grade beam; and replacing abutment expansion joints at the same place. Deck widening is compared with deck replacement in five different bridges.
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