Improved Simulation and Analysis of Extreme Wind Loads on Low-Rise Structures

9317876 9412905 Reinhold Tieleman该项目将开发用于模拟和分析低层结构极端风荷载的改进方法，并将检查这些结构在受到随机高度和风场的逆风粗糙度时的安全系数。 这项工作包括以下任务：发展紊流模拟和紊流增强技术，评估对最大吸力的影响;同时测量入射速度波动和表面压力;利用特征向量技术和条件抽样分析数据;制定模拟风荷载包括极端吸力的标准;测量入射速度;不同建筑物形状和流动的涡流速度和表面压力;进行类似的测试，包括粗糙度的突然变化;并测试一组建筑物，包括周围粗糙度和建筑物的随机变化。 这项工作的结果将有助于发展的方法，以减轻强烈的表面压力波动的影响，由于流动分离和涡流的产生，在低凸起的建筑物沿着屋顶墙交叉。 ***

9317876 9412905 Reinhold Tieleman The project will develop improved methods for the simulation and analysis of extreme wind loads on low-rise structures and will examine the safety factors for these structures when subject to upwind roughness fields of random height and fetch. The work includes the following tasks: develop turbulence simulation and turbulence augmentation techniques with assessment of the effects on peak suctions; simultaneous measurements of incident velocity fluctuations and surface pressures; analysis of data using eigenvector techniques and conditional sampling; develop criteria for modeling wind loads including extreme suctions; measure incident velocities; velocities of vortices and surface pressures for various building shapes and flows; conduct similar tests including abrupt changes in roughness; and test a group of buildings including random variations of surrounding roughness and buildings. The results from this work will help in the development of methods for mitigating the effect of intense surface pressures fluctuations due to flow separation and vortex generation in low-raise buildings along roof-wall intersections. ***