EVALUATION OF FATIGUE DURABILITY AND PROPOSAL OF S-N CURVE FOR DECK OF HIGHWAY BRIDGE USING STEEL FIBER REINFORCEMENT CONCRETE

Abstract

This study proposed steel fiber reinforcement concrete（SFRC）slabs using ordinary portland cement and high-early-strength portland cement for the binding agent. Furthermore, the authors conducted evaluation of fatigue durability and proposal of S-N curve in SFRC slabs. The fatigue durability was evaluated from the result, the number of equivalent cycle of SFRC slabs were improved in contrast with the number of equivalent cycle of RC slab. In addition to the above, we proposed S-N curve using punching shear load-carrying capacity（P_sx.SF）of near the failure load of SFRC slab. The calculation of punching shear loading-carrying capacity（P_sx.SF）was applied 85％ of the respective strength of the shear strength and the tensile strength for the SFRC. Therefore, it is possible to estimate the life of SFRC slabs.