Location: Louisville, KY
The Sherman Minton Bridge carries I-64 EB and WB over the Ohio River between New Albany, IN and Louisville, KY. This bridge has two 800’ long fracture critical double-decker steel tied arch truss spans. During the course of the in-depth bridge inspection, critical defects were encountered in the fracture critical steel arch ties that prompted an emergency closure of this bridge. Michael Baker International mobilized to assist INDOT with identifying a solution to return the bridge back into service. An extremely aggressive schedule was identified and our design team quickly investigated six alternates to determine feasibility, constructability, schedule and cost – all concurrently. A 3D finite element model was developed to determine the feasibility of each alternative, including post-tensioning the tie, a tie replacement, and adding bolted steel plating to the tie girder. The alternative that called for installing bolted steel plates along the full length of each of the 800’ arch ties was selected. The final contract documents were developed and advertised for construction just one week later.