Full-Scale Test on Plastic Rotation Capacity of Steel Wide-Flange Beams Connected with Square Tube Steel Columns

(Parti :Test Plan and Pilot Test)

Abstract

This paper presents the background, objectives, organization, and outline of a comprehensive experimental project conducted by the Steel Committee of the Kinki Branch of the Architectural Institute of Japan. The objectives are to re-evaluate the plastic deformation capacity of beams in moment resisting frames and to offer improved connection details for better ductility. A total of 86 full-scale beam-column subassemblages were tested, with major test parameters as the grade of steel, type of connection, type of connection details, type of run-off tabs, loading rate, and temperature. Details of those major parameters are explicated, and results of preliminary tests applied to 3 specimens are described. The preliminary tests indicated improved ductility when modified connection details are adopted.