超高混凝土烟囱风荷载体型系数试验研究

Experimental study on wind load shape factor of supper-high concrete chimney

随着近年来大量高度270 m以上的超高混凝土烟囱的建设,现行烟囱设计规范关于风荷载设计的参数不再完全适用。针对于此,本文通过风洞试验,对超高混凝土烟囱风荷载体型系数进行了研究和分析,分别分析了有无周边建筑下烟囱风荷载体型系数规律。同时利用计算流体动力学(CFD)方法研究了烟囱的体形系数,考虑周围建筑的干扰效应,模拟出烟囱全表面的风压信息以及周围流场的特性,可供类似超高烟囱设计参考。

As more and more supper high concrete chimneys with a height above 270 m have been build,the parameters regarding wind load design in the latest chimney design codes are no longer fully applicable.In view of this,through the wind tunnel test,wind load shape factor of supper high concrete chimney is studied,and the rule of wind load shape factor of chimney with or without surrounding buildings is analyzed.At the same time,the CFD method is used to study the shape factor of the chimney.Considering the interference effect of the surrounding buildings,the wind pressure information on the entire surface of the chimney and the characteristics of the surrounding flow field are simulated.The results can be used as a reference for design of similar super high chimneys.