THREE POINT BENDING TEST OF COLD FORMED SHS COLUMN TO THROUGH DIAPHRAGM WELDING CONNECTION USING 25 DEGREE NARROW GROOVE

This study presents the results of a three-point bending test performed on a cold-formed square hollow section (SHS) column to a through diaphragm welding connection using a 25 degree narrow groove. The test results are summarized as follows: The deformation capacity of a cold-formed SHS column to a through diaphragm welding connection by using a 25 degree narrow groove is comparable to or higher than that obtained in previous tests by using a 35 degree standard groove. Relieving the stress concentration at the weld toe through grinder finishing delayed ductile crack initiation, thus improving the deformation capability of the welded connection of the cold-formed SHS column.