A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Vibrations of Cable-Stayed Bridges
Recently, cable-stayed bridges have become very common in the United States. However, the cables of many of these structures have experienced unforeseen vibrations causing significant damage to what were relatively new structures. The damage in some cases has cost state departments of transportation millions of dollars to inspect, maintain, and repair. Perhaps even more perplexing than the cost of the repairs is the question: why were the vibrations unforeseen? For many years, vortex shedding, occurring around the cables such as what occurred with the Tacoma Narrows Bridge (except around the girder deck system), was thought to have been causing the problem. Recently, another phenomenon termed rain-wind induced vibration was found to be causing the problem. But was rain-wind induced vibration really causing the problem or were there other factors involved that could have eliminated the problem from the beginning? This paper examines two such bridges that have experienced vibrational problems requiring major repair. These bridges are the Cochrane Bridge in Mobile, Alabama and the Talmadge Memorial Bridge in Savannah, Georgia. An understanding of structural vibrations and the importance of the need to properly design critical connections is vital, when designing and constructing cost effectively flexible structures, such as cable-stayed bridges.
Vibrations of Cable-Stayed Bridges
Recently, cable-stayed bridges have become very common in the United States. However, the cables of many of these structures have experienced unforeseen vibrations causing significant damage to what were relatively new structures. The damage in some cases has cost state departments of transportation millions of dollars to inspect, maintain, and repair. Perhaps even more perplexing than the cost of the repairs is the question: why were the vibrations unforeseen? For many years, vortex shedding, occurring around the cables such as what occurred with the Tacoma Narrows Bridge (except around the girder deck system), was thought to have been causing the problem. Recently, another phenomenon termed rain-wind induced vibration was found to be causing the problem. But was rain-wind induced vibration really causing the problem or were there other factors involved that could have eliminated the problem from the beginning? This paper examines two such bridges that have experienced vibrational problems requiring major repair. These bridges are the Cochrane Bridge in Mobile, Alabama and the Talmadge Memorial Bridge in Savannah, Georgia. An understanding of structural vibrations and the importance of the need to properly design critical connections is vital, when designing and constructing cost effectively flexible structures, such as cable-stayed bridges.
Vibrations of Cable-Stayed Bridges
Palmquist, S. M. (author)
Fourth Forensic Engineering Congress ; 2006 ; Cleveland, Ohio, United States
Forensic Engineering (2006) ; 364-373
2006-10-03
Conference paper
Electronic Resource
English
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