Repair of Reinforced Concrete Bridge Columns via Plastic Hinge Relocation Project: Volume 1: Repair Using Conventional Materials

2018Final Report, May 2015 through September 2018PDFTech Report4000(142)Federal #: 4000(142)IRIS #: Z839740000Reinforced concrete bridgesRepairingEarthquake resistant designPlastic hinge relocationBuckled reinforcementFractured reinforcementUnited StatesAlaskaAlaska. Department of Transportation and Public Facilities. Research, Development, and Technology TransferKrish, Zachary F.Kowalsky, Mervyn J.Nau, James M.Seracino, RudolfAlaska. Department of Transportation and Public Facilities. Research, Development, and Technology TransferUnited States. Federal Highway AdministrationUS Transportation CollectionPresented in this report is research aimed at challenging the assumption that severely damaged reinforced concrete bridge columns are not easily repaired. An experimental program was conducted in which six large scale bridge columns exhibiting buckled and fractured reinforcement were repaired using plastic hinge relocation and conventional materials. Discussion of several repair methods is presented along with the introduction of a simplified analytical approach by which the repair can be designed, and repaired member performance obtained. In addition, a rational approach to assessing the limits of residual drift in a damaged system is presented, considering the availability of such a repair