Experimental investigation of wind impact on low-rise elevated residences

低层 计算流体力学 风力工程 屋顶 湍流 空气动力学 气流 环境科学 电流(流体) 流线、条纹线和路径线 压力系数 海洋工程 气象学 风洞 结构工程 工程类 航空航天工程 机械工程 地理 电气工程
作者
Nourhan Abdelfatah,Amal Elawady,Peter Irwin,Arindam Gan Chowdhury
出处
期刊:Engineering Structures [Elsevier]
卷期号:257: 114096-114096 被引量:2
标识
DOI:10.1016/j.engstruct.2022.114096
摘要

• Presenting 8 different cases of large-scaled elevated models tested in WOW. • Partial turbulence simulation was used to calculate the peak pressure coefficient. • CFD numerical simulation was used to present the flow streamlines. • New zoning criterion proposed for the floor surface. • Recommendations provided to calculate external pressures on components and cladding. The vulnerability of low-rise residential buildings to extreme wind events, such as hurricanes, is an escalating concern due to the frequent failures and losses. Elevated low-rise structures are constructed to reduce the hydrodynamic load from surges and flooding during hurricanes. However, due to the current lack of information, wind loading on elevated coastal structures is not adequately addressed in current international guidelines. To address this knowledge gap, large-scale experimental studies were conducted to precisely determine wind effects on elevated houses with different numbers of stories and varying stilt heights. In this study, comparisons are presented on various tested configurations to show the effect of elevating residential houses on the resulting wind loads. In particular, this work investigates the peak pressure coefficients and wind forces on the building roof, walls, and floor underside. The experimental program was supplemented by numerical simulations using Computational Fluid Dynamics (CFD) to assess the airflow around the model and the role of the air gap underneath the floor on altering the aerodynamics. Local peak pressure patterns and wind loads for structural design were analyzed with a view to the development of building code provisions. The recommended external pressure coefficients for the exterior floor surface are compared to those for a flat roof surface of a low-rise building.
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