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水平肋板对高层建筑气动特性的影响研究

蒋媛 刘锦阳 回忆 刘锐

蒋媛, 刘锦阳, 回忆, 刘锐. 水平肋板对高层建筑气动特性的影响研究[J]. 西南交通大学学报. doi: 10.3969/j.issn.0258-2724.20230584
引用本文: 蒋媛, 刘锦阳, 回忆, 刘锐. 水平肋板对高层建筑气动特性的影响研究[J]. 西南交通大学学报. doi: 10.3969/j.issn.0258-2724.20230584
JIANG Yuan, LIU Jinyang, HUI Yi, LIU Rui. Impact of Horizontal Ribs on Aerodynamic Characteristics of High-Rise Buildings[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20230584
Citation: JIANG Yuan, LIU Jinyang, HUI Yi, LIU Rui. Impact of Horizontal Ribs on Aerodynamic Characteristics of High-Rise Buildings[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20230584

水平肋板对高层建筑气动特性的影响研究

doi: 10.3969/j.issn.0258-2724.20230584
基金项目: 国家自然科学基金项目(52078087);中国电建集团成都院科技项目(P49321,PA2202)
详细信息
    作者简介:

    蒋媛(1986—),女,高级工程师,研究方向为建筑风工程,E-mail:42239064@qq.com

    通讯作者:

    刘锦阳(1991—),男,讲师,博士,研究方向为建筑风工程,E-mail:2296454851@qq.com

  • 中图分类号: TU355

Impact of Horizontal Ribs on Aerodynamic Characteristics of High-Rise Buildings

  • 摘要:

    为分析高层建筑上外伸肋板的抗风工作机理,利用大涡模拟(LES)评估大气边界层来流下水平肋板对高层建筑的流场和风荷载的影响,对比不同类型水平肋板的抗风效果. 结果表明:水平肋板明显抑制了侧风面分离涡的形成,并拉长了尾涡;肋板会显著抑制建筑附近的竖向流,并在其附近诱导形成局部旋涡,最终导致近壁流动形式明显变化;流场的变化会影响风压分布和风荷载,水平肋板使建筑表面平均风压系数沿高度呈“之”字形分布,水平板明显降低侧壁面上平均和脉动风压,最大降幅分别约为20%和17%;对总荷载而言,水平肋板对平均阻力无明显影响,但能明显降低建筑上的脉动升力,最大降幅为27%;肋板的布置形式对气动特性的影响也明显差异,连续水平板通过改变近壁流、涡结构来影响风压分布和风荷载,而间隔水平板对风荷载的影响相对较弱.

     

  • 图 1  模型示意

    Figure 1.  Sketch of models

    图 2  网格布局和计算域

    Figure 2.  Mesh configuration and computing domain

    图 3  风场特征[22-23]

    Figure 3.  Wind field characteristics [2223]

    图 4  方柱压力分布及验证

    Figure 4.  Pressure distribution on square column and verification

    图 5  不同高度处水平截面上的平均流线和平均流速

    Figure 5.  Mean streamlines and mean flow velocity on horizontal sections at different heights

    图 6  竖直截面上(y = 0D)的平均流线和平均流速

    Figure 6.  Mean streamlines and mean flow velocity on vertical sections (y = 0D

    图 7  迎风面中心线上风压分布

    Figure 7.  Distribution of wind pressure on windward centerline

    图 8  侧风面上风压分布

    Figure 8.  Distribution of wind pressure on sidewall

    图 9  模型表面平均风压分布

    Figure 9.  Mean wind pressure distribution on model surface

    表  1  肋板尺寸信息

    Table  1.   Dimension information of ribs

    模型编号d/D/%b/D//%h/D//%
    1650.0
    225.0
    312.5
    42025.0
    56025.0
    下载: 导出CSV

    表  2  网格信息

    Table  2.   Mesh information

    网格 最小网格 最大网格 数量 /百万
    x/y z x/y z
    网格1 1/62.5D 1/300D 0.6D 1D 3.7
    网格2 1/125.0D 1/600D 0.6D 1D 7.2
    网格3 1/250.0D 1/1200D 0.6D 1D 13.6
    下载: 导出CSV

    表  3  参考方柱LES结果及验证

    Table  3.   LES results of square column and verification

    方法 文献 Re/104 AR ${\overline C}_{\mathrm{d}} $ ${C}_{{\mathrm{d}}1} $ ${C}_{{\mathrm{l}}1} $ St
    LES 网格 1 5.5 4 1.220 0.09 0.33 0.1
    网格 2 1.147 0.10 0.30 0.096
    网格 3 1.156 0.11 0.31 0.094
    文献 [22] 5.5 4 1.20 / 0.41 0.1
    文献 [23] 5 4 1.28 0.13 0.32 0.085
    试验 文献 [24] 6 4 1.27 0.08 0.296 0.097
    文献 [25] 7.3 3 1.29 0.102
    文献 [11] 5.5 5 0.93 0.35 0.10
    文献 [10] 5.5 5 1.08
    下载: 导出CSV

    表  4  参考方柱和模型1~3的风荷载系数

    Table  4.   Wind load coefficients for square column and models 1–3

    名称 ${\overline C}_{\mathrm{d}} $ ${ C}_{{\mathrm{d}}1} $ ${ C}_{{\mathrm{l}}1} $
    方柱 1.147 0.100 0.300
    模型 1 0.146 0.102 0.232
    模型 2 0.149 0.102 0.219
    模型 3 0.145 0.101 0.218
    下载: 导出CSV

    表  5  模型2、4、5的风荷载

    Table  5.   Wind loads of models 2, 4, 5

    名称 ${\overline C}_{\mathrm{d}} $ ${C}_{{\mathrm{d}}1} $ ${C}_{{\mathrm{l}}1} $
    模型 2 1.149 0.102 0.219
    模型 4 1.156 0.106 0.229
    模型 5 1.153 0.103 0.261
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-11-02
  • 修回日期:  2024-01-07
  • 网络出版日期:  2024-10-31

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