Recent earthquakes have produced extensive damage in a large number of existing un-reinforced masonry (URM) buildings, showing the need of retrofit techniques for masonry structures. We tested under diagonal compression twenty-four URM panels reinforced with externally bonded carbon fiber reinforced polymer (CFRP) laminates and sheets. Panels with two configurations of the reinforcement were subjected to monotonic and cyclic loading. This paper reports the results of the tests in terms of strength, mechanism of failure, stiffness, and energy dissipation. External CFRP reinforcement decreases the thickness of the cracks and increases the shear strength and stiffness of the panels.
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