【作者】 黄鹏； 顾明；

【Author】 HUANG Peng, GU Ming(State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092,China)

【机构】 同济大学土木工程防灾国家重点实验室；

【摘要】 在TU-1风洞中,采用高频动态天平技术对两个形状相同的方形截面高层建筑间的静力和动力干扰效应进行了试验研究,得到了各种工况条件下的顺风向静力干扰因子IF_m和顺、横风向动力干扰因子IF_dx、IF_dy以及峰值扭转响应干扰因子IF_t。讨论了风场紊流度对动力干扰效应的影响,并通过分析受扰建筑的基底弯矩谱研究了动力干扰效应的机理。最后应用BP人工神经网络方法对试验结果进行了模拟和推广,给出了IF_m、IF_dx和IF_dy的等值线图,可供规范参考。更多还原

【Abstract】 In this paper, two tall building models with square cross-sections are experimentally studied in TJ-1 Boundary Layer Wind Tunnel with high-frequency-force-balance technique to investigate the interference effects on mean and dynamic response. The mean interference factors (IFm), along-wind and across-wind dynamic interference factors (IFdx, IFdy) and peak torque interference factors (IFt) are presented for different configurations. The influences of turbulence in oncoming wind on dynamic interference factors are analyzed. Then the mechanism on dynamic interference effects is discussed by analysing the interfered model’s overturning moment power spectra. At last the artificial neural networks method is used to deal with the experimental data and the IFm, IFdx, and IFdy contour maps are finally obtained, which may be used as reference for wind load codes.更多还原