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首页> 外文期刊>Journal of Fluids and Structures >An experimental study on wind loads acting on a high-rise building model induced by microburst-like winds
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An experimental study on wind loads acting on a high-rise building model induced by microburst-like winds

机译：类风爆发引起的高层建筑模型风荷载的实验研究

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In the present study, an experimental investigation is conducted to quantify the char-acteristics of the microburst-induced wind loads (i.e., both static and dynamic wind loads) acting on a high-rise building model, compared to those with the test model placed in conventional atmospheric boundary layer (ABL) winds. The experimental study is performed by using an impinging-jet-based microburst simulator available at Iowa State University. In additional to conducting flow field measurements to quantify the flow characteristics of the microburst-like wind, both mean and dynamic wind loads acting on the test model induced by the microburst-like wind are assessed in detail based on the quantitative measurements of the surface pressure distributions around the test model and the resultant aerodynamic forces. It is found that the microburst-induced wind loads acting on high-rise buildings would be significantly different from their counterparts in conventional ABL winds. Both the static and dynamic wind loads acting on the high-rise building model were found to change significantly depending on the radial locations and the orientation angles of the test model in respect to the oncoming microburst-like wind. The dynamic wind loads acting on the test model were found to be mainly influenced by the periodical shedding of the primary vortices and the high turbulence levels in the microburst-like wind. The findings derived from the present study are believed to be useful to gain further insight into the underlying physics of the flow-structure interactions of high-rise buildings in violent microburst winds for a better understanding of the damage potential of microburst winds to high-rise buildings.
机译：在本研究中，进行了一项实验研究，以量化与放置测试模型的高层建筑模型相比，微爆裂引起的风荷载（即静态风荷载和动态风荷载）的特征。在常规大气边界层（ABL）中风。实验研究是通过使用爱荷华州立大学的基于冲击射流的微爆模拟器进行的。除了进行流场测量以量化类微爆风的流动特性外，还基于表面压力的定量测量来详细评估作用在由类微爆​​风引起的测试模型上的平均和动态风荷载测试模型周围的分布以及由此产生的空气动力。结果发现，作用在高层建筑上的微爆引起的风荷载将与常规ABL风中的风荷载产生显着不同。研究发现，作用在高层建筑模型上的静态和动态风荷载都随测试模型相对于迎面而来的微爆状风的径向位置和方向角而发生显着变化。发现作用在测试模型上的动态风荷载主要受初级涡旋的周期性脱落和微爆发状风中的高湍流水平影响。相信本研究得出的发现有助于深入了解高层建筑在强烈微暴风中的流固相互作用的基本物理原理，以便更好地了解微暴风对高层建筑的潜在破坏力建筑物。

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