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Optimum topological bracing design of tall steel frames subjected to dynamic loading
Computers & Structures ( IF 4.7 ) Pub Date : 2021-11-08 , DOI: 10.1016/j.compstruc.2021.106705
Stefanos Sotiropoulos 1 , Nikos D. Lagaros 1
Affiliation  

In this paper, a frame structural topology optimization methodology for the generation of moment resisting braced frames for tall buildings, considering dynamic seismic loading, is presented. Real-world loading conditions along with standardized steel profiles of Euronorm are employed. In the literature, the studies that employ the ground structure topology optimization method are limited mostly to truss structures under static loading conditions. The dynamic response in the framework of structural topology optimization remains a challenging problem, especially when the ground structure method is used for deriving the structural system of tall buildings. The contribution of this study to the state of the art, relies on the implementation of the proposed methodology in the conceptual design phase of civil engineering frame structures, where both axial and flexural stiffness is considered. Direct time integration methods are used, to implement forced vibrations and real recorded earthquake data in the topology optimization procedure, resulting to novel layouts for lateral resisting systems of tall buildings. Aiming to aid the engineer to the final design phase, the response spectrum modal analysis is employed and the seismic loading is applied according to the Eurocode 8.



中文翻译:

动荷载作用下高大钢框架的优化拓扑支撑设计

在本文中,提出了一种考虑动态地震荷载的高层建筑抗弯支撑框架的框架结构拓扑优化方法。采用真实世界的载荷条件以及 Euronorm 的标准化钢型材。在文献中,采用地面结构拓扑优化方法的研究主要限于静载条件下的桁架结构。结构拓扑优化框架下的动力响应仍然是一个具有挑战性的问题,特别是当使用地面结构方法来推导高层建筑的结构体系时。这项研究对现有技术的贡献取决于在土木工程框架结构的概念设计阶段所提出的方法的实施,其中考虑了轴向刚度和弯曲刚度。使用直接时间积分方法,在拓扑优化过程中实现受迫振动和真实记录的地震数据,从而为高层建筑的横向抗力系统提供新颖的布局。为了帮助工程师进入最终设计阶段,采用响应谱模态分析并根据欧洲规范 8 施加地震载荷。

更新日期:2021-11-09
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