Research Article
Feb 1965
Effect of Large Alternating Strains of Steel Beams
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VIEW THE REPLYPublication: Journal of the Structural Division
Volume 91, Issue 1
Abstract
Eleven 4 by 4 M 13.0 structural steel cantilever beams were subjected to cyclic reversed loading. The maximum strain at the clamped end was carefully controlled and varied between ± 1.0% and 2.5%. In all instances, except for 1% controlling strain, the strains induced in the distorted flanges caused early formation of cracks that finally led to the fracture of the beam. In the experiments the number of cycles to cause fracture varied from 16 to 650. A drastic drop in the low cycle fatigue endurance occurred in the beams as the controlling strain was increased. An analogous relationship was observed between the number of cycles causing the initiation of local buckling of flanges and controlling strain. Based on these experiments it is concluded that in low cycle fatigue of structural steel members of large strains, local buckling of flanges is of the utmost importance. The problem of preventing local buckling of elements is considerably more important than that which concerns the low fatigue endurance of the material itself.
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Published In
Journal of the Structural Division
Volume 91 • Issue 1 • February 1965
Pages: 1 - 12
Copyright
© 1965 American Society of Civil Engineers.
History
Published in print: Feb 1965
Published online: Feb 1, 2021
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Authors
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Vitelmo V. Bertero, M.ASCE
Assoc. Prof. of Civ. Engrg., Univ. of California, Berkeley, Calif.
Egor P. Popov, M.ASCE
Prof. of Civ. Engrg., Univ. of California, Berkeley, Calif.
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.