两栋复杂体型超高层建筑间的气动干扰效应分析

Aerodynamic Interference Effect on Two Actual High-Rise Buildings

基于两栋相邻很近且横截面复杂的超高层建筑的刚性模型测压风洞试验,分析了建筑的综合体型系数、脉动响应系数和峰值响应系数,详细讨论了两建筑间的气动干扰机理。研究结果表明:两栋塔楼在气流方向上串列布置时,其间可能产生恒定的旋涡,上游建筑的平均风荷载会大大超过单体建筑的情况;两栋塔楼在气流方向上大致并列布置时,建筑两侧可能产生周期性的旋涡脱落,导致横风向响应的均方根值较大。

With wind pressure spontaneous measure technique, rigid models of two high-rise buildings with complicated section in diamond arrangement are tested to obtain comprehensive shape coefficients, fluctuating response coefficients and peak response coefficients in order to explain interference effects on these buildings. The results indicate that a constant vortex would exist between these buildings in side-by-side arrangement, and wind load on upstream building would largely exceed the single both sides of these buildings in parallel arrangement increases sponse. one. Besides, periodic vortex shedding from RMS coefficients of across-wind dynamic response.