Analysis of fatigue crack growth in reinforced concrete beams

Ray, Sonalisa and Kishen, JMChandra (2014) Analysis of fatigue crack growth in reinforced concrete beams. In: MATERIALS AND STRUCTURES, 47 (1-2). pp. 183-198.

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Abstract

Mechanical behavior of reinforced concrete members is influenced by the action of unknown crack bridging reactions of rebars. Under cyclic loading, due to progressive growth of cracks, this bridging action contributes to the overall strength, stiffness and hysteretic behavior of the member. In this work, fatigue behavior of reinforced concrete beams are studied using a crack propagation law, developed using dimensional analysis for plain concrete with the effect of reinforcement being simulated through constraint exerted on the crack opening. The parameters considered in the model are fracture toughness, crack length, loading ratio and structural size. A numerical procedure is followed to compute fatigue life of RC beams and the dissipated energy in the steel reinforcement due to the shake down phenomenon under cyclic loading. Through a sensitivity study, it is concluded that the structural size is the most sensitive parameter in the fatigue crack propagation phenomenon. Furthermore, the residual moment carrying capacity of an RC member is determined as a function of crack extension by including the bond-slip mechanism.

Item Type:	Journal Article
Publication:	MATERIALS AND STRUCTURES
Publisher:	SPRINGER
Additional Information:	copyright for this article belongs to SPRINGER, NETHERLANDS
Keywords:	Cyclic loading; Reinforced concrete; Energy dissipation; Residual strength; Bond-slip
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	16 Mar 2014 11:24
Last Modified:	16 Mar 2014 11:24
URI:	http://eprints.iisc.ac.in/id/eprint/48653

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