Straightening effects of steel I-beams failed by lateral-torsional buckling

摘要

This paper presents experimental results on the gag straightening effects of steel beams failed by lateral-torsional buckling. Eight different welded I-sections were tested under a central concentrated load at a simply supported beam. In the first buckling tests loads were applied until unloading region of approximately 60% of the maximum moment for each beam. After the residual deformations were straightened by press working, the second buckling tests were carried out under the same loading conditions. The ultimate strength and the rotation capacity were compared with the two cases in order to investigate their recovery.