Plastic Behavior of Hollow Structural Sections

by Robert R. Korol, Asst. Prof.; Dept. of Civ. Engrg. and Engrg. Mech., McMaster Univ., Hamilton, Ontario, Canada,
John Hudoba, Municipal Engineer; Town of Burlington, Burlington, Ontario, Canada; formerly, Res. Asst., Dept. of Civ. Engrg. and Engrg. Mech., McMaster Univ., Hamilton, Ontario, Canada,


Serial Information: Journal of the Structural Division, 1972, Vol. 98, Issue 5, Pg. 1007-1023


Document Type: Journal Paper

Errata: (See full record)

Abstract: A series of tests on beams of hollow structural sections was conducted to determine their adequacy in plastic design. A minimum plastic rotation requirement of law times the elastic limit rotation prior to unloading below the fully plastic moment was used to separate sections into categories of plastic and allowable stress design. Local buckling caused by high residual stresses occurred for all but the very stocky sections (b/t < 15, in which b = flange width and t = thickness). The recommended slenderness limit is given by b/t < 150/(σo)1/2, in which σo = yield stress) a value considerably less than is currently recommended by CSA-S16 (1969) or AISC (1970).

Subject Headings: Plastic design | Allowable stress design | Plastics | Residual stress | Yield stress | Rotation | Maximum loads

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