Repair of CR 514 Bridge over I-75 in Sumterville, Florida was completed by SDR. The bridge was struck by an over-height truck, causing severe damage to the exterior prestressed concrete girders, including rupture of several prestressing strands.

Before SDR’s involvement, it was determined to replace the girder. SDR was tasked to assess the damage and its impact on the structural integrity of the girders using its in-house developed damage assessment tools, design of the repair, and develop repair details. Repair of the girders included splicing of ruptured prestressing strands, correcting alignment and rotation of the bottom flange, restoring the concrete section, substituting ruptured stirrups using Near-Surface-Mounted technique, and applying externally bonded CFRP to confine the restored section and to provide redundancy to the shear strength. These repair methods allowed I-75 to remain open during construction.