ABSTRACT
ABSTRACT: An investigation has been conducted on an existing plate girder suspension bridge that has demonstrated wind response problems during its many years of service. Despite several retrofits, it has suffered significant structural damage in several windstorms. The study has involved wind tunnel experiments to identify the problem. Long term measurement of bridge response behavior and site wind conditions, as well as analytical studies, have been conducted in parallel with the experimental work. While special features of the bridge have enabled it to survive, this work has demonstrated that the bridge is prone to several wind instabilities. As a result, fairings were designed for and implemented on the bridge. Monitoring of the post-retrofit behavior is continuing. This paper will provide a description of the unique bridge details and a brief overview of the investigation. Key findings will be summarized. Conclusions will be drawn.
