Abstract
After Northridge Earthquake and Hyogoken-Nanbu Earthquake, many experimental studies on beam-to-column connections have been conducted in both US and Japan. As a result, it was revealed that welded unreinforced flange, bolted web connections (WUF-B) in US were lack of plastic deformation capacity. This paper presentscomparison of design method of WUF-B between US and Japan. And it discusses influence of panel zone strength and beam depth on plastic deformation capacity. Furthermore, a new type beam-to-column connection, which is developed in US and called free flange connection, is introduced.
