Abstract
In the 1995 Hyogokenn-Nanbu Earthquake, a brittle fracture occurred at steel pier beam-column joint without web corner fillet. Then we conducted a super-low-cycle fatigue experiment in order to investigate the cracking behavior in the steel pier beam-column joint without web corner fillet. Cracks with the surface length of 2-i imm were detected in a few cycles at the fillet weld toe on the column flange, which was fractured after more few cycles. Fatigue life of steel pier beam-column joint specimens without web corner fillet, was reduced to be about a half of that with web corner fillet with the radius of 20mm.
