防灾减灾工程学报2018，Vol.38Issue(1)：30-38,9.DOI:10.13409/j.cnki.jdpme.2018.01.005
大跨度多肢屋盖风荷载特性试验与模拟研究
Experimental Study and Numerical Simulation of Wind Load Characteristics on a Long-span Multiple Roof Structure
摘要
Abstract
The new terminal of Chengdu Tianfu Airport is a complex super large-span roof but the corresponding value of wind loads have not been specified in the current Chinese wind code.Therefore,this study reported herein investigates the wind load characteristics of this complex large-span roof under 24 wind directions through combined wind tunnel tests and numerical simulations.Also,the accuracy and ef fectiveness of Computational Fluid Dynamics (CFD) on this issue is validated and verified as compared to the wind tunnel measurements.The results indicate that the wind loads on this roof is generally negative,and particularly large magnitudes of negative pressures are observed on limbs of this roof due to and corners.It is,therefore,suggested that more attention should be paid to the limb regions during wind resistant design.The mean wind pressure coefficient achieves-1.4 under the unfavorable wind direction of 270°.The influence of wake on the experimental terminal can be ignored under 0° direction because of low-rise buildings surrounded.The negative wind pressure coefficient is large in the middle but small at both ends along the roof.In addition,the mean wind pressure coefficients simulated using the numerical wind tunnel a gree well with experimental measurements.关键词
大跨度多肢屋盖/平均风压/脉动风压/数值模拟Key words
long-span roof/mean wind pressure/fluctuating wind pressure/numerical simulation分类
建筑与水利引用本文复制引用
李正良,刘堃,薛冀桥..大跨度多肢屋盖风荷载特性试验与模拟研究[J].防灾减灾工程学报,2018,38(1):30-38,9.基金项目
国家自然科学基金项目(51278511)资助 （51278511）
