To investigate wind-induced torsional loads on rectangular tall buildings, five rigid scale models were tested in an atmospheric boundary layer wind tunnel. Each model was built with identical plan dimensions but different aspect ratios. Two terrain categories were experimentally simulated in the wind tunnel to evaluate each model under different wind directions. From synchronized wind pressure measurements, the values for the shear wind force, bending moment, and torsion moment at the base of each model were calculated. The results were normalized in terms of mean shear, bending, and torque coefficients. Variations of the coefficients obtained with respect to the aspect ratio of the models tested were analyzed. Based on the experimental results, a new parametric equation to estimate the torque coefficients at the base of rectangular tall buildings as a function of aspect ratio and wind direction was proposed. The base torque coefficients obtained with the proposed equation are in good agreement with the experimental results.

中文翻译：

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矩形高层建筑风致剪、弯、扭荷载试验研究

为了研究矩形高层建筑上的风致扭转载荷，在大气边界层风洞中测试了五个刚性比例模型。每个模型都具有相同的平面尺寸，但具有不同的纵横比。在风洞中实验模拟了两种地形类别，以评估不同风向下的每个模型。通过同步风压测量，计算了每个模型底部的剪切风力、弯矩和扭矩值。结果根据平均剪切、弯曲和扭矩系数进行了标准化。分析了相对于测试模型的纵横比获得的系数的变化。根据实验结果，提出了一种新的参数方程，用于估计矩形高层建筑底部的扭矩系数作为纵横比和风向的函数。用所提出的方程获得的基础扭矩系数与实验结果非常吻合。