Full-scale measurements on buffeting response of Sutong Bridge under typhoon Fung-Wong

The full-scale of bridge buffeting response is essential to the research of bridge wind engineering. Sutong Cable-stayed Bridge (SB) is the longest cable-stayed bridge in the world, and it was attacked by Typhoon Fung-Wong in July 2008. During the typhoon period, full-scale was conducted to record wind velocities; structural health monitoring system (SHMS) was used to collect the structural vibration responses. In this paper, the measured data are studied using spectral analysis and statistical method. The study includes the analyses of wind characteristics on bridge site and the response characteristics of stay cable and the deck, the relationship of vibrations and wind speed, the comparison of upstream and downstream cable vibrations, the effectiveness of cable dampers and so forth. The results can be employed to validate the current buffeting response calculation method, and provide references for wind-resistant design of the super-long-span cable-stayed bridges.