Elevated railway bridges in urban areas are often constructed under spatial restrictions in a limited span of time. Thus, improved work efficiency and rapid work progress are essential requirements. Moreover, railway structures are required to show high fatigue and seismic resistance. The hybrid railway elevated bridge is a type of structure that meets such requirements. The authors have already proposed a method to evaluate the performance of the column of concrete filled steel tube (CFT) and beam of steel/rein-forced concrete beam, which compose a hybrid railway rigid frame elevated bridge. However, there have been almost no studies on the joint of concrete filled steel tube column.
This paper discusses a design method of a newly developed beam-to-column insert joint, with cruciform steel and reinforcing bars inserted into CFT, on the basis of experimental study on its load bearing capability.