2025 Volume 81 Issue 13 Article ID: 24-13558
Beam-to-column connections of steel rigid frame piers affect the seismic performance of piers, so it is important that they have strength and ductility. On the other hand, the beam-to-column connections of steel bridge piers made of SBHS500 is expected to be reasonably designed in terms of thickness reduction and weldability. However, there are few research data on elasto-plastic behavior of beam-to-column connections of steel bridge piers made of SBHS500. In this study, cyclic loading experiments of beam-to-column connections of steel bridge piers made of SBHS500 and SM490Y were carried out in order to investigate the influence of steel type on the elasto-plastic behavior of beam-to-column connections of steel bridge piers. In addition, it was assumed that beam-to-column connections of steel bridge piers made of SBHS500 with a high yield ratio might have inferior strength and ductility. Therefore, the same experiment was conducted on a specimen with a higher longitudinal rib stiffness ratio as an improvement measure.
The results showed that the strength and ductility of SM490Y tended to be higher than those of SBHS500. And the increase in the longitudinal rib stiffness ratio was effective in mitigating the load drop after the maximum turnaround point.
