Abstract
Recently, many fatigue cracks were found in the beam-to-column connections of steel bridge frame piers in metropolitan expressway bridges. It was pointed that high stress concentrations occurred at the corner of beam-to-column connections, and caused fatigue cracks. In order to improve the fatigue performance of the beam-to-column connections, we proposed rib-installation. Effects of rib-installation were evaluated by the Finite Element Analyses and fatigue tests. As a results, it was found that the rib-installation was effective to reduce stress concentration at the corner of the beam-to-column connection, and rib-installation could improve fatigue performance of beam-to-column connections.
