FRP-Confined Clay Brick Masonry Assemblages under Axial Compression: Experimental and Analytical Investigations
Publication: Journal of Composites for Construction
Volume 19, Issue 4
Abstract
Unreinforced masonry (URM) structures that are in need of repair and rehabilitation constitute a significant portion of building stock worldwide. The successful application of fiber-reinforced polymers (FRP) for repair and retrofitting of reinforced-concrete (RC) structures has opened new avenues for strengthening URM structures with FRP materials. The present study analyzes the behavior of FRP-confined masonry prisms under monotonic axial compression. Masonry comprising of burnt clay bricks and cement—sand mortar (generally adopted in the Indian subcontinent) having ratio less than one is employed in the study. The parameters considered in the study are, (1) masonry bonding pattern, (2) inclination of loading axis to the bed joint, (3) type of FRP (carbon FRP or glass FRP), and (4) grade of FRP fabric. The performance of FRP-confined masonry prisms is compared with unconfined masonry prisms in terms of compressive strength, modulus of elasticity and stress-strain response. The results showed an enhancement in compressive strength, modulus of elasticity, strain at peak stress, and ultimate strain for FRP-confined masonry prisms. The FRP confinement of masonry resulted in reducing the influence of the inclination of the loading axis to the bed joint on the compressive strength and failure pattern. Various analytical models available in the literature for the prediction of compressive strength of FRP-confined masonry are assessed. New coefficients are generated for the analytical model by appending experimental results of the current study with data available in the literature.
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Acknowledgments
The research investigations carried out in this paper were funded by CiSTUP, IISc, Bangalore through project No. CIST 0036, and the authors would like to gratefully acknowledge the support extended by the donor institution.
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© 2014 American Society of Civil Engineers.
History
Received: Feb 13, 2014
Accepted: Jul 30, 2014
Published online: Sep 29, 2014
Discussion open until: Feb 28, 2015
Published in print: Aug 1, 2015
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