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author:

Li, Dong (Li, Dong.) [1] (Scholars:李栋) | Lu, Leiyu (Lu, Leiyu.) [2] | Huang, Hongwei (Huang, Hongwei.) [3] | Qiu, Yi (Qiu, Yi.) [4] | Deng, Xiaowei (Deng, Xiaowei.) [5] | Liu, Changjiang (Liu, Changjiang.) [6]

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Abstract:

Extreme winds, such as typhoons, can lead to serious vibration and damage for flexible membrane roofs. An understanding of the aeroelastic behavior experienced by membrane structures during typhoons is therefore significant to allow well designed in practice. This paper investigates the aeroelastic response of umbrella shaped membrane structures under typhoon experimentally and numerically. The flexible scaled model is tested in typhoon field simulated in wind tunnel to investigate the aeroelastic characteristics varying with wind velocities and wind directions, including displacement response, non-Gaussian characteristics, frequency, modal shape and damping ratios et al. The full coupled fluid-structure interaction numerical model proposed is benchmarked and expanded in parameter discussions. The results indicate that non-Gaussian characteristics appear significant with positive skewness in pressure region and negative skewness in suction region. The probabilistic distribution proves leptokurtic type with kurtosis beyond three. The displacement response in statistics increases almost linearly with wind velocity while the non-Gaussian characteristics remain robust. The high-order mode shapes can be excited in typhoon, and their frequencies and damping ratios vary with wind velocities. The effects of both wind velocity and membrane pretension are proved to be more remarkable than rise-span ratio. This study can address the deficiency of current studies and provisions on the dynamic response of membrane structures in typhoons. © 2024 Elsevier Ltd

Keyword:

Aerodynamics Flexible structures Gaussian distribution Membrane structures Wind stress

Community:

  • [ 1 ] [Li, Dong]College of Civil Engineering, Fuzhou University, Fuzhou; 350116, China
  • [ 2 ] [Li, Dong]Key Laboratory of Fluid and Power Machinery (Xihua University), Ministry of Education, Chengdu; 610039, China
  • [ 3 ] [Lu, Leiyu]College of Civil Engineering, Fuzhou University, Fuzhou; 350116, China
  • [ 4 ] [Huang, Hongwei]College of Civil Engineering, Fuzhou University, Fuzhou; 350116, China
  • [ 5 ] [Qiu, Yi]College of Civil Engineering, Fuzhou University, Fuzhou; 350116, China
  • [ 6 ] [Deng, Xiaowei]Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong, 999077, China
  • [ 7 ] [Liu, Changjiang]School of Civil Engineering, Guangzhou University, Guangzhou; 510006, China

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Source :

Journal of Building Engineering

Year: 2024

Volume: 98

6 . 7 0 0

JCR@2023

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ESI Highly Cited Papers on the List: 0 Unfold All

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30 Days PV: 0

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