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۱Elastic and Inelastic Behavior of Overhanging C–Beams: Experimental Study
نویسنده(ها): ، ،
اطلاعات انتشار: World Applied Sciences Journal، سي و سوم،شماره۸، ۲۰۱۵، سال
تعداد صفحات: ۱۱
Due to the lack of researches, either experimentally or theoretically, concerning the behavior and the strength of overhanging C–beams, the design of such C–beams is not sufficiently covered in the current standards and specifications. Their buckling length coefficients, specified in the current standards and specifications, were conducted for doubly–symmetric I–sections. In this research, an experimental program was performed to study the elastic and inelastic behavior of overhanging C–beams, bent about the major axis. Six full–scale overhanging beams were tested. The tip of the cantilever was subjected to a concentrated load applied at the top flange and was laterally–restrained at top and bottom flanges. The cantilever segment length ranged from 2700 mm to 4500 mm. Two sections were considered in the experimental program, UPN 160 and UPN 260. The longitudinal strains, near the root section were monitored. The vertical deflections, at the tip as well as other locations along the beam length, were recorded. The lateral displacements at many locations along the beam length were also observed. The failure modes of the tested beams ranged from yielding at the root section to lateral–torsional buckling, depending on the cantilever segment length and the beam section. A comparison showed that the ultimate moment capacities, computed according to different standards and specifications, ranged from conservative to overconservative, when compared to those obtained experimentally.
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