Experimental investigation of the seismic behavior of damaged unreinforced masonry walls retrofitted with concrete ties

Document Type : Original Article

Authors

1 , Civil Engineering Department, Taft Branch, Islamic Azad University, Taft Yazd, Iran

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

3 Civil Engineering Department, Yazd Branch, Islamic Azad University, Yazd, Iran

Abstract

This paper aims to investigate the effects of retrofitting damaged unreinforced masonry walls using vertical concrete ties and bed rebar under both vertical and in-plane cyclic loading. An experimental program was conducted to test the masonry wall under a combination of constant vertical loads and cyclic lateral loads, following a specific loading protocol. The masonry wall was constructed to closely resemble the brick wall system commonly used in Iran and other South Asian countries by local construction workers. Initially, the unreinforced masonry wall was tested as a reference under vertical and in-plane cyclic lateral loads. Subsequently, the damaged sample was retrofitted by adding vertical concrete ties and bed rebar on one side, after which it was retested under the same loading conditions. The results showed that retrofitting the unreinforced masonry walls with vertical concrete ties and bed rebar not only restored the primary seismic characteristics of the walls but also significantly improved their seismic behavior.

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Asas Journal
Volume 24, Issue 69
winter 2023
March 2023

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History

  • Receive Date: 06 February 2023
  • Revise Date: 08 August 2023
  • Accept Date: 25 November 2023

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