Development and application of a simplified model for the design of a super-tall mega-braced frame-core tube building

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This article discusses the development and application of a simplified nonlinear model to compare two design schemes of a super-tall mega-braced frame-core tube building.

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19 p.

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Lu, Xinzheng; Xie, Linlin; Yu, Cheng & Lu, Xiao December 24, 2015.

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This article is part of the collection entitled: UNT Scholarly Works and was provided by UNT College of Engineering to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 39 times , with 4 in the last month . More information about this article can be viewed below.

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This article discusses the development and application of a simplified nonlinear model to compare two design schemes of a super-tall mega-braced frame-core tube building.

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19 p.

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Abstract: Resilience-based earthquake design for next-generation super-tall buildings has become an important trend in earthquake engineering. Due to the complex structural system in super-tall buildings and the extreme computational workload produced when using refined finite element (FE) models to design such buildings, it is rather difficult to efficiently perform a comparison of different design schemes of super-tall buildings and to investigate the advantages and disadvantages of different designs. Here, a simplified nonlinear model is developed and applied to compare two design schemes (i.e., the fully braced scheme and half-braced scheme) of a super-tall mega-braced frame-core tube building, which is an actual engineering project with a total height of approximately 540 m. The accuracy of the simplified model is validated through a comparison of the results of modal analyses, static analyses and dynamic time history analyses using the refined FE models. Subsequently, the plastic energy dissipation of different components and the distribution of the total plastic energy dissipation over the height of the two design schemes are compared using the proposed simplified model. The analyses indicate that the fully braced scheme is superior because of its more uniform energy distribution along the building height and the large amount of energy dissipated in the replaceable coupling beams, which enables rapid repair and re-occupancy after an earthquake. In contrast, the potential damage in the half-braced scheme is more concentrated and more severe, and the damage in the core tubes is difficult to repair after an earthquake.

This is the accepted manuscript version of the article. Reprinted with permission from Elsevier Science Ltd., all rights reserved. The final definitive version is available here: http://dx.doi.org/10.1016/j.engstruct.2015.11.039

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  • Engineering Structures, 2016. Amsterdam, The Netherlands: Elsevier

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  • Publication Title: Engineering Structures
  • Volume: 110
  • Pages: 116-126
  • Peer Reviewed: Yes

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UNT Scholarly Works

Materials from the UNT community's research, creative, and scholarly activities and UNT's Open Access Repository. Access to some items in this collection may be restricted.

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  • December 16, 2014

Accepted Date

  • November 19, 2015

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  • December 24, 2015

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  • Feb. 1, 2018, 6:37 p.m.

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Lu, Xinzheng; Xie, Linlin; Yu, Cheng & Lu, Xiao. Development and application of a simplified model for the design of a super-tall mega-braced frame-core tube building, article, December 24, 2015; Amsterdam, The Netherlands. (digital.library.unt.edu/ark:/67531/metadc1065410/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Engineering.