刘慕广　何勇　谢壮宁

摘   要：基于高頻测力天平风洞试验，分析了实际工程中矩形高层建筑风致干扰产生的原因. 在此基础上，研究了两矩形高层建筑不同空间位置下的气动干扰效应. 结果显示：矩形高层建筑风荷载的干扰放大效应主要是其侧后方正交布置的另一矩形高层建筑导致，且这一矩形建筑处于受扰建筑下游时产生的干扰效应明显高于处于上游的情形. 沿受扰建筑的侧方和后方增大两矩形高层的间距比，风荷载干扰效应整体呈递减的趋势，加速度干扰效应呈先增大后减小的趋势. 施扰建筑在受扰建筑侧方移动时的干扰范围和强度均要高于在受扰建筑后方移动时的情形. 受扰建筑顺风向体型系数的最大干扰因子可达1.41. 干扰效应也会显著增大受扰建筑横风向的体型系数，以单体状态顺风向体型系数归一化的干扰因子为1.08. 进一步考虑动力放大作用后，受扰建筑顺风向和横风向基底弯矩的干扰因子可分别达到1.49和2.28，加速度的干扰因子最大可达1.23.

关键词：高层建筑;气动干扰;风洞试验;风效应;矩形断面

中图分类号：TU973.213;TU317.1              文献标志码：A

Wind-induced Interference Effects between

Two Rectangular High-rise Buildings

LIU Muguang?，HE Yong，XIE Zhuangning

（State Key Laboratory of Subtropical Building Science，South China University of Technology，Guangzhou 510641，China）

Abstract：Based on high-frequency force balance wind tunnel tests，the reason for the interference effects on rectangular high-rise buildings in actual engineering was investigated. On this basis，the aerodynamic interference effects of two rectangular high-rise buildings in different spatial positions were studied. The results show that the interference amplification effect of the wind loads on principal rectangular buildings is mainly caused by another rectangular high-rise building located at the side and back of the principal building with orthogonal arrangement，and the interference effect of interfering rectangular building in the downstream region of principal building is significantly higher than that in the upstream region. By increasing the spacing ratio of the two rectangular high-rises along the side and rear of the principal building，the wind load interference effect tends to decrease overall，and the acceleration interference effect first increases and then decreases. Furthermore，the interference range and intensity of the interfering building moving on the side of the principal building are higher than that moving behind the disturbed building. The maximum interference factor （IF） of the downwind shape coefficient of principal building is 1.41. The interference effect also significantly increases the lateral average wind load of principal building. The lateral interference factor （IF） normalized by the along-wind shape coefficient of single building can be up to 1.08. After further considering the dynamic amplification effect，the IFs of the base moment of principal building at the along-wind and across-wind direction are 1.49 and 2.28，respectively，and the maximum acceleration IF of the building is 1.23.

Key words：high-rise building;aerodynamic interference;wind tunnel test;wind effect;rectangular section

高层建筑群间存在复杂的干扰效应[1]，产生风致干扰的因素众多，建筑的横断面形状是其中一个关键的影响因素. 作为高层建筑中最为常见的方形和矩形断面，当前研究工作多以此类截面为对象开展. 谢壮宁、顾明等[2-5]对方形高层建筑间的干扰效应进行了系统性的研究，分别……