Diagonal tensile tests on historical brick masonry wallets strengthened with fabric reinforced cementitious mortar

Ihsan Engin Bal, Alper Ilki, Irem A. Balci, Medine Ispir, Pelin E. Mezrea

Research output: Contribution to journalArticleAcademicpeer-review


Masonry structures comprise a significant portion of the historical building stock all over the world. Previous
studies have clearly pointed out that unreinforced masonry buildings are vulnerable against extreme loading
conditions, such as seismic actions. Therefore, strengthening is inevitable in most cases for historical masonry to
withstand severe loads. In this paper, the efficiency of fabric reinforced cementitious matrix is investigated
experimentally by using diagonal tension tests. Fourteen wallets with a nominal size of 750x750x235 mm were
produced with using solid clay bricks and a low-strength mortar. The bricks were collected from the structural
walls of an early-20th century building under restoration. The low-strength mortar represents the historical
mortar commonly used in similar historical brick masonry buildings located in Istanbul, Turkey. By testing the
specimens under monotonic diagonal compression loads, the effects of different types of plasters on the wallet
surface, varying types of fibers used in textile reinforcement and anchors used for the connection between FRCM
and substrate are investigated. Although the wallet samples have inherent shortcomings in representing overall
component response accurately, still the qualitative findings are enlightening the effectiveness of the FRCM
system by increasing shear strength, stiffness (shear modulus) and dissipated energy of the masonry wallets. The
strengthened specimens were failed due to shear sliding along a bed joint and/or by a stair-shaped separation
while the refence specimens were failed due to the splitting of the specimen into two parts in the stair-stepped
shape and a slipping through a bed joint.
Original languageEnglish
Article number11
Pages (from-to)935-946
Number of pages12
Publication statusPublished - 17 May 2021


  • earthquakes
  • wall strengthening
  • sensor technology
  • FRCM
  • masonry


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