Fracture stability and residual strength assessment of reinforced concrete beams

Sain, Trisha and Kishen, Chandra JM (2008) Fracture stability and residual strength assessment of reinforced concrete beams. In: Materials and Structures, 41 (8). pp. 1451-1463.

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Abstract

In conventional analysis and design procedures of reinforced concrete structures, the ability of concrete to resist tension is neglected. Under cyclic loading, the tension-softening behavior of concrete influences its residual strength and subsequent crack propagation. The stability and the residual strength of a cracked reinforced concrete member under fatigue loading, depends on a number of factors such as, reinforcement ratio, specimen size, grade of concrete, fracture properties, and on the tension-softening behavior of concrete. In this work, a method is proposed to assess the residual strength of reinforced concrete beams subjected to cyclic loading. The crack extension resistance based approach is used for determining the condition for unstable crack propagation. The effect of reinforcement is modeled as a closing force counteracting the effect of crack opening produced by the external moment. The effect of percentage reinforcement and specimen size on the failure of reinforced beams is studied. Finally, the residual strength of the beams are computed by including the softening behavior of concrete.

Item Type:	Journal Article
Publication:	Materials and Structures
Publisher:	Springer
Additional Information:	Copyright of this article belongs to Springer.
Keywords:	Reinforced concrete;residual strength;fracture;fatigue;crack extension resistance;tension softening.
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	06 Oct 2008 06:58
Last Modified:	19 Sep 2010 04:51
URI:	http://eprints.iisc.ac.in/id/eprint/16135

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