Flexural Anchorage Performance at Diagonal Crack Locations [Final Report]

2010PDFTech ReportHiggins, ChristopherTriska, Mary AnnGoodall, JoshuaOregon State University. Department of Civil, Construction, and Environmental EngineeringOregon. Department of TransportationOregon. Dept. of Transportation. Research SectionOregonAnchoragesCrackingCracking of concrete pavementsReinforcing steelReinforcing barsMathematical modelsReinforced concreteFHWA-OR-RD-11-06SPR 661Final reportLarge numbers of reinforced concrete deck girder bridges that were constructed during the interstate system expansion of the 1950s have developed diagonal cracking in the stems. Though compliant with design codes when constructed, many of these bridges have flexural steel bars that were cut off short of the full length of the girders. When load-rating these structures, the current design specification check of tension reinforcement anchorage often controls the capacity of these bridges. The tensile force demand is controlled by the load-induced moment and shear, the number of stirrups, and the diagonal crack angle; however, little information is available regarding bond stresses developed with larger-diameter bars for full-size specimens in the presence of diagonal cracks.95