Fatigue resistance of reinforced concrete members for strengthening of shear with carbon fiber and PVA fiber to assume water penetration

Abstract

The fatigue resistance of RC decks subjected to water penetration is known to become significantly degraded. However, it has been found that the fatigue resistance can be improved by shear reinforcement using carbon fiber grids and PVA fibers in a cross-section of a singly reinforced concrete deck. Although a quantitative evaluation of the optimum amount of reinforcement has not yet been performed. In this study, the fatigue resistance was examined based on fatigue loading tests and a three-dimensional FEM analysis using beam specimens in order to evaluate the synergistic effect under fatigue action. The results indicated that both carbon and PVA fibers had a significant effect on fatigue resistance. Therefore, the fatigue resistance was verified by fatigue tests on RC decks.