URM walls strengthened with fabric-reinforced cementitious matrix composite subjected to diagonal compression

Saman Babaeidarabad, Francisco De Caso, Antonio Nanni

Research output: Contribution to journalArticlepeer-review

104 Scopus citations


Unreinforced masonry (URM) walls have been constructed for the past millennia and are still widely used today. URM walls have proven to have low shear strength and are prone to brittle failure when subjected to in-plane loads caused by earthquake or wind. Retrofitting URM walls is accomplished internally and externally using current techniques, such as placing steel bars in the cavities and grouting, posttensioning with steel tendons, stitching, and adhering fiber-reinforced polymers (FRP) to increase capacity and enhance pseudoductility. In this study, a fabric-reinforced cementitious matrix (FRCM) system is applied to URM walls to determine its feasibility as an alternative external strengthening technology. The experimental program consists of testing a total of nine clay brick walls under diagonal compression. Two FRCM strengthening reinforcement schemes are applied, namely, one and four reinforcement fabrics. An analytical model is used to calculate the shear capacity of strengthened URM walls and compare its results with the experimental database. The effect of limitations in design approach on shear capacity of strengthened walls is discussed.

Original languageEnglish (US)
Article number04013045
JournalJournal of Composites for Construction
Issue number2
StatePublished - Apr 1 2014


  • Clay brick unreinforced masonry
  • Fabric-reinforced cementitious matrix
  • Shear strength
  • Strengthening

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Ceramics and Composites
  • Mechanical Engineering
  • Mechanics of Materials


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