Steel and Composite Structures

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The beneficial effects of beam web opening in seismic behavior of steel moment frames

  • Erfani, Saeed (Civil Engineering Department, Amirkabir University of Technology) ;
  • Naseri, Ata Babazadeh (Civil Engineering Department, Amirkabir University of Technology) ;
  • Akrami, Vahid (Civil Engineering Department, Amirkabir University of Technology)
  • Received : 2011.12.03
  • Accepted : 2012.04.16
  • Published : 2012.07.25
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Abstract

Implementation of openings in beams web has been introduced as an innovative method for improving seismic performance of steel moment frames. In this paper, several steel moment frames have been studied in order to evaluate the effect of openings in beams web. The beam sections with web opening have been modeled as a simplified super-element to be used in designing frames and to determine opening configurations. Finite element models of designed frames were generated and nonlinear static pushover analysis was conducted. The efficient location for openings along the beam length was discovered and the effects of beams with web openings on local and global behavioral characteristics of frames were discussed. Base on the results, seismic performance of steel moment frames was improved by creating openings in beams web, in terms of reduction in stress level of frame sensitive areas such as beam to column connections and panel zones.

Keywords

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