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On the plastic analysis of concentrically braced frames with shear panel, obtaining predetermined collapse mechanism

Akbari Hamed, A ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1002/tal.1170
  3. Abstract:
  4. Summary Conventional design methods do not ensure that the desired collapse mechanism is developed at target displacement. In this paper, a case study is presented to analyze concentrically braced frames with steel shear panel (CBFSP). Also, extensive investigation in the failure modes are made, to have the global yielding mode at the final state. For this purpose, each of one-story, three-story, six-story and nine-story CBFSP models were decomposed into three parts where the members' closed-form equations of internal forces were identified and superimposed. On the basis of the kinematic theorem of plastic collapse, the possible mechanisms and the related energy equations were defined to estimate the lateral load multiplier. First, the shear panels, columns, vertical and horizontal boundary elements were designed using the values of internal forces and seismic loads. Next, sections of the beams and braces were selected by constraining, where the mechanism equilibrium curve of the desired mechanism had to be placed below the others within the admissible roof displacement. Finally, for assessment of the precision of the method, results of the pushover analysis of the finite element models were compared with the theoretical ones. The findings show that, despite more effort for design, the investigated method is reliable and satisfactory
  5. Keywords:
  6. Concentrically braced frame ; Plastic design ; Steel shear panel ; Tension field action mode ; Design ; Structural frames ; Surface tension ; Collapse mechanism ; Concentrically braced frames ; Plastic designs ; Shear panels ; Shear yielding mode ; Tension field action ; Finite element method
  7. Source: Structural Design of Tall and Special Buildings ; Volume 24, Issue 5 , 2015 , Pages 366-395 ; 15417794 (ISSN)
  8. URL: http://onlinelibrary.wiley.com/doi/10.1002/tal.1170/abstract