Repair of steel beam/girder ends with ultra high strength concrete (phase I) : final report.
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2015-06-06
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Edition:Final report
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Abstract:The end corrosion in steel girders at the bearings due to joint leakage is a
significant problem in many of the old bridges around the nation. This critical
damage impairs the shear and bearing capacities of girders. Research has been
conducted investigating a novel method for retrofitting the corroded ends of steel
bridge girders using ultra-high performance concrete (UHPC) encasings. The repair
involves casting thin UHPC panels on each side of the girder web. Shear studs welded
to undamaged portions of the web and flange engage the UHPC panels and provide an
alternate load path. This repair method is expected to be superior to the current
practice of attaching steel cover plates. It can be easier to design and install,
reduce obstruction to traffic during the repair, prevent future corrosion to the
girder end, and reduce the total cost of repair. To investigate the effectiveness of
the repair in recovering the capacity of the corrosion damaged girders, three largescale
experiments were performed on the undamaged, damaged and repaired rolled
girders. This report presents results of these experiments, describes the finite
element analysis (FEA) model, compares the model results to the tests, and describes
the performance of the full-scale FEA.
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