Earthquakes and Structures

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Seismic performance of retrofitted URM walls with diagonal and vertical steel strips

  • Darbhanzi, Abbas (College of Engineering, Vali-e-Asr University of Rafsanjan) ;
  • Marefat, Mohammad S. (School of Civil Engineering, College of Engineering, University of Tehran) ;
  • Khanmohammadi, Mohammad (School of Civil Engineering, College of Engineering, University of Tehran) ;
  • Moradimanesh, Amin (School of Civil Engineering, College of Engineering, University of Tehran) ;
  • Zare, Hamid (School of Civil Engineering, College of Engineering, University of Tehran)
  • Received : 2017.05.20
  • Accepted : 2018.03.19
  • Published : 2018.05.25
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Abstract

Earthquakes have shown the vulnerability of unreinforced masonry (URM) structures. The aim of this research is to study a technique for in-plane seismic retrofitting of URM walls in which both diagonal and vertical steel strips are added to a single side of a URM wall. Specimens have been tested under quasi-static cyclic lateral load in combination with constant vertical load. The tests show that vertical and diagonal strips cause a significant increase in seismic capacity in terms of both strength (about 200%) and displacement at maximum (about 20%). Furthermore, this technique caused the failure modes of URM walls were influenced.

Keywords

References

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