TECHNICAL PAPERS
Apr 1, 1987
Inelastic Buckling of Welded Monosymmetric I‐Beams
Publication: Journal of Structural Engineering
Volume 113, Issue 4
Abstract
The inelastic buckling of welded monosymmetric I‐beams under uniform moment has been investigated. The assumed welding residual stress is based on the so‐called “tendon force concept” developed by the Cambridge group. The residual stresses are shown to be dependent on the connecting plate sizes, weld areas, and the welding process. The assumed residual stress pattern consists of a fully yielded tensile stress block of width in the flange at the weld, and a constant residual compressive stress at the outer edges to maintain equilibrium. The influences of the degree of beam monosymmetry, ρ, and the values of c are examined. It is shown that the inelastic buckling capacities decrease with ρ and with increasing c values. Theoretical inelastic buckling moments compared well with Fukumoto's test results, except for the very high strength grade steel. Present inelastic beam design rules in AS1250, AISC specifications, ECCS, and BS5950 are reviewed. A simple method of determining the inelastic buckling moment for welded monosymmetric I‐beams is proposed.
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Copyright © 1987 ASCE.
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Published online: Apr 1, 1987
Published in print: Apr 1987
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Sritawat Kitipornchai
Assoc. Prof. in Civ. Engrg., Univ. of Queensland, St. Lucia, Australia
Alain D. Wong‐Chung
Research Student in Civ. Engrg., Univ. of Queensland, St. Lucia, Australia
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