Steel and Composite Structures

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Effect of semi-rigid connections in improvement of seismic performance of steel moment-resisting frames

  • Feizi, M. Gholipour (Department of Civil Engineering, University of Tabriz) ;
  • Mojtahedi, A. (Department of Civil Engineering, University of Tabriz) ;
  • Nourani, V. (Department of Civil Engineering, University of Tabriz)
  • Received : 2012.12.31
  • Accepted : 2015.03.14
  • Published : 2015.08.25
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Abstract

Seismic performances of dual steel moment-resisting frames with mixed use of rigid and semi-rigid connections were investigated to control of the base shear, story drifts and the ductility demand of the elements. To this end, nonlinear seismic responses of three groups of frames with three, eight and fifteen story were evaluated. These frames with rigid, semi-rigid and combined configuration of rigid and semi-rigid connections were analyzed under five earthquake records and their responses were compared in ultimate limit state of rigid frame. This study showed that in all frames, it could be found a state of semi-rigidity and connections configuration which behaved better than rigid frame, with consideration of the base shear and story drifts criterion. Finally, some criteria were suggested to locate the best place of the semi-rigid connections for improvement of the seismic performance of steel moment-resisting frames.

Keywords

References

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