摘要
采用RNG k-ε湍流物理模型对某复杂体型体育馆的风荷载进行CFD数值模拟。考察0°、45°、90°3种风向对体育馆屋盖表面平均风压系数和体型系数的影响规律,为该结构设计风荷载取值提供参考。结果表明:该复杂体型大跨度体育馆屋盖主要受风压力作用,气泡结构间狭缝区域平均风压系数值较大,0°风向下平均风压系数最大值为1.96。不同风向角下测点平均风压随位置变化差异明显,0°和90°风向下测点平均风压系数最大值差值为1.12。靠近来流方向气泡结构间狭缝对屋盖区域风压有放大效应,体型较大的气泡结构对气流的阻碍效果明显。气泡结构在0°和45°风向下体型系数最小值差值为0.75,体育馆屋盖体型系数受风向变化影响明显。
The CFD numerical simulation for wind load on a complex-shaped gymnasium is carried out by using the RNG k-εturbulence model.The effects of wind direction of 0°,45°and 90°on the mean wind pressure coefficient and shape coefficient of roof surface of the gymnasium were investigated in detail,which provided a reference for the design of wind load on the structure.The results show that the roof of the complex long-span gymnasium is mainly subjected to wind pressure,and the average wind pressure coefficient of the slit area between the bubble structures is larger,and the maximum average wind pressure coefficient can reach 1.96 under 0°wind direction.The mean wind pressure coefficients at different wind directions are significantly different,and the maximum difference between the mean wind pressure coefficients at 0°and 90°wind directions is up to 1.12.The slit between the bubble structures near the incoming flow direction has an amplification effect on the wind pressure in the roof area,and the larger bubble structure has an obvious obstruction effect on the airflow.The minimum difference of the shape coefficient of the bubble structure is 0.75 under the wind direction of 0°and 45°,which shows that the shape coefficient of the gymnasium roof is obviously affected by the wind direction.
作者
张特
李方慧
袁中亚
苏政忠
范佳红
ZHANG Te;LI Fang-Hui;YUAN Zhong-Ya;SU Zheng-Zhong;FAN Jia-Hong(School of Civil Engineering,Heilongjiang University,Harbin 150080,China)
出处
《黑龙江大学工程学报》
2023年第2期72-78,共7页
Journal of Engineering of Heilongjiang University
基金
国家自然科学基金项目(52078380)。
关键词
大跨屋盖
平均风压
风载体型系数
数值模拟
long-span roof
mean wind pressure
wind load shape coefficient
numerical simulation
