Abstract
This paper investigates the effects of RC pile nonlinear behavior in view of the bending moment-axial force relationship on the response of a pile-supported bridge system. The analysis is conducted based on BEM-FEM hybrid technique. The RC nonlinear behavior is represented according the modified Q hyst model that takes into account the relationship between bending moment-curvature dependent on axial force. The results of analysis indicate that the soil behavior is practically insensitive to RC piles behavior, the presence of axial force in piles affects the pile behavior and the heavy damage in the Hanshin disaster may possibly be due to tension force and bending moment interaction.
