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Integrated optimal wind‐resistant design of super‐tall structures with toggle‐brace damper systems
The Structural Design of Tall and Special Buildings ( IF 1.8 ) Pub Date : 2020-08-08 , DOI: 10.1002/tal.1799
Xin Zhao 1 , Junchen Guo 1 , Haojia Ma 2 , Kun Ding 3
Affiliation  

With the increasing heights of super‐tall buildings, the natural frequency of these structures approaches the predominant frequency of winds, causing the structures to be more sensitive to wind load. For the safety and economy of these structures, the formulation of a reasonable wind‐resistant design is crucial. In this paper, an optimal design of toggle‐brace damper systems for super‐tall buildings using a damping ratio limit method is presented to obtain the optimal placement, number, and damping coefficient of toggle‐brace dampers under different constraints. The constraints include the additional damping ratio under a 50‐year return period wind, the maximum power of the damper under a 50‐year return period wind, and the maximum output force of a moderate earthquake. The toggle‐brace damper systems improve the structural performance. Hence, the structural components produce design redundancy, which can be optimized using the sequential quadratic programming (SQP) algorithm and a multi‐grade constrained optimal design method to further improve the economic benefits of the structure. Based on the combination of the optimal design method of toggle‐brace damper systems, SQP algorithm, and multi‐grade constrained optimal design method, an integrated optimal wind‐resistant design for toggle‐brace damper systems is proposed. To demonstrate the effectiveness and applicability of this design, a 245‐m super‐tall building is employed as an engineering case.

中文翻译:

超高结构与肘杆支撑风门系统的集成优化抗风设计

随着超高层建筑高度的增加,这些结构的固有频率接近风的主要频率,从而使结构对风荷载更加敏感。为了这些结构的安全性和经济性,制定合理的防风设计至关重要。本文提出了一种采用阻尼比极限法的超高层建筑肘杆式减振器系统的优化设计,以在不同约束条件下获得肘杆式减振器的最优布置,数量和阻尼系数。约束条件包括在50年回归期风中的附加阻尼比,在50年回归期风中的阻尼器的最大功率以及中等地震的最大输出力。肘杆减震器系统改善了结构性能。因此,结构构件产生设计冗余,可以使用顺序二次规划(SQP)算法和多级约束最优设计方法对其进行优化,以进一步提高结构的经济效益。结合肘杆阻尼器系统的最优设计方法,SQP算法和多级约束最优设计方法,提出了肘杆阻尼器系统的综合最优抗风设计。为了证明该设计的有效性和适用性,采用了245 m的超高层建筑作为工程案例。结合肘杆阻尼器系统的最优设计方法,SQP算法和多级约束最优设计方法,提出了肘杆阻尼器系统的综合最优抗风设计。为了证明该设计的有效性和适用性,采用了245 m的超高层建筑作为工程案例。结合肘杆阻尼器系统的最优设计方法,SQP算法和多级约束最优设计方法,提出了肘杆阻尼器系统的综合最优抗风设计。为了证明该设计的有效性和适用性,采用了245 m的超高层建筑作为工程案例。
更新日期:2020-10-15
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