성능 향상된 교량 바닥판에서의 피로수명에 대한 확률론적 해석

Abstract

This study shows the fatigue test results of experiment on the strengthened slabs, the probability analysis of the fatigue behavior is also presented. Static and fatigue tests were performed on bridge decks strengthened with fiber plastics(Carbon Fiber Sheet, Glass Fiber Sheet, Grid Type Carbon Fiber). In this study, to analyze the probabilistic distribution of the fatigue life, the Weibull distribution was adopted. The Weibull distribution coefficient is inferred from the S-N diagram and the number of repeated load. As the result of analysis, as the stress level is higher, the fatigue limit life of the strengthened bridge decks are similarly discovered but in the range of the fatigue limit. CG specimen that was strengthened with Grid Type Carbon was proved most effective of reinforcement.