United States Department of Transportation
i
Bridge-in-a-Backpack(TM). Task 2 : reduction of costs through design modifications and optimization.
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2011-09-01
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[PDF-12.61 MB]
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Abstract:The cost effective use of FRP composites in infrastructure requires the efficient use of the
composite materials in the design. Previous work during the development phase and
demonstration phase illustrated the need to refine the design methods for portions of these types
of structures. Three parts were included in this task aimed at reducing costs through design
modifications and optimization. They include improvements to the soil-structure interaction
analysis methods, identification and/or design of a stronger decking material to span between the
arches, and other advanced modeling tools. In the case of advanced modeling tools, it has been
shown that a very important portion of the loading history of the arches includes the concrete
filling of the tubes during construction. A majority of this report explains the evaluation and
modeling of unfilled, hollow tubes to create a knowledge base and design methodology where
the tubes could be safely analyzed for filling loads.
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