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

doi:10.7522/j.issn.1000-694X.2024.00090

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 Huang^2a^,^2b, Binbin Pei^2a^,^2b, Pakzad Rezaali^2a^,^2b, Jie Zhang^2a^,^2b()

^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

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:

X169

Di Hu, Ning Huang, Binbin Pei, Pakzad Rezaali, Jie Zhang. Numerical simulation study on the wind pressure characteristics of low-rise buildings in sandstorm environment[J]. Journal of Desert Research, 2025, 45(1): 32-43.

Figures/Tables 13

Fig.1 Computational domain and boundary conditions

Fig.2 Schematic diagram of mesh generation：（A） global grid，（B） local grid， and （C） boundary layer grid

Fig.3 Survey point layout on the roof （A）， windward side and leeward side （B）， and two sides （C）， and two sections are defined for the ensuing analyses （D）： section M （1-2-3-4） and section N （5-6-7-8）

Fig.4 Determination of statistical time

Fig.5 Wind field characteristics

Fig.6 The mean wind pressure coefficients of section M （1-2-3-4，A） and section N （5-6-7-8，B）

Fig.7 The fluctuating wind pressure coefficients of section M （1-2-3-4，A） and section N （5-6-7-8，B）

Fig.8 Instantaneous streamlines and particle velocity vector diagrams on symmetric （A） and 0.6L horizontal plane （B） at 0° wind angle

Fig.9 The peak wind pressure coefficients of the roof at 7.98 I （A，0°）， 7.98 S （B，0°）， 12.65 I （C，45°） and 12.65 S （D，45°）

Fig.10 The correlation of wind pressure coefficients at points P1 （A） and P7 （B） on the roof

Fig.11 Statistical results of Skewness and Kurtosis （A）， Skewness for 7.98 I （B）， Skewness for 7.98 S （C）， Kurtosis for 7.98 I （D）， and Kurtosis for 7.98 S （E） at 0° wind angle

Fig.12 Statistical results of Skewness and Kurtosis （A）， Skewness for 12.65 I （B）， Skewness for 12.65 S （C）， Kurtosis for 12.65 I （D）， and Kurtosis for 12.65 S （E） at 45° wind angle

Table 1 P-values of significance test

风向角	偏度	峰度
0°	0.004	3.75×10^-15
45°	3.29×10^-6	7.72×10^-9

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

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