한국구조물진단유지관리공학회 논문집 (Journal of the Korea institute for structural maintenance and inspection)
- 제3권4호
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- Pages.215-220
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- 1999
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- 2234-6937(pISSN)
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- 2287-6979(eISSN)
노치가 있는 콘크리트 보에서 균열검출을 위한 음향방출기법의 적용
Application of Acoustic Emission Technique for Detection of Crack in Notched Concrete Beams
- 투고 : 1999.11.29
- 발행 : 1999.10.31
초록
Concrete micro-cracks that are grown while the structures are under construction or in service, propagate gradually or rapidly by external forces and environmental effects. As described above, almost concrete structures generally have cracks, so for the safety and durability of structures, studies to detect cracks using nondestructive tests have been treated in great deal. The purpose of this study is to evaluate characteristics of AE signals detected from notched concrete beams bending test with different loading using one of nondestructive test, Acoustic Emission (AE) method. Furthermore this study predicts the location of initial crack and measures direction of crack propagation for on-line monitoring before the crack really grows in structures by using two-dimensional AE source location based on rectangular method with three-point bending test. This will allow efficient maintenance of concrete structures through monitoring of internal cracking based on acoustic emission method.