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Earthquakes and Structures
  Volume 14, Number 5, May 2018 , pages 449-458
DOI: https://doi.org/10.12989/eas.2018.14.5.449
 


Seismic performance of retrofitted URM walls with diagonal and vertical steel strips
Abbas Darbhanzi, Mohammad S. Marefat, Mohammad Khanmohammadi, Amin Moradimanesh and Hamid Zare

 
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.
 
Key Words
    seismic retrofit; clay brick; URM walls; vertical and diagonal steel strips; lateral strength and ductility
 
Address
Abbas Darbhanzi: College of Engineering, Vali-e-Asr University of Rafsanjan, Iran
Mohammad S. Marefat, Mohammad Khanmohammadi, Amin Moradimanesh and Hamid Zare: School of Civil Engineering, College of Engineering, University of Tehran, Iran
 

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