Volume 3 : Laboratory testing, field testing, and evaluation of a precast concrete bridge : Black Hawk County

775010091Final report.PDFTech ReportIHRB Project TR-561CTRE Project 06-262Precast concreteAccelerated testsStrength of materialsPile capsPiers (Supports)Bridge piersIowaIowa State University. Center for Transportation Research and EducationKlaiber, WayneWipf, TerryWineland, VernonBridge Engineering CenterIowa. Highway Research BoardIowa. Dept. of TransportationIowa State University. Center for Transportation Research and EducationNTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and StructuresNTL-HIGHWAY/ROAD TRANSPORTATION-MaterialsUS Transportation CollectionThe importance of rapid construction technologies has been recognized by the Federal Highway Administration (FHWA) and the IowaDOT Office of Bridges and Structures. Black Hawk County (BHC) has developed a precast modified beam-in-slab bridge (PMBISB)system for use with accelerated construction. A typical PMBISB is comprised of five to six precast MBISB panels and is used on lowvolumeroads, on short spans, and is installed and fabricated by county forces. Precast abutment caps and a precast abutment backwallwere also developed by BHC for use with the PMBISB. The objective of the research was to gain knowledge of the global behavior ofthe bridge system in the field, to quantify the strength and behavior of the individual precast components, and to develop a more timeefficient panel-to-panel field connection. Precast components tested in the laboratory include two precast abutment caps, three differenttypes of deck panel connections, and a precast abutment backwall. The abutment caps and backwall were tested for behavior andstrength. The three panel-to-panel connections were tested in the lab for strength and were evaluated based on cost and constructability.Two PMBISB were tested in the field to determine stresses, lateral distribution characteristics, and overall global behavior