周建民, 石海波, 程政.风荷载作用下围护结构表面风压分布及局部体型系数数值模拟研究[J].河南理工大学学报（自然科学版）,2020,39(1):164-172.

ZHOU J M, SHI H B, CHENG Z,et al.Numerical simulation study of wind pressure distribution and local shape coefficient onthe surface of enclosure structure under wind load[J].Journal of Henan Polytechnic University(Natural Science) ,2020,39(1):164-172.

风荷载作用下围护结构表面风压分布及局部体型系数数值模拟研究

周建民, 石海波, 程政

同济大学 建筑工程系，上海200092

摘要:为了从围护结构风压分布和风荷载局部体型系数角度研究建筑围护结构抗风性能，基于计算流体力学方法（CFD），利用scSTREAM平台，分别采用k-ε ， RNG k-ε湍流模型对CARRC 高层建筑标准模型进行模拟，并将数值模拟与试验结果对比分析，验证scSTREAM平台模拟计算的可行性，表明RNG k-ε湍流模型具有更高的计算精度，因此，选择RNG k-ε湍流模型用做后续研究。然后分别建立不同风速、不同建筑体型的模型，研究其对围护结构风压分布、风荷载局部体型系数的影响。结果表明：围护结构风压分布及风荷载局部体型系数受风速影响很小，但随建筑体型改变有明显变化；对于不同高宽比、宽厚比的建筑，围护结构各表面风压分布有较大区别，且出现风荷载局部体型系数取值明显高于规范的情况指出了规范取值的不合理之处，以优化围护结构局部体型系数分区取值。

关键词:围护结构;风压分布;风荷载局部体型系数;计算流体力学;RNG k-ε湍流模型

doi:10.16186/j.cnki.1673-9787.2020.1.21

基金项目:国家重点研发计划项目（2016YFC0700701）

收稿日期:2019/04/09

修回日期:2019/05/21

出版日期:2020/01/15

Numerical simulation study of wind pressure distribution and local shape coefficient onthe surface of enclosure structure under wind load

ZHOU Jianmin, SHI Haibo, CHENG Zheng

Department of Structural Engineering， Tongji University，Shanghai 200092 ， China

Abstract:Wind resistance of enclosure structure was studied from the angles of wind pressure distribution and local shape coefficient of wind load. Based on computational fluid dynamics （ CFD） method and scSTREAM platform， the standard model of high-rise buildings （ CARRC ） was simulated by k-ε and RNG k-ε turbulence models respectively. The feasibility of the simulation calculation of scSTREAM platform was verified by comparing the numerical simulation with the experimental results. The results showed that the RNG k-ε turbulence model had higher calculation accuracy， and the RNG k-ε turbulence model was selected for continued research. Then， models of different wind speeds and different building shapes were established to study their effects on wind pressure distribution and local shape coefficient of wind load. It was concluded that wind pressure distribution and local shape coefficient of wind load of enclosure structure were little affected by the wind speed ， but had obvious changes with the change of building shape. For buildings with different aspect ratios and width-thickness ratios， the distribution of wind pressure on each surface of enclosure structure was quite different ，and the value of the local shape coefficient of wind load was obviously higher than that of the code， and the unreasonable value of the code was point out. This could optimize the partition value of local shape coefficient of enclosure structure.

Key words:enclosure structrue;wind pressure distribution;local shape coefficient of wind load;computational fluid dynamics;RNG  turbulence model

风荷载作用下围护结构表面风压分布及局部体型系数数值模拟研究_周建民.pdf