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http://dx.doi.org/10.12989/sss.2016.17.3.491

Wind and traffic-induced variation of dynamic characteristics of a cable-stayed bridge - benchmark study  

Park, Jae-Hyung (Department of Ocean Eng., Pukyong National University)
Huynh, Thanh-Canh (Department of Ocean Eng., Pukyong National University)
Lee, Kwang-Suk (Department of Ocean Eng., Pukyong National University)
Kim, Jeong-Tae (Department of Ocean Eng., Pukyong National University)
Publication Information
Smart Structures and Systems / v.17, no.3, 2016 , pp. 491-522 More about this Journal
Abstract
A benchmark problem for modal identification of a cable-stayed bridge was proposed by a research team at Hong Kong Polytechnic University. By taking an instrumented cable-stayed bridge as a test bed, nineteen sets of vibration records with known/unknown excitations were provided to invited researchers. In this paper, the vibration responses of the bridge under a series of excitation conditions are examined to estimate the wind and traffic-induced variations of its dynamic characteristics. Firstly, two output-only experimental modal identification methods are selected. Secondly, the bridge and its monitoring system are described and the nineteen sets of vibration records are analyzed in time-domain and frequency-domain. Excitations sources of blind datasets are predicted based on the analysis of excitation conditions of known datasets. Thirdly, modal parameters are extracted by using the two selected output-only modal identification methods. The identified modal parameters are examined with respect to at least two different conditions such as traffic- and typhoon-induced loadings. Finally, the typhoon-induced effects on dynamic characteristics of the bridge are estimated by analyzing the relationship between the wind velocity and the modal parameters.
Keywords
cable-stayed bridge; experimental modal analysis; typhoon-induced; traffic-induced; dynamic characteristics;
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Times Cited By KSCI : 9  (Citation Analysis)
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