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Wind and Structures Volume 20, Number 2, February 2015 , pages 293-314 DOI: https://doi.org/10.12989/was.2015.20.2.293 |
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Wireless monitoring of typhoon-induced variation of dynamic characteristics of a cable-stayed bridge |
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Jae-Hyung Park, Thanh-Canh Huynh and Jeong-Tae Kim
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| Abstract | ||
| In this paper, wireless monitoring of typhoon-induced variation of dynamic characteristics of a cable-stayed bridge is presented. Firstly, cable-stayed bridge with the wireless monitoring system is described. Wireless vibration sensor nodes are utilized to measure accelerations from bridge deck and stay cables. Also, modal analysis methods are selected to extract dynamic characteristics. Secondly, dynamic responses of the cable-stayed bridge under the attack of two typhoons are analyzed by estimating relationships between wind velocity and dynamic characteristics. Wind-induced variations of deck and cable vibration 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 random properties of the dynamic responses under the typhoons. | ||
| Key Words | ||
| wireless monitoring; typhoon-induced variation; dynamic characteristics; cable-stayed bridge | ||
| Address | ||
| Jae-Hyung Park, Thanh-Canh Huynh and Jeong-Tae Kim: Department of Ocean Engineering, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 608-737, Republic of Korea | ||