A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Coastal bridges are exposed to severe wind and wave loads during a hurricane. Because the density of water is much larger than the density of air, the magnitude of wave loads is much larger than wind load, and can demolish the bridge superstructure if it was not specifically designed to withstand wave loads. In September 2004, the 2.5-mile-long I-10 twin bridges over Escambia Bay near Pensacola, Florida suffered extensive structural damage during Hurricane Ivan, 58 spans of the eastbound and westbound bridges were knocked off the piers and another 66 spans were misaligned. During Hurricane Katrina in August 2005, several bridges in Louisiana and Mississippi were damaged. The bridge decks were lifted by the large uplift wave load and pushed off the piers by the horizontal wave load. In this research, the uplift wave load is calculated by the velocity potential and diffraction theory with finite difference method. The analytical model is validated by laboratory measurements. The extreme sea state around the damaged I-10 Bridges during Hurricane Ivan, including the wave height, wave period and direction, is hindcasted with wave model SWAN and achieved historical wind data. The calculated wave parameters are then used to calculate the uplift wave load on the superstructure of the I-10 Bridges. The influence of wave height, wave period and water depth on uplift wave load is also investigated.
Coastal bridges are exposed to severe wind and wave loads during a hurricane. Because the density of water is much larger than the density of air, the magnitude of wave loads is much larger than wind load, and can demolish the bridge superstructure if it was not specifically designed to withstand wave loads. In September 2004, the 2.5-mile-long I-10 twin bridges over Escambia Bay near Pensacola, Florida suffered extensive structural damage during Hurricane Ivan, 58 spans of the eastbound and westbound bridges were knocked off the piers and another 66 spans were misaligned. During Hurricane Katrina in August 2005, several bridges in Louisiana and Mississippi were damaged. The bridge decks were lifted by the large uplift wave load and pushed off the piers by the horizontal wave load. In this research, the uplift wave load is calculated by the velocity potential and diffraction theory with finite difference method. The analytical model is validated by laboratory measurements. The extreme sea state around the damaged I-10 Bridges during Hurricane Ivan, including the wave height, wave period and direction, is hindcasted with wave model SWAN and achieved historical wind data. The calculated wave parameters are then used to calculate the uplift wave load on the superstructure of the I-10 Bridges. The influence of wave height, wave period and water depth on uplift wave load is also investigated.
Uplift Wave Load on the Superstructure of Coastal Bridges
Structures Congress 2007 ; 2007 ; Long Beach, California, United States
2007-10-10
Conference paper
Electronic Resource
English
Uplift Wave Load on the Superstructure of Coastal Bridges
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