Field measurement and wind tunnel experimental investigation of a supertall building with closely spaced modes under typhoon Mangkhut
This paper presents the analysis of full-scale measurement of the Leatop Plaza (303m) under a super typhoon (i.e., Mangkhut), during which field data such as wind speed, wind direction, and wind-excited structural response were recorded. The modal properties, e.g., natural frequency, damping ratios,...
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sg-ntu-dr.10356-1590332022-05-30T02:26:45Z Field measurement and wind tunnel experimental investigation of a supertall building with closely spaced modes under typhoon Mangkhut Pan, Haoran Au, Siu-Kui Fu, Jiyang Xu, An He, Yuncheng School of Civil and Environmental Engineering Engineering::Civil engineering Supertall Building Wind-Induce Effects Full-Scale Measurement Modal Analysis Wind Tunnel Test This paper presents the analysis of full-scale measurement of the Leatop Plaza (303m) under a super typhoon (i.e., Mangkhut), during which field data such as wind speed, wind direction, and wind-excited structural response were recorded. The modal properties, e.g., natural frequency, damping ratios, of the building at consecutive short time windows are identified using a Bayesian frequency domain approach, which provides information on the most probable value and identification (estimation) uncertainty. Time-varying and amplitude-dependent features of natural frequencies and damping ratios are investigated, taking into account identification uncertainty. The power spectral density of modal wind load identified from field data also provides an opportunity for benchmarking with the prediction from wind tunnel tests developed at the design stage. As Leatop Plaza has similar stiffness and mass properties along the two horizontal directions, the frequencies of corresponding vibration modes are very similar, which inevitably poses a challenge to modal identification. Issues associated with closely spaced modes are highlighted and further studied via a recently developed theory of achievable precision of ambient modal identification. Submitted/Accepted version This work was supported by grants from the National Natural Science Foundation of China (Grant No. 51925802), the 111 Project (Grant No. D21021), the Overseas Master Program of Guangdong Province, China (2020A1414010079), and the Guangzhou Municipal Science and Technology Project (Grant No. 20212200004). These supports are gratefully acknowledged. 2022-05-30T02:26:45Z 2022-05-30T02:26:45Z 2022 Journal Article Pan, H., Au, S., Fu, J., Xu, A. & He, Y. (2022). Field measurement and wind tunnel experimental investigation of a supertall building with closely spaced modes under typhoon Mangkhut. Journal of Wind Engineering & Industrial Aerodynamics, 226, 105033-. https://dx.doi.org/10.1016/j.jweia.2022.105033 0167-6105 https://hdl.handle.net/10356/159033 10.1016/j.jweia.2022.105033 226 105033 en Journal of Wind Engineering & Industrial Aerodynamics © 2022 Elsevier Ltd. All rights reserved. This paper was published in Journal of Wind Engineering & Industrial Aerodynamics and is made available with permission of Elsevier Ltd. application/pdf |
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Engineering::Civil engineering Supertall Building Wind-Induce Effects Full-Scale Measurement Modal Analysis Wind Tunnel Test Pan, Haoran Au, Siu-Kui Fu, Jiyang Xu, An He, Yuncheng Field measurement and wind tunnel experimental investigation of a supertall building with closely spaced modes under typhoon Mangkhut |
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This paper presents the analysis of full-scale measurement of the Leatop Plaza (303m) under a super typhoon (i.e., Mangkhut), during which field data such as wind speed, wind direction, and wind-excited structural response were recorded. The modal properties, e.g., natural frequency, damping ratios, of the building at consecutive short time windows are identified using a Bayesian frequency domain approach, which provides information on the most probable value and identification (estimation) uncertainty. Time-varying and amplitude-dependent features of natural frequencies and damping ratios are investigated, taking into account identification uncertainty. The power spectral density of modal wind load identified from field data also provides an opportunity for benchmarking with the prediction from wind tunnel tests developed at the design stage. As Leatop Plaza has similar stiffness and mass properties along the two horizontal directions, the frequencies of corresponding vibration modes are very similar, which inevitably poses a challenge to modal identification. Issues associated with closely spaced modes are highlighted and further studied via a recently developed theory of achievable precision of ambient modal identification. |
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School of Civil and Environmental Engineering |
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School of Civil and Environmental Engineering Pan, Haoran Au, Siu-Kui Fu, Jiyang Xu, An He, Yuncheng |
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Article |
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Pan, Haoran Au, Siu-Kui Fu, Jiyang Xu, An He, Yuncheng |
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Pan, Haoran |
title |
Field measurement and wind tunnel experimental investigation of a supertall building with closely spaced modes under typhoon Mangkhut |
title_short |
Field measurement and wind tunnel experimental investigation of a supertall building with closely spaced modes under typhoon Mangkhut |
title_full |
Field measurement and wind tunnel experimental investigation of a supertall building with closely spaced modes under typhoon Mangkhut |
title_fullStr |
Field measurement and wind tunnel experimental investigation of a supertall building with closely spaced modes under typhoon Mangkhut |
title_full_unstemmed |
Field measurement and wind tunnel experimental investigation of a supertall building with closely spaced modes under typhoon Mangkhut |
title_sort |
field measurement and wind tunnel experimental investigation of a supertall building with closely spaced modes under typhoon mangkhut |
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2022 |
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https://hdl.handle.net/10356/159033 |
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1734310190554021888 |