Damage investigation of single-edge notched beam tests with concrete specimens using acoustic emission techniques

Document Type

Conference Proceeding

Publication Date

6-5-2013

Abstract

This study applied the AE techniques with statistical analysis to investigate the damage process of singleedge notched beam (SEB) tests with normal strength concrete specimens. The SEB tests with the labprepared NSC specimens were conducted by employing a clip-gauge controlled servo-hydraulic testing system and an AE damage detection system. It was found that the cumulative AE events with respect to the crack mouth opening displacement (CMOD) or the crack tip opening displacement (CTOD) correlate to the mechanical loading of the specimens. A Weibull rupture probability distribution was proposed to quantitatively describe the mechanical damage behavior under the SEB test. A bi-logarithmic regression analysis was conducted to calibrate the Weibull damage distribution with detected AE signals and to predict the damage process as a function of the crack opening displacements. The calibrated Weibull damage functions were compared among concrete specimens. The comparison results indicate the Weibull function calibrated with AE signals can describe the damage behavior of concrete beam specimens. © 2013 SPIE.

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

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