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Journal of Desert Research ›› 2025, Vol. 45 ›› Issue (1): 32-43.DOI: 10.7522/j.issn.1000-694X.2024.00090

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Numerical simulation study on the wind pressure characteristics of low-rise buildings in sandstorm environment

Di Hu1,2a(), Ning Huang2a,2b, Binbin Pei2a,2b, Pakzad Rezaali2a,2b, Jie Zhang2a,2b()   

  1. 1.College of Hydraulic and Civil Engineering,Xinjiang Agricultural University,Urumqi 830002,China
    2a.Ministry of Education Key Laboratory of Mechanics on Disaster and Environment in Western China /, Lanzhou University,Lanzhou 730000,China
    2b.College of Civil Engineering and Mechanics, Lanzhou University,Lanzhou 730000,China
  • Received:2024-05-20 Revised:2024-07-10 Online:2025-01-20 Published:2025-01-13
  • Contact: Jie Zhang

Abstract:

Based on Eulerian-Lagrangian method, the wind pressure characteristics of low-rise buildings in sand-laden wind were studied. The results show that the motion of sand particles weakens the mean wind speed, while strengthens the fluctuation of wind, representing as the increasing energy of small-scale vortices. The mean wind pressure coefficients in the sand-laden wind have no obvious change compared with the results of the clean wind, but the fluctuating pressure coefficients increase obviously. Due to the enhancement of turbulent pulsation in the sand-laden wind, the peak wind pressure coefficients on the roof increases by 6% to 10%. Moreover, the spatial-correlation of wind pressure increases, which raises the probability of local-linkage peak negative pressures and results in damage of the envelope structures. The area with non-Gaussian characteristics for 0° and 45° wind angle models in the sand-laden wind is significantly enhanced by more than 50%, meaning that more local-tearing-failure of envelope structures may occur in a sandstorm.

Key words: low-rise buildings, sandstorm, wind sand two-phase flow, Lagrangian particle tracking method, wind pressure coefficient

CLC Number: