Performance-Based Seismic Evaluation of Ping An International Finance Center

Poon, Dennis C. K.; Hsiao, Ling-En; Zhu, Yi; Pacitto, Steven; Zuo, Steve; Gottlebe, Torsten; Srikonda, Rohit

doi:10.1061/41171(401)87

Cited by 1 publication

(2 citation statements)

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“…Currently, the core tube structure is the main lateral resisting system of tall buildings. Nonlinear time‐history analyses of various core tube structures [ 6,7 ] have been conducted to evaluate their seismic performance under certain seismic intensities, although progressive collapse simulations [ 8,9 ] were performed to predict their potential collapse modes. Cases of the tubed mega frame structure are limited.…”

Section: Introductionmentioning

confidence: 99%

“…Interstory drift ratio (IDR) is still one of the most frequently used damage indexes for tall buildings, which has been employed for seismic damage assessment of various tall buildings. [ 6,7 ] The IDR of the upper story is composed of its shear and flexural deformation and the rigid body motion caused by lower story rotation. Because the rigid body motion does not contribute to structural damage, Ji et al [ 18 ] presented interstory pure translation ratio for the seismic fragility assessment of a dual core wall system.…”

Section: Introductionmentioning

confidence: 99%

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Seismic damage assessment of a supertall tubed mega frame structure based on a simplified finite element model

Zhao

Jia

Wei

et al. 2021

Structural Design Tall Build

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Summary 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.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%