［摘 要］对实际超高层建筑群进行了群体和单体塔楼两次同步测压风洞试验，通过两次试验测量结果，考察风向及塔楼位置对顺、横风向和扭转方向的主体结构承受平均风荷载的影响。同时，进行了CFD数值模拟研究。通过试验结果与数值模拟结果的对比分析，验证了数值模拟的可靠性，结合风压试验结果及CFD计算结果对建筑群干扰效应进行了分析和干扰机理说明。研究结果表明，对于建筑基底力而言数值模拟计算结果偏小，但是无量纲静力干扰因子数值计算和试验结果符合得很好，数值模拟计算可以用于风荷载干扰效应的定性分析。处于中间位置的2号塔楼风荷载静力干扰效应明显，干扰放大作用显著。
［关键词］群体超高层建筑；同步测压风洞试验；数值模拟；静力干扰效应
中图分类号：TU973.32 文献标识码：A文章编号：1002-848X(2011)11-0125-06
Numerical study and tests on wind-induced mean interference effects of staggered tall buildings
Yang Liguo, Tang Yi, Jin Xinyang(CABR Technology Co., Ltd., China Academy of Building Research, Beijing 100013, China)
Abstract:To research the interference effects of wind loads on a real project with three similar-shaped staggered tall buildings, wind tunnel tests about the three tall buildings and one isolated tower were conducted respectively. The mean pressure distributions in wind attacks were calculated through constructing appropriate CFD numerical models. Then the results of numerical prediction and the data of the wind tunnel test are compared, and it is found that they are in good agreement. Finally, comparison of the measured results, effects of wind directions and building positions on the design wind forces for main wind-force resisting system, i.e., along-wind, cross-wind and torsion wind loads, are discussed. Interference mechanisms were analyzed by integrating CFD simulated results and experiment measured data. It indicates that numerical simulation on wind-induced mean interference effects is appropriate by qualitative analysis. Wind loads of the middle tower, named tower 2, are greatly increased compared to isolated cases.
Keywords：tall buildings; synchronization pressure wind tunnel test; numerical simulation; static interference effect
作者简介：杨立国（1981-），男，工程师，研究方向：结构风工程,Email：ylgairx@tom.com。
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