Probabilistic Methodologies for Prediction of Post-Earthquake Bridge Repair Cost and Repair Times

Abstract eng:
A new step-by-step probabilistic methodology, based on local linearization of the damage to repair quantity model, evaluates the repair costs and repair times for bridge components at varying degrees of damage. This local linearization repair cost and time methodology (LLRCAT) is compared to existing methodologies that use the Fourway graphical tool, and that are based on Monte Carlo simulation. LLRCAT requires a data structure to organize bridge-specific repair actions, quantities, and costs. Performance groups are defined for bridge components and subassemblies that are repaired together. This information is implemented using six spreadsheets for bridge material and spatial information, structural response, component damage states, repair methods and repair quantities, unit costs, and labor production rates. The results of using LLRCAT are illustrated using repair cost and repair time fragilities for an example multi-span reinforced concrete highway overpass bridge in California.

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