Issues‎ > ‎Vol.7 No.1‎ > ‎

sjes-10122


In-plane Shear Strengthening of Masonry Walls after Damage

Ahmed Mohamed Raouf Abdul-qadir1Jalal Ahmed Saeed1


1University of Sulaimani, College of Engineering, Civil Engineering Department 


Received 15 July 2019,     Accepted 28 August 2019,      Published 1 April 2020

ABSTRACT 


This study investigates the effect of 5 different strengthening materials on damaged Un-Reinforced Masonry (URM) brick walls under an in-plane lateral loading and a predefined uniform vertical load. Five clay brick walls with a dimension of (1200 × 935 × 115) mm were tested then strengthened with plastic mesh, glass fiber mesh, steel mesh, wild cane strips, and chopped steel fibers. The walls were tested again up to failure in order to determine the best material in terms of shear strength and ductility. Two more walls were tested similarly without strengthening to serve as control walls. Based on the experimental results, GM-r (strengthened with glass fiber mesh) had the highest ductility factor of 23.2 and showed the best strength retention amongst the strengthened walls. OG-r (strengthened with wild cane grid) had the highest toughness ratio value of 10.1 even though it is not suitable for exterior walls due to biological factors such as rotting and incompatibility with high moisture areas. SM-r (strengthened with steel mesh) retained 89% of the damaged wall and at the same time inadequate in seismic areas due to its sudden brittle de-bonding failure. Walls PM-r and SF-r lacked strength and ductility retention, respectively, to be considered as a feasible option in sustaining lateral loads.

KEYWORDS 

Damaged wall, In-plane loading, Masonry wall, Shear strength, strengthening materials

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