THE POST-BUCKLING STRENGTH OF WIDE-FLANGE BEANS,
Rept. on Welded Continuous Frames and Their Components.
FRITZ ENGINEERING LAB LEHIGH UNIV BETHLEHEM PA
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A discussion is presented on a series of beam experiments which were performed to study the behavior of short, laterally braced wide-flange beams of as-rolled ASTM A-7 structural steel. Efforts were directed toward 1 the determination of the maximum permissible spacing of lateral supports for beams subjected to constant plastic moment, and 2 the study of the postbuckling strength and the cause of failure of relatively short beams. It was found that for beams with lengthweak axis radius of gyration less than or equal to 45 failure is triggered by local buckling of the compression flange. All the beams showed considerable post-buckling strength and in each case a plastic hinge of sufficient rotation capacity was formed. Beams longer than 45 times the weak axis radius of gyration failed due to lateral buckling. Author