Date: November, 2006
Location: Staunton, Virginia. Interstate 81 Southbound at Route 994 Overpass
Contractor: Lanford Brothers
Engineer: Virginia Department of Transportation, Chuck Snyder and Jungi Meng PHD, PE
Concrete bridge columns are an integral part of the integrity of highway bridges that may be damaged by various physical forces including earthquakes and vehicle accidents. Vertical effects on these bridge columns lead to significant variations in axial force demand which can result in fluctuations in moment demands at the face of the bent cap, amplification of moment demands at the girder mid-span, and changes to moment and shear capacity of the column.
In this case, a concrete column had been struck by traffic several times creating shear stress cracking in column.
Concrete column has been struck by traffic several times creating shear stress cracking in column. Cracks were wrapped in 0° and 90° directions.
Material Used: Fortress Stabilization 300 gsm unidirectional Carbon Fiber Fabric with 4550 Epoxy Resin
The use of Fortress Carbon Fabric restored compression and shear capability of column that was damaged. Column repair was completed in 6 hours.