A tubed mega frame structure is composed of tubes located at the perimeter of the structure as mega columns and mega beams. This paper explores the applicability of this structural system to supertall buildings in high seismic intensity areas. First, a refined finite element (FE) model of a 585‐m tall tubed mega frame structure was built in ABAQUS, as well as a mega‐braced frame‐core structure on which the tubed mega frame structure is based. In order to improve the efficiency of nonlinear analyses, beam‐based simplified FE models of the two structures were developed in OpenSees and validated against the refined FE models. Then, incremental dynamic analyses of the tubed mega frame structure were conducted based on its simplified model. The damage of the tubes was quantified by a modified Park–Ang damage model. The analyses indicate that the seismic damage of the tubes in the tubed mega frame structure develops rapidly after yielding, because tubes at the perimeter of the structure suffer severe axial load under high‐intensity earthquakes. It is suggested that the axial load ratio of the tubed mega columns should be controlled to avoid brittle failure in the seismic design of supertall tubed mega frame structures.

中文翻译：

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基于简化有限元模型的超高层管状巨型框架结构的震害评估

管状的巨型框架结构由位于结构周边的管道组成，例如巨型柱和巨型梁。本文探讨了该结构系统在高地震烈度地区的超高层建筑中的适用性。首先，在ABAQUS中建立了一个585米高的管状巨型框架结构的精制有限元（FE）模型，并在此基础上建立了管状巨型框架的巨型支撑框架核心结构。为了提高非线性分析的效率，在OpenSees中开发了这两种结构的基于梁的简化有限元模型，并针对改进后的有限元模型进行了验证。然后，基于其简化模型对管状大型框架结构进行了增量动力分析。管子的损坏通过改进的帕克-昂（Park-Ang）损坏模型进行量化。分析表明，在大型屈服后，管形巨型框架结构中的管的地震破坏迅速发展，因为在高强度地震下，结构周边的管承受着严重的轴向载荷。建议在超高层管状巨型框架结构的抗震设计中，应控制管状巨型柱的轴向载荷比，以避免脆性破坏。