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I형 휨 부재에서 균열 크기에 따른 변형률 측정 민감도 분석
박휘립(Park Philip),허용학(Huh Yong-Hak),김동진(Kim Dong-Jin),전대형(Jeon Dea-Hyoung),손병직(Son Byung Jik) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
Stram variations with various sizes of a crack in I-sectioned flexural member were investigated by finite element analysis and fatigue experiment As a parameter to estimate the crack in I-beam, a stram compliance were defined. In the section containing the crack, the strains at the positions of back face of the crack, compressive flange side, and tensile flange side were acquired during the fatigue experiment
I형 휨 부재에서 균열 크기에 따른 변형률 측정 민감도 분석
박휘립 ( Park Philip ),허용학 ( Huh Yong-hak ),김동진 ( Kim Dong-jin ),전대형 ( Jeon Dea-hyoung ),손병직 ( Son Byung Jik ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.2
Strain variations with various sizes of a crack in I-sectioned flexural member were investigated by finite element analysis and fatigue experiment. As a parameter to estimate the crack in I-beam, a strain compliance were defined. In the section containing the crack, the strains at the positions of back face of the crack, compressive flange side, and tensile flange side were acquired during the fatigue experiment. Measured back face strain(BFS) compliances and the strain compliances at compressive flange side(CFS) showed stable increment with crack growth and well agreed with finite element analysis result. From these results, a relationships between the crack size and BFS/CFS compliances were acquired by regression analysis. Sensitivity of the strain variation along longitudinal direction of the beam were also investigated and a relationship between the sensitivity and the distance from the cracked section were acquired. Those results show a possibility to estimate cracks in structural beams by monitoring the strain compliance and can be applied to structural health monitoring system.