A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Using Carbon Fiber Reinforced Polymers (CFRP) to Strengthen the Sunshine Skyway Bridge
The Sunshine Skyway Bridge is one of the most recognized structures in the United States. With its signature bright yellow stay cables, the bridge resembles a sailboat, with its towers holding up the triangular sails across Tampa Bay in Florida. The Sunshine Skyway Bridge is comprised of the main span, the high level approach, and the low level trestle spans. A total of 650 precast concrete girders support the northbound trestle spans and another 650 girders support the southbound trestle spans. AASHTO Type IV girders were used for a majority of the 100 ft. long trestle spans. Shear cracking was observed during routine inspections of the bridge. The Sunshine Skyway Bridge was designed for a 75-year life span and the presence of shear cracks in the concrete girders less than 20 years after the bridge opened was a cause for concern. Any cracks in the concrete girders could provide a direct access for chlorides and moisture to the prestressed strands. In order to restore the shear deficiencies at the end of the AASHTO girders, a bidirectional carbon fiber fabric was used to wrap the members. Most of the repairs for this project took place from a barge under the bridge thereby eliminating any traffic concerns on the bridge. The bridge was successfully strengthened with CFRP to meet the Florida DOT requirements at a cost approximately $1.6 million and took approximately 8 months to complete.
Using Carbon Fiber Reinforced Polymers (CFRP) to Strengthen the Sunshine Skyway Bridge
The Sunshine Skyway Bridge is one of the most recognized structures in the United States. With its signature bright yellow stay cables, the bridge resembles a sailboat, with its towers holding up the triangular sails across Tampa Bay in Florida. The Sunshine Skyway Bridge is comprised of the main span, the high level approach, and the low level trestle spans. A total of 650 precast concrete girders support the northbound trestle spans and another 650 girders support the southbound trestle spans. AASHTO Type IV girders were used for a majority of the 100 ft. long trestle spans. Shear cracking was observed during routine inspections of the bridge. The Sunshine Skyway Bridge was designed for a 75-year life span and the presence of shear cracks in the concrete girders less than 20 years after the bridge opened was a cause for concern. Any cracks in the concrete girders could provide a direct access for chlorides and moisture to the prestressed strands. In order to restore the shear deficiencies at the end of the AASHTO girders, a bidirectional carbon fiber fabric was used to wrap the members. Most of the repairs for this project took place from a barge under the bridge thereby eliminating any traffic concerns on the bridge. The bridge was successfully strengthened with CFRP to meet the Florida DOT requirements at a cost approximately $1.6 million and took approximately 8 months to complete.
Using Carbon Fiber Reinforced Polymers (CFRP) to Strengthen the Sunshine Skyway Bridge
Illig, Greg (author) / White, Dave (author)
Structures Congress 2010 ; 2010 ; Orlando, Florida, United States
Structures Congress 2010 ; 676-688
2010-05-18
Conference paper
Electronic Resource
English
Using Carbon Fiber Reinforced Polymers (CFRP) to Strengthen the Sunshine Skyway Bridge
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