Structural design guidelines for concrete bridge decks reinforced with corrosion-resistant reinforcing bars.

PDFTech ReportFHWA/VCTIR 15-R10101602Bridge decksStructural designReinforcing barsCorrosion resistanceSteelConcrete bridgesStructural analysisGuidelinesVirginiaVirginia. Dept. of TransportationSalomon, Abraham LamaMoen, Cristopher D.Virginia Center for Transportation Innovation and ResearchUnited States. Federal Highway AdministrationUS Transportation CollectionThis research program develops and validates structural design guidelines and details for concrete bridge decks withcorrosion-resistant reinforcing (CRR) bars. A two-phase experimental program was conducted where a control test set consistentwith a typical Virginia Department of Transportation bridge deck design using Grade 60 steel (ASTM A615, fy= 60 ksi) andepoxy-coated reinforcing steel was compared to deck slab specimens where Grade 60 is replaced with CRR bars.The experimental program was designed to evaluate how flexural performance at service and ultimate limit states areaffected by a one-to-one replacement of Grade 60 with CRR bars, a reduction of concrete clear cover, and a reduction in rebarsize. Structural analysis models were developed using Response 2000 in order to predict the CRR bridge deck moment-curvatureand the moment-crack width relationships.Experimental trends proved to be consistent with the analytical results demonstrating the viability of Response 2000 as adesign tool for reinforced concrete with high-strength and nonmetallic rebar without a defined yield plateau. For reduced bar sizeand clear cover (2.00 in instead 2.50 in), ASTM A1035 and UNS S32304 specimens proved to have similar deformability ratiosand crack widths that comply with current AASHTO requirements, with as much as 36% less steel