Title:
Shear Strengthening of Beams on the Sunshine Skyway Bridge Trestle Spans with CFRP
Author(s):
Atiq H. Alvi
Publication:
Symposium Paper
Volume:
346
Issue:
Appears on pages(s):
51-67
Keywords:
AASHTO Type IV girders, carbon fiber reinforced polymer (CFRP), cracking, debonding, strengthening
DOI:
10.14359/51730493
Date:
1/1/2021
Abstract:
The Sunshine Skyway Bridge is recognized as the State of Florida’s “flagship bridge.” The goal of the Florida Department of Transportation (FDOT) and specifically its entity that maintains the Skyway Bridge, the District 1 & 7 Structures Maintenance Office (DSMO), is to extend the life of this bridge to 100 years. Beam cracking on the trestle spans have been noted since the 1990s. In 2005 the DSMO initiated an in-depth study to determine the cause of cracking and to recommend a repair procedure. Upon completion, a committee of FDOT staff
from various key offices in the State, along with consultant experts, determined criteria to address these cracks. The
repairs included epoxy crack injection, penetrant sealer, and carbon fiber reinforced polymer (CFRP) wrap installation. FDOT addressed the repairs in three phases. The first repair project was in 2009, the second in 2013, and the third and final began in 2019.
Related References:
1. Shahawy, Mohsen. (2005), “Cracking Investigation of the Girders of the Skyway Trestle Spans Bridge No. 150189.” SDR Engineering Consultants. Report for Florida Department of Transportation District 1&7 Structures Maintenance Office, Tampa, FL.
2. The American Association of State Highway and Transportation Officials AASHTO Standard Specification for Highway Bridges
3. Hamilton III, H. R., Llanos, G., Ross, B. (2009), “Shear Performance of Existing Prestressed Concrete Bridge Girders.” University of South Florida. Report for Florida Department of Transportation Structures Research Center, Tallahassee, FL.
4. Florida Department of Transportation Structures Research Center. (2006). “Initial Report on Testing of Simulated Skyway.” Tallahassee, FL.
5. Kobayashi, K., Kanakubo, T., and Jinno, Y. (2004). “Seismic Retrofit of Structures Using Carbon Fibers,” VIII Simposio Nacional De Ingenieria Sismica, pp. 1-21.
6. American Concrete Institute ACI 440.2R-08—Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures
7. National Cooperative Highway Research Program NCHRP Report 678, Design of FRP Systems for Strengthening Concrete Girders in Shear