【摘要】 双L形断面高层建筑是一种新颖的建筑形式，此类建筑的立面较多、风荷载相对复杂，相关研究尚不多见。本文通过风洞试验与数值模拟，对双L形高层建筑的风荷载进行研究，分析了风向角、L夹角、长宽比、间厚比等因素对体型系数和风力系数的影响规律，并对各种参数条件下的体型系数和风力系数进行了定量分析总结。结果表明：在全风向角下，双L形高层建筑所有外立面的体型系数均在正交风向角达到最大，所有内侧立面的体型系数均为负值，体型系数最大绝对值显著大于常规断面高层建筑；双L形断面的间厚比和夹角对风力系数的影响较小，而长宽比对风力系数的影响较大，在特定长宽比下，双L形高层建筑的横风向和扭转向风力系数远大于常规断面高层建筑。本文所得结果可为类似高层建筑的抗风设计提供参考。更多还原

【Abstract】 Double-L-shaped high-rise building is a new form of high-rise building, this type of building has many facades and relatively complex wind loads, however, the related research is very scarce. Therefore, a series of numerical simulations and wind tunnel tests were conducted to systematically investigate the shape coefficient and wind force coefficient of double L-shaped high-rise buildings, and the influences of wind direction, L-angle, aspect ratio, and thickness ratio on wind loads were analyzed in this work. Meanwhile, the shape coefficient and wind coefficient under various parameters were quantitatively analyzed and summarized. The results shows that the shape coefficients of outer surfaces reach maximum at orthogonal wind direction, and the shape coefficients of all inner surfaces are negative, the maximum absolute value of the shape coefficient is significantly greater than that of conventional high-rise buildings. The thickness ratio and L-angle of the double L-shaped section have a slight influence on the wind force coefficient, while the aspect ratio has a significant influence. The cross-wind and torsional wind force coefficients of double L-shaped high-rise buildings are much greater than those of conventional high-rise buildings at specific aspect ratios. The relevant results can provide reference for the wind-resistant design of similar high-rise buildings.更多还原