FRP-Confined Clay Brick Masonry Assemblages under Axial Compression: Experimental and Analytical Investigations

Rao, Nanjunda KS and Pavan, GS (2015) FRP-Confined Clay Brick Masonry Assemblages under Axial Compression: Experimental and Analytical Investigations. In: JOURNAL OF COMPOSITES FOR CONSTRUCTION, 19 (4).

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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 E-b/E-m 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. (C) 2014 American Society of Civil Engineers.

Item Type:	Journal Article
Publication:	JOURNAL OF COMPOSITES FOR CONSTRUCTION
Publisher:	ASCE-AMER SOC CIVIL ENGINEERS
Additional Information:	Copy right for this article belongs to the ASCE-AMER SOC CIVIL ENGINEERS, 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA
Keywords:	Masonry; Fiber-reinforced polymers (FRP); Confinement; Inclination of loading axis to the bed joint; Compressive strength; Stress-strain response
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	19 Aug 2015 05:20
Last Modified:	19 Aug 2015 05:20
URI:	http://eprints.iisc.ac.in/id/eprint/52136

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