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http://dx.doi.org/10.12989/sss.2016.17.3.391

Mode identifiability of a multi-span cable-stayed bridge utilizing stabilization diagram and singular values  

Goi, Y. (Department of Civil and Earth Resources Engineering, Kyoto University)
Kim, C.W. (Department of Civil and Earth Resources Engineering, Kyoto University)
Publication Information
Smart Structures and Systems / v.17, no.3, 2016 , pp. 391-411 More about this Journal
Abstract
This study investigates the mode identifiability of a multi-span cable-stayed bridge in terms of a benchmark study using stabilization diagrams of a system model identified using stochastic subspace identification (SSI). Cumulative contribution ratios (CCRs) estimated from singular values of system models under different wind conditions were also considered. Observations revealed that wind speed might influence the mode identifiability of a specific mode of a cable-stayed bridge. Moreover the cumulative contribution ratio showed that the time histories monitored during strong winds, such as those of a typhoon, can be modeled with less system order than under weak winds. The blind data Acc 1 and Acc 2 were categorized as data obtained under a typhoon. Blind data Acc 3 and Acc 4 were categorized as data obtained under wind conditions of critical wind speeds around 7.5 m/s. Finally, blind data Acc 5 and Acc 6 were categorized as data measured under weak wind conditions.
Keywords
benchmark study; cable-stayed bridge; cumulative contribution ratio; operational modal identification;
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Times Cited By KSCI : 2  (Citation Analysis)
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