The Sheridan Street bridge spans 195 feet in four spans over the Florida Turnpike. The superstructure of the bridge comprises 12 precast prestressed concrete AASHTO Type II beams with a roadway width of 60 feet.
The southbound lane was impacted by an over-height vehicle, causing damage to the exterior beam and four interior beams. Damage was in the form of section concrete loss, exposure of prestressing strands, rupture of prestressing strands, and excessive cracking.
In-house developed software, Smart Bridge Suite, was used to analyze the superstructure, to determine the impact of damage on the structural strength of the beams and to design the rehabilitation work.
Repair work included splicing ruptured prestressing strands, restoring concrete section using polymer modified concrete, using externally bonded longitudinal CFRP sheets and transverse U-wraps. The use of advanced composite materials allowed the damaged beams to be repaired instead of replaced, while providing accelerated construction.
