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Indexed by:期刊论文

Date of Publication:2012-07-01

Journal:SENSORS

Included Journals:SCIE、PubMed、Scopus

Volume:12

Issue:7

Page Number:9502-9513

ISSN No.:1424-8220

Key Words:PVA fiber-reinforced concrete; temperature fatigue; acoustic emission; damage assessment; health monitoring

Abstract:The applicability of acoustic emission (AE) techniques to monitor the mechanism of evolution of polyvinyl alcohol (PVA) fiber concrete damage under temperature fatigue loading is investigated. Using the temperature fatigue test, real-time AE monitoring data of PVA fiber concrete is achieved. Based on the AE signal characteristics of the whole test process and comparison of AE signals of PVA fiber concretes with different fiber contents, the damage evolution process of PVA fiber concrete is analyzed. Finally, a qualitative evaluation of the damage degree is obtained using the kurtosis index and b-value of AE characteristic parameters. The results obtained using both methods are discussed.