Brittle fracture of hot-rolled and cold-rolled steel square pipes

摘要

It has been pointed out in this decade that the currently used thick cold-formed box-section columns in building frames may fail in the mode of brittle fracture instead of load buckling, and that their ductility preceding brittle fracture may not be enough to resist a severe earthquake. In order to solve this problem, hot-rolled box-columns have been recently developed, in that the forming is done at high temperature to avoid cold working. In this study, the ultimate behaviors of the box-columns having through diaphragms, which is the current practice in building steel construction, were experimentally investigated.