강판 및 탄소섬유 sheet로 보강된 R/C보의 반복크리프 개념을 적용한 피로거동예측

The Prediction of Fatigue Behavior using Cyclic Creep Concept of R/C Beam Strengthened with Steel Plate and Carbon Fiber Sheet

Fatigue strength of concrete is ususlly presented by the Wohler Curve. But, new dimension T(time) from the view point of cyclic creep concept should be considerd. This paper presented four variable F-N-T-R relationship, this four variable relationship simultaneously accounts for the time effect and the effect of load rate. And analytical models are presented to predict fatigue strength of R/C beam strengthened with steel plate and carbon fiber sheet. Also, the correlation between the ratio of stress and the fatigue life was investigated.