Journal
JOURNAL OF BRIDGE ENGINEERING
Volume 18, Issue 7, Pages 587-600Publisher
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)BE.1943-5592.0000394
Keywords
Cable-stayed bridges; Wind loads; Structural health monitoring; Buffeting; Comparative studies; Cable-stayed bridges; Buffeting performance; Kaimal spectrum; Measured wind spectrum; Time-domain analysis; Structural health monitoring
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Funding
- National Science Foundation of China [50725828]
- National Science Foundation of China for Young Scholars [50908046]
- Southeast University
- Priority Academic Program Development Foundation of Jiangsu Higher Education Institutions
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The recent development in structural health monitoring (SHM) technology enables the buffeting responses of bridges to be evaluated in a more realistic manner. In this paper, the buffeting responses of the cable-stayed Sutong Bridge with a main span of 1,088 m is analyzed with the wind spectra used in the design phase and those obtained experimentally from a long-term SHM system to compare the actual buffeting response with design predictions. The autospectra of longitudinal and vertical fluctuating wind components are derived from the in situ strong wind data recorded by the monitoring system. The buffeting analysis is accomplished in the time domain with the aeroelastic effect included. Compared with the buffeting responses obtained from the measured spectrum, the girder responses from the design spectrum are larger in the horizontal direction and smaller in other directions, whereas the tower responses are larger and thus relatively conservative.
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