Innovative Bridge Designs for Rapid Renewal (2014) / Chapter Skim
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4C h a p t e r 1 problem Statement and research Objective Bridge deterioration and replacement continue to be ongoing problems in the United States. Accelerated bridge construction (ABC)
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5construction requires careful evaluation of bridge requirements, site constraints, and an unbiased review of total costs and benefits. This project takes the approach that for ABC to be successful, ABC designs should allow maximum opportunities for general contractors to do their own prefabrication at staging areas adjacent to project sites or in their yards using their crews.
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6• Precast decks; • Precast modular abutment systems; • Precast complete pier systems; • Segmental columns and piers; • Above-deck driven carriers; • Launched temporary truss bridge; • SPMTs and other wheeled carriers; and • Launching, sliding, and lateral shifting. ABC design concepts have been classified into five tiers, based on mobility impact time, as follows: • Tier 1: Traffic impacts within 1 to 24 hours.
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7developed by the R04 team from the Phase I investigations are described in Chapter 2 with concept sketches and photographs. Chapter 3 contains the results of the engineering and constructability evaluations of the ABC concepts detailed in Chapter 2, as well as a short list of concepts that could be advanced to the ABC design and implementation phase.
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