1998 Volume 63 Issue 504 Pages 95-101
Recently, beams with large depth-thickness ratio are used. As a result, a rank of slenderness ratio of plate elements constituting beam may be different greatly. In this study, the large deformation behavior of high strength steel beams with large depth-thickness ratio is examined. As a result, beams with stocky flange plate have enough plastic deformation capacity, however these beam have thin web plate. So these beams may be used as plastic design beams. In such beam, constitution plate elements do not collapse simultaneously, collapse at intervals. Because plate elements give restriction action mutually, that plastic deformation capacity of beam becomes large.
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