SummaryThe use of curved forms in tall buildings has increased recently due to their structural and esthetic advantages. Diagrid structures are typically used for these buildings because of their ability to express curved forms. There are, however, few studies about the curvature of tall buildings. This paper examines the effect of curvature on the wind force on tall curved buildings with diagrid system. So, to achieve this, the form of tall curved buildings is investigated, and the commonly used equations that constitute their form are determined. Then, applying computational fluid dynamics simulation, wind force was calculated on the developed alternatives which were created by the equations. Besides, the structural mass of each model is calculated by optimizing the cross‐section of the members. It is concluded that considering the conditions of the applied model, by increasing the concavity of the form, the suction on the building's facade increases. Further, with the increase of the concavity in the plan and elevation, the along wind force on the structure and overturning moment increases. Also, it is observed that the structural efficiency of curvilinear buildings is only appropriate to a certain extent of curvature, and with its increase, the structural efficiency decreases. This article offers useful information for the preliminary design of tall buildings.

中文翻译：

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研究考虑风荷载的形式曲率对斜肋网格高层建筑的影响

摘要由于其结构和美学优势，近年来高层建筑中弧形结构的使用有所增加。斜肋网格结构通常用于这些建筑物，因为它们能够表达弯曲的形式。然而，关于高层建筑曲率的研究很少。本文研究了曲率对斜肋构架系统的高层弯曲建筑风力的影响。因此，为了实现这一目标，我们对高层弯曲建筑的形式进行了研究，并确定了构成其形式的常用方程。然后，应用计算流体动力学模拟，根据方程创建的替代方案计算风力。此外，每个模型的结构质量都是通过优化构件的横截面来计算的。结论是，考虑到应用模型的条件，通过增加形式的凹度，建筑物立面的吸力会增加。另外，随着平面和立面凹度的增大，结构所受的顺风力和倾覆力矩也随之增大。此外，还观察到曲线建筑的结构效率仅适合于一定程度的曲率，并且随着曲率的增加，结构效率降低。本文为高层建筑的初步设计提供了有用的信息。