俞怡恬, 黄生洪, 王新. 龙卷风冲击高层建筑气动力效应数值模拟[J]. 工程力学, 2020, 37(1): 168-174. DOI: 10.6052/j.issn.1000-4750.2019.02.0069
引用本文: 俞怡恬, 黄生洪, 王新. 龙卷风冲击高层建筑气动力效应数值模拟[J]. 工程力学, 2020, 37(1): 168-174. DOI: 10.6052/j.issn.1000-4750.2019.02.0069
YU Yi-tian, HUANG Sheng-hong, WANG Xin. NUMERICAL SIMULATION ON AERO-DYNAMICAL EFFECTS OF HIGH-RISE BUILDINGS IMPACTED BY TORNADOES[J]. Engineering Mechanics, 2020, 37(1): 168-174. DOI: 10.6052/j.issn.1000-4750.2019.02.0069
Citation: YU Yi-tian, HUANG Sheng-hong, WANG Xin. NUMERICAL SIMULATION ON AERO-DYNAMICAL EFFECTS OF HIGH-RISE BUILDINGS IMPACTED BY TORNADOES[J]. Engineering Mechanics, 2020, 37(1): 168-174. DOI: 10.6052/j.issn.1000-4750.2019.02.0069

龙卷风冲击高层建筑气动力效应数值模拟

NUMERICAL SIMULATION ON AERO-DYNAMICAL EFFECTS OF HIGH-RISE BUILDINGS IMPACTED BY TORNADOES

  • 摘要: 龙卷风是一种大型气旋流动,具有很强的破坏力,是抗风减灾工程中重点防范对象之一。现有龙卷风研究多集中于低矮建筑或输电线塔等结构,对作用于城市高层建筑结构的龙卷风流动特征及气动力响应还认识不清。该文采用大涡模拟开展了龙卷风数值风场模拟,与文献提供的龙卷风风洞实验结果进行了校核,获得了实验室尺度下龙卷风冲击高层建筑的风荷载特征和规律。进一步针对全尺寸条件下F2级龙卷风冲击不同尺度和形状的高层建筑流场开展模拟,分析其流场特点和气动载荷响应特征,揭示了龙卷风冲击不同尺度和形状的高层建筑流场差异和气动荷载产生机理。

     

    Abstract: A tornado is a large scale swirling flow and is of extreme destructive power. It is one of the most critical targets of wind resistance and disaster reduction projects. Previous studies mostly focused on tornadoes attacking low-rise buildings and steel transmission towers, etc., and paid little attention to the flow characteristics and aero-dynamical responses of high-rise buildings in urban environment when attacked by tornadoes. This study conducted large-eddy simulations on tornado wind field and its interaction with building models in scales of laboratory simulator. The results were validated with experimental values, obtaining some wind load characteristics and flow mechanisms in laboratory scales. Subsequently, full-scale high-rise buildings with typical cross-section shapes attacked by a full-scale F2 tornado were simulated based on the validated methods and models. The flow field characteristics and aerodynamic load response characteristics in full-scale cases were evaluated. The flow field differences and aerodynamic load generation mechanism for full-scale tornado impacting different scales and shapes of high-rise buildings were obtained.

     

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