Damage Quantification in Concrete under Fatigue Loading Using Acoustic Emission

Zhi Shan,Xiao Li,Ying Xie,Zhiwu Yu

doi:10.1155/2019/1359853

Abstract

Acoustic emission (AE) is an effective nondestructive evaluation method for assessing damage in materials; however, few works in the literature have focused on one quantification method of damage in concrete under fatigue loading by using AE for characterizing the entire three main deterioration behaviors simultaneously. These deterioration behaviors include Young’s modulus degradation, fatigue total strain, and residual strain development. In this work, an AE quantification method of fatigue damage in concrete was developed, by combining AE and a fiber bundle-based statistical damage model (fiber bundle-irreversible chain model). By establishing a relationship between normalized AE counts and the damage variable based on the fiber bundle-irreversible chain model, the method was proposed. Additionally, this method was verified against the experimental results. It is able to capture the mechanisms of damage accumulation and characterize the three deterioration behaviors simultaneously.

Highlights

Acoustic emission (AE), as a nondestructive evaluation and diagnostic technique, has been developed for more than three decades [1,2,3,4,5,6]
Few works in the literature have focused on one quantification method of damage in concrete under fatigue loading by using AE for characterizing the entire three deterioration behaviors simultaneously
Wang et al [15] conducted the comparison on the fatigue properties among plain concrete, rubberized concrete, and polypropylene fiber-reinforced rubberized concrete by applying AE, and the results showed a linear Journal of Sensors correlation between the AE counts and the residual strain for plain and rubberized concrete, respectively

Summary

Introduction

Acoustic emission (AE), as a nondestructive evaluation and diagnostic technique, has been developed for more than three decades [1,2,3,4,5,6]. The fiber bundle-irreversible chain model (BCM, the expression “plastic chain” [41] is corrected by “irreversible (deformation) chain” in this work based on the literature [27, 31,32,33,34,35,36,37,38,39,40]) was developed based on the FBMs for describing the abovementioned deterioration behaviors of quasibrittle materials under fatigue loading during the lifetime This model was verified to be able to capture the major microscopic mechanisms of the deterioration behaviors against the experimental results [41]. The further work concerning the damage and AE responses of reinforced concrete structures will be conducted by the authors’ research team

Fiber Bundle-Irreversible Chain Model with Damage Accumulation

Acoustic Emission Quantification of Fatigue Damage

Verification and Discussion

Conclusions