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초음파 펄스를 이용한 철근콘크리트 구조물의 균열 깊이 측정에 관한 연구
오병환(Oh Byung-Hwan),김지상(Kim Zi-Sang),김세훈(Kim Se-Hoon),백낙승(Paek Nak-Seung) 한국구조물진단유지관리학회 2005 한국구조물진단학회 학술발표회논문집 Vol.- No.-
Ultrasonic pulse velocity method is employed for evaluation of crack depth in concrete structures. Due to the heterogeneous nature of concrete and the indirect transmission arrangement for the transit time measurement through the surface-opening cracks in concrete structures, ultrasonic pulse velocity has so many variations as crack depths and transmission length vary. In this study, ultrasonic pulse velocity method is investigated to evaluate the surface-opening crack depth of concrete slabs, reinforced concrete slabs, reinforced concrete flexural members. A resonable method is presented to detect the crack depth of concrete structures.
김지상 ( Kim Jee-sang ),오병환 ( Oh Byung-hwan ),백낙승 ( Paek Nak-seung ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.1
This paper deals with an assessment of compressive strength of normal and high strength concrete using rebound hammer test and ultrasonic wave method. Most existing formulas for strength evaluation using NDT have been obtained on the experimental results of normal strength concrete. There are also few experimental results on the NDT of deteriorated concrete. In this paper, some on-going experimental results are summarized, in which the variables are compressive strength of concrete, age, degree of deterioration and load histories. It is found that some refinements are required assessment of compressive strength in existing concrete structures when rebound hammer and ultrasonic wave method are applied.
초음파 펄스를 이용한 철근콘크리트 구조물의 균열 깊이 측정에 관한 연구
오병환 ( Oh Byung-hwan ),김지상 ( Kim Zi-sang ),김세훈 ( Kim Se-hoon ),백낙승 ( Paek Nak-seung ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.1
Ultrasonic pulse velocity method is employed for evaluation of crack depth in concrete structures. Due to the heterogeneous nature of concrete and the indirect transmission arrangement for the transit time measurement through the surface-opening cracks in concrete structures, ultrasonic pulse velocity has so many variations as crack depths and transmission length vary. In this study, ultrasonic pulse velocity method is investigated to evaluate the surface-opening crack depth of concrete slabs, reinforced concrete slabs, reinforced concrete flexural members. A resonable method is presented to detect the crack depth of concrete structures.