Title: Review of Tests on Ferrocement Retrofitted Unreinforced Masonry

Author(s): Raquib Ahsan, Shegufta Zahan, and Jannatun Nahar

Publication: Symposium Paper

Volume: 358

Issue:

Appears on pages(s): 179-205

Keywords: Cyclic Loading, Ferrocement, Retrofitting, URM

DOI: 10.14359/51740236

Date: 9/1/2023

Abstract:
Unreinforced masonry (URM) structures are very common in South Asian countries. They can sustain vertical loads but are vulnerable against lateral loadings. This paper presents review of previously performed research on wall unit, reduced scale model and full-scale model of URM structures retrofitted with ferrocement. Researchers of Bangladesh, over the last five years, have implemented ferrocement overlay retrofitting on URM structures using indigenous materials. The research covered examining the performance of unit wall (without frame), half scale wall, full scale wall, and half scale room of retrofitted URM. The present study describes the differences in the experimental set ups and loading patterns of these studies, examines the lateral loading capacity determined in these studies and compares the failure patterns observed in the tests to the theoretically predicted ones. Finally, the paper compares performance in terms of load bearing capacity, cumulative energy consumption and stiffness degradation per cycle. It is found that previous studies were consistent in showing that ferrocement retrofitting using 18-gauge wire having mesh opening of 12.5 mm [0.5 in] x 12.5 mm [0.5 in] can improve the load bearing capacity of a wall by 40-50%, and the energy consumption before failure increases 1.4 times the reference unreinforced structure.