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(哈爾濱工業(yè)大學(xué)土木工程學(xué)院，哈爾濱 150090)

［摘要］基于Fluent軟件，采用雷諾應(yīng)力模型RSM對(duì)六種不同體型的聯(lián)體型雙塔建筑物的靜力風(fēng)荷載進(jìn)行了數(shù)值計(jì)算。研究了不同體型雙塔間的靜力干擾效應(yīng)，順、橫風(fēng)向和扭轉(zhuǎn)方向的無(wú)量綱荷載系數(shù)等問(wèn)題。分析表明，當(dāng)風(fēng)向角為0°且間距較近時(shí)，下游建筑位于上游建筑的尾流邊界內(nèi)，抑制了上游建筑尾流的發(fā)展，因此上游建筑的平均風(fēng)荷載較單體時(shí)有所減小，而下游建筑的“遮擋效應(yīng)”則非常顯著。由于角部的處理，延緩了上游建筑氣流的分離和再附，上游建筑的平均彎矩干擾因子IF_m均小于尖角模型的相應(yīng)值，而下游建筑的IF_m均大于尖角模型的相應(yīng)值。

［關(guān)鍵詞］數(shù)值模擬;靜力風(fēng)荷載;聯(lián)體型雙塔建筑;靜力干擾效應(yīng)

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

*國(guó)家自然科學(xué)基金重大項(xiàng)目(59895410)。

作者簡(jiǎn)介：鄭朝榮，博士研究生，Email:flyfluid@163.com。

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