基于风洞试验的双塔楼超高层建筑风荷载与风致响应

当超高层建筑的高度和间距都比较接近的时候,相互的干扰效应对结构的表面风荷载与结构的风致响应都会产生较大影响。基于刚性模型表面测压风洞试验,得到了双塔楼超高层建筑表面各测点的风压时程。在此基础上,通过数据处理,得到结构的三维动力风荷载模型,进而分别采用频域法进行结构动力响应分析。最后,通过分析结构表面风荷载与风致响应,研究了塔楼之间的干扰对结构风荷载的影响以及对结构风致响应的影响,结果表明:当双塔连线与来流方向平行时,三维风荷载和风致响应都会明显增大,干扰效应影响十分明显。

Investigation on wind loads and wind-induced responses of twin-tower super-high building based on wind tunnel tests of rigid models

The interference effects make a great influence on the wind pressure on the surface and the wind-induced responses of super-high buildings,when the distance between them is short and the heights of them are almost the same.Based on the wind tunnel test of rigid model,the time series of wind pressure on the test points on the surface of the twin-tower super-high building were obtained,and then,the 3-D dynamic wind load model of the building was established by data process procedure.The wind-induced dynamic responses are evaluated based on frequency domain method.The interference effects on the wind loads and wind-induced responses are analyzed.The result shows that when twin-tower is parallel to the flow,wind loads and wind induced responses will increase,and the interference effects are very obvious.