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Performance-based assessment of an innovative braced tube system for tall buildings

Mohammadi, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1007/s10518-017-0219-2
  3. Abstract:
  4. In this paper, an innovative seismic lateral force resisting system for tall buildings is introduced. In this system, a novel supplemental part, ribbed bracing system (RBSyst), is attached to Braced Tube System, creating a modified BTS. RBSyst is a supplemental part which is attached to the conventional bracing members to eliminate buckling problem. The behavior of RBSyst under tensile force is similar to that of the conventional braces. However, in compression, it prevents the braces from buckling by length reduction. In order to evaluate the efficiency of this new BTS system by performance-based assessment, two typical 40-story tall buildings with different story modules equipped with this proposed bracing system are modeled numerically. Then, the seismic behavior of these 3-dimensional models are evaluated by nonlinear time history analysis under maximum considered earthquakes and service-level earthquakes. The results of the analysis demonstrate that the performance of the tall buildings equipped with this new BTS system is within the acceptable limits under both service-level and maximum considered earthquake ground motions. Additionally, it is shown that RBSyst part can effectively enhance the seismic behavior of BTS systems. © 2017 Springer Science+Business Media B.V
  5. Keywords:
  6. Braced tube system ; Ribbed bracing system ; Tall building ; Buckling ; Buildings ; Geophysics ; Seismic response ; Seismology ; Tall buildings ; Bracing systems ; Buckling problems ; Lateral force resisting system ; Maximum considered earthquakes ; Nonlinear time history analysis ; Performance-based assessment ; Seismic performance ; Tube systems ; Earthquakes
  7. Source: Bulletin of Earthquake Engineering ; 2017 , Pages 1-22 ; 1570761X (ISSN)
  8. URL: https://link.springer.com/article/10.1007/s10518-017-0219-2