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Evaluation of damage in reinforced concrete bridge beams using acoustic emission technique

Sagar, Vidya R and Prasad, Raghu BK and Sharma, Reema (2012) Evaluation of damage in reinforced concrete bridge beams using acoustic emission technique. In: NONDESTRUCTIVE TESTING AND EVALUATION, 27 (2). pp. 95-108.

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Official URL: http://dx.doi.org/10.1080/10589759.2011.610452

Abstract

Acoustic emission (AE) testing is a well-known method for damage identification of various concrete structures including bridges. This article presents a method to assess damage in reinforced concrete (RC) bridge beams subjected to incremental cyclic loading. The specifications in the standard NDIS-2421 were used to classify the damage in RC bridge beams. Earlier researchers classified the damage occurring in bridge beams by using crack mouth opening displacement (CMOD) and AE released and proposed a standard (NDIS-2421: the Japanese Society for NonDestructive Inspection). In general, multiple cracks take place in RC beams under bending; therefore, utilisation of CMOD for crack detection may not be appropriate. In the present study, the damage in RC beams is classified by using the AE released, deflection, strains in steel and concrete, because the measurement of the strains in steel and concrete is easy and the codes of practice are specified for different limit states (IS-456:2000). The observations made in the present experimental study have some important practical applications in assessing the state of damage of concrete structural members.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Taylor and Francis
Keywords: concrete beam damage;fracture mechanics acoustic emission testing;NDT method;damage assessment;structural health monitoring
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 23 Jun 2012 06:00
Last Modified: 23 Jun 2012 06:00
URI: http://eprints.iisc.ernet.in/id/eprint/44717

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