(哈尔滨工业大学土木工程学院，哈尔滨 150090)

［摘要］基于Fluent软件，采用雷诺应力模型RSM对六种不同体型的联体型双塔建筑物的静力风荷载进行了数值计算。研究了不同体型双塔间的静力干扰效应，顺、横风向和扭转方向的无量纲荷载系数等问题。分析表明，当风向角为0°且间距较近时，下游建筑位于上游建筑的尾流边界内，抑制了上游建筑尾流的发展，因此上游建筑的平均风荷载较单体时有所减小，而下游建筑的“遮挡效应”则非常显著。由于角部的处理，延缓了上游建筑气流的分离和再附，上游建筑的平均弯矩干扰因子IF_m均小于尖角模型的相应值，而下游建筑的IF_m均大于尖角模型的相应值。

［关键词］数值模拟;静力风荷载;联体型双塔建筑;静力干扰效应

Numerical investigation of static wind loads on bridge jointed twin-towered buildings

Zheng Chaorong, Zhang Yaochun(School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China)

Abstract:The static wind loads on six different shapes of bridge jointed twin-towered buildings are numerical computed based upon the fluid analysis software-Fluent, in which Reynolds stress equation mode has been used. In the case of different shapes, some problems related to the bridge jointed twin-towered buildings are investigated, such as the mean interference effects between the twin towers, along-wind load, across-wind load and wind-induced torsion moment of the conjoined buildings and etc. The results indicate that, for the tandem arrangement with small spacing under the wind direction of 0°, the mean wind load of the upstream building can be decreased because the downstream building has suppressed the development of wakes caused by the vortexshedding of the upstream building, and the “shielding effects” of the interfered building is very significant. Moreover, the separation and reattachment of the upstream buildings are delayed because of the treatment of the buildings-corners, so the interference factors for mean base moment (IF_m) of the upstream buildings whose corners are shaved off or concaved are less than those buildings with sharp corners, however, the case is contrary to the IF_m of the downstream buildings.

Keywords:numerical simulation; static wind loads; bridge jointed twin-towered buildings; mean interference effects

*国家自然科学基金重大项目(59895410)。

作者简介：郑朝荣，博士研究生，Email:flyfluid@163.com。

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