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Experimental study on seismic behavior of damaged unreinforced masonry walls retrofitted by vertical concrete ties and bed rebar with and without shotcrete

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Abstract

The present article describes experimental procedures to investigate the seismic retrofitting techniques used for damaged unreinforced masonry (URM) walls. In total, three tests were performed on a full-scale wall under constant vertical load, along with lateral loading according to the loading protocol. The unreinforced wall was tested as a reference sample. Then, the damaged sample was retrofitted with two vertical concrete ties and bed rebar on one side and retested. Finally, the damaged sample was strengthened with shotcrete on two sides and tested. The experimental results showed that strengthening the damaged unreinforced wall with the vertical concrete ties and bed rebar not only restored most of the original seismic characteristics of the wall but also significantly improved the seismic behavior of the wall. Moreover, improving seismic characteristics, the retrofitting by vertical concrete ties, bed rebar, and two-side shotcrete increased wall energy absorption capacity.

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Acknowledgements

The authors express great gratitude to the Structural and Earthquake Research Center of Islamic Azad University- Taft Branch for providing access to its experimental facilities.

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The authors did not receive support from any organization for the submitted work.

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Authors and Affiliations

  1. Department of Civil Engineering, Taft Branch, Islamic Azad University, Taft, Iran

    Batool Rismanian Yazdi & Mohammad Reza Javaheri Tafti

  2. Department of Civil Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran

    Alireza Mirjalili

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  1. Batool Rismanian Yazdi
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  2. Mohammad Reza Javaheri Tafti
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  3. Alireza Mirjalili
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Contributions

MRJ, BR, and AM wrote the main manuscript text, and BR prepared figures and tables. All authors reviewed the manuscript.

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Correspondence to Mohammad Reza Javaheri Tafti.

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Rismanian Yazdi, B., Javaheri Tafti, M.R. & Mirjalili, A. Experimental study on seismic behavior of damaged unreinforced masonry walls retrofitted by vertical concrete ties and bed rebar with and without shotcrete. J Build Rehabil 8, 87 (2023). https://doi.org/10.1007/s41024-023-00331-0

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  • DOI: https://doi.org/10.1007/s41024-023-00331-0

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