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Jun 20, 2012
Effect of Cable Vibration on Aerostatic Response and Dynamics of a Long Span Cable-Stayed Bridge
Authors: Rujin Ma [email protected], Xinzhong Chen [email protected], and Airong Chen [email protected]Author Affiliations
Publication: New Horizons and Better Practices
Abstract
In this study, the static response and dynamic modal properties of a cable-stayed bridge with a main span of 1088m under strong winds are addressed focusing on the effect of cable vibration on overall bridge behavior. Two modeling systems for stay cables are considered in the finite element modeling of the overall bridge, i.e., one element cable system (OECS) and multiple element cable system (MECS). The aerostatic analysis under varying wind speeds and angles of attack is conducted with an iterative procedure taking into account the nonlinearities of wind forces and cables. The modal analysis is then performed under the statically deformed conditions to quantify the changes in bridge modal properties with increasing wind speed. The analysis results are further compared with the measurements using a full aeroelastic bridge model in a wind tunnel. The results of this study revealed the importance of using the MECS for accurate modeling and response prediction of long span cable-stayed bridges to strong winds.
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© 2007 American Society of Civil Engineers.
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Published online: Jun 20, 2012
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Department of Bridge Engineering, Tongji University, Shanghai, P.R. China. E-mail: [email protected]
Department of Civil and Environmental Engineering, Texas Tech University, Lubbock, Texas. E-mail: [email protected]
Department of Bridge Engineering, Tongji University, Shanghai, P.R. China. E-mail: [email protected]
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