Interpreting Aeroelastic Models of Cable‐Stayed Bridges

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Abstract
Wind‐tunnel models of long‐span bridges have been exploited in various forms since the late 1930s, and the state of the art has progressed in a parallel fashion. With the rapid increase in the number of new cable‐stayed designs worldwide, new occasions to review the aeroelastic theory and practice of bridge wind‐tunnel modeling have arisen. In particular, the new cable‐stayed bridges have distinct vibration modal forms that are a direct reflection of the design philosophy behind this type of structure. The new modal forms present new challenges to modeling and its interpretation. In this context, the present paper offers a critical examination of the mechanisms involved in the windtunnel modeling of bridges. The method employed is based on flutter derivatives obtained experimentally from deck section models.

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