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。
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.
出处
《建筑结构》
CSCD
北大核心
2011年第11期125-130,共6页
Building Structure
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
tall buildings
synchronization pressure wind tunnel test
numerical simulation
static interference effect
