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