According to the revision of Japanese Specifications of Highway Bridges, it's possible that plastic resistance and ductility of members will be more effectively utilized depending on limit states of members in future. Ultimate limit state of high-strength frictional bolted joints should be determined considering the resistance and ductility to enhance resiliency of connected members. Authors have proposed the new ultimate limit state which is defined by bolt hole deformation by the bearing force of bolt and can secure safey margins of both resistance and ductility. In this study, numerical analysis was conducted to clarify the effect of various configurations on the bearing resistance and then the design bearing resistance was proposed with analytical and past experimental results.
