沙尘暴环境中低矮建筑风压特性的数值研究  

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

作　　者：胡荻[1,2] 黄宁 裴斌斌[2,3] Rezaali Pakzad 张洁 Hu Di;Huang Ning;Pei Binbin;Pakzad Rezaali;Zhang Jie(College of Hydraulic and Civil Engineering,Xinjiang Agricultural University,Urumqi 830002,China;Ministry of Education Key Laboratory of Mechanics on Disaster and Environment in Western China;Lanzhou University,Lanzhou 730000,ChinaCollege of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830002 [2]兰州大学西部灾害与环境力学教育部重点实验室,甘肃兰州730000 [3]兰州大学土木工程与力学学院,甘肃兰州730000

出　　处：《中国沙漠》2025年第1期32-43,共12页Journal of Desert Research

基　　金：国家重点研发计划项目(2023YFF1304203);国家自然科学基金项目(42376232,42381164666,52306197,42376245,42106218);新疆维吾尔自治区自然科学基金项目(2024D01B43)。

摘　　要：基于欧拉-拉格朗日模型研究了风沙环境中低矮建筑的风压分布特征。结果表明:风场中沙颗粒的存在减小了平均风速,增大脉动风速,沙粒运动使小尺度涡的能量增加;与净风场相比,挟沙风场中的平均风压系数无明显变化,脉动风压系数增大显著;沙粒的扰动使湍流脉动增强、气流不稳定性增加,屋面的极值风压系数增大6%~10%,且屋面测点间的风压相关性有增大趋势,局部联动出现负压极值而造成围护结构破坏的概率增加;0°和45°风向角模型的非高斯区域均增大50%以上,因此沙尘暴环境中有更多区域的围护结构易发生局部撕裂破坏。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 pres-sures and results in damage of the envelope structures.The area with non-Gaussian characteristics for 0°and 45o 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.

关 键 词：低矮建筑 沙尘暴 风沙两相流 拉格朗日粒子追踪法 风压系数 

分 类 号：X169[环境科学与工程—环境科学]