Abstract
Steel beams with continuous and complete tension flange restraint buckle in a restrained distortional buckling (RDB) mode. Lateral buckling of half-through girders is an important example of this phenomenon because of the restraint offered by the deck, and due to the flexibility of the web in restraining the compressive flange. A numerical study was undertaken to investigate the distortional buckling behaviour of simply supported compact steel I-beams subjected to uniformly distributed load. For this purpose, a finite-element model was developed using ABAQUS. It was then used in a parametric study to simulate the distortional buckling behaviour and capacity of half-through girders, and investigate the effect of cross-section geometry and yield strengths in a RDB mode on the buckling moments of doubly-symmetric steel I-beams. Then a new formula based on the regression analyses has been proposed to predict the member moment capacities of steel I-beams subjected to RDB. The results indicate that the proposed...
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More From: The IES Journal Part A: Civil & Structural Engineering
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