Feasibility Study on Deterministic Failure Prediction by AE

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K14023
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Kyoto University (2016); Kumamoto University (2015)
• Principal Investigator: OHTSU Masayasu 京都大学, インフラシステムマネジメント研究拠点ユニット, 研究員 (80109016)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: アコースティック・エミッション / コンクリート非破壊検査 / 破壊予知 / インフラドック

Outline of Final Research Achievements

Based on the parameter analysis of Acoustic Emission (AE), the decrease in the average frequency and the increase in RA value are confirmed to be applicable to the failure prediction. With relation to an application of the earthquake prediction, diagonal-shear failure in a reinforced concrete beam (RC) similar to fault motion is studied, applying the SiGMA analysis. Thus, nucleation of tensile cracks in the early stage of shear failure is clarified. Crack classification by AE parameter analysis is applied to concrete structures under traffic loads. It is found that the time for repair could be estimated quantitatively by periodical measurements. Associated with a deterministic prediction of failure, an infra-dock is proposed for the prognosis of concrete structures in service.

Free Research Field

コンクリート構造診断学