摘要
合景大厦体型复杂,在数值模拟与风洞试验结果比较的基础上,主要用数值风洞模拟方法研究了该大厦所受风荷载的特点。通过多种方案的计算分析发现:大厦屋顶大面积悬臂结构对总体风荷载影响较大,但开口后可适当减小悬臂结构上的平均风荷载,也可大大减少其脉动风压;弧形墙侧边悬臂结构对整体风荷载的影响小,但应重视其局部风压的取值;大厦弧形表面可有利于减小迎风面的最大平均风压,而周围环境对合景大厦风荷载的影响很大。
The shape of Hejing high-rise building is very complex. Based on the comparison between wind loads obtained with numerical simulation and wind tunnel test, the characteristics of wind loads on Hejing building was analyzed mainly by numerical simulation method. Through the computation on different building shapes it was found that the cantilevered structures on the top of the building had a great effect on the resultant wind loads. The openings on the cantilevered structures could reduce both mean and fluctuating wind loads. Although the cantilevered structures on the sides of the building had little effect on the whole wind forces, the local pressure could be very large on these structures. The curve surfaces of the building could help to decrease the maximum value of wind pressure when the wind came in the direction to the surface. The surrounding buildings greatly influenced the wind loads on Hejing building.
出处
《结构工程师》
2006年第6期68-72,77,共6页
Structural Engineers
关键词
风荷载
数值风洞模拟
风洞试验
高层建筑
悬臂结构
rwind load, numerical simulation, wind tunnel test, high-rise building, cantilevered structure
