Wireless monitoring of typhoon-induced variation of dynamic characteristics of a cable-stayed bridge

다국어 초록 (Multilingual Abstract)

In this paper, wireless monitoring of typhoon-induced variation of dynamic characteristics of acable-stayed bridge is presented. Firstly, cable-stayed bridge with the wireless monitoring system isdescribed. Wireless vibration sensor nodes are utilized to measure accelerations from bridge deck and staycables. Also, modal analysis methods are selected to extract dynamic characteristics. Secondly, dynamicresponses of the cable-stayed bridge under the attack of two typhoons are analyzed by estimatingrelationships between wind velocity and dynamic characteristics. Wind-induced variations of deck and cablevibration responses are examined based on the field measurements under the two consecutive typhoons,Bolaven and Tembin. Finally, time-varying analyses are performed to investigate non-stationary randomproperties of the dynamic responses under the typhoons.

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