Influence of aggregate bridging on the fatigue behavior of concrete

Simon, Keerthy M and Kishen, Chandra JM (2016) Influence of aggregate bridging on the fatigue behavior of concrete. In: INTERNATIONAL JOURNAL OF FATIGUE, 90 . pp. 200-209.

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Abstract

The fracture process of concrete is characterized by various toughening mechanisms that exist at the macro crack tip. In this study, the crack growth resistance due to the bridging of aggregates (defined as bridging stress) is evaluated by relating the crack opening displacements at the macroscopic scale to the mesoscopic one by considering the fracture toughness and the elastic modulus of the interface between the coarse aggregate and the mortar. The influence of specimen size and the stress ratio on the bridging stress is studied. The effect of the bridging stress on the fatigue crack growth rate is predicted and the results are found to agree well with the experiments for normal and micro concrete. The residual strength of a damaged beam is computed in terms of the moment carrying capacity by considering the bridging resistance offered by the coarse aggregates. (C) 2016 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	INTERNATIONAL JOURNAL OF FATIGUE
Publisher:	ELSEVIER SCI LTD
Additional Information:	Copy right for this article belongs to the ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Keywords:	Bridging stress; Fatigue; Interface; Fracture toughness; Moment carrying capacity
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	20 Jul 2016 08:50
Last Modified:	20 Jul 2016 08:50
URI:	http://eprints.iisc.ac.in/id/eprint/54252

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