Research Article
Mar 1978
The Safety of Steel Columns
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VIEW THE REPLYPublication: Journal of the Structural Division
Volume 104, Issue 3
Abstract
Traditional design of steel columns is analyzed with a view towards actual and assumed factors of safety. It is shown that due to the variation of strength that is caused by the randomness of the column strength parameters, the real margins of safety differ from what is prescribed by the design specifications. A study of several typical column shapes shows that realistic factors of safety vary between 1.4 and 2.1, as compared to the assumed values of 1.67 to 1.92. Column design improvements are evaluated, and it is shown that an approach that involves the use of several (multiple) column curves is particularly feasible. The development of such curves in the United States is described, and it is shown that the differences between real and assumed column strength values will be significantly diminished. The traditional factor of safety concept is analyzed, and an alternative approach suggested that will lead to consistent and uniform levels of safety. This development is put in perspective by a formulation that allows its use in load and resistance factor design.
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Published In
Journal of the Structural Division
Volume 104 • Issue 3 • March 1978
Pages: 463 - 477
Copyright
© 1978 American Society of Civil Engineers.
History
Published in print: Mar 1978
Published online: Feb 1, 2021
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Authors
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Reidar Bjorhovde, M.ASCE
Assoc. Prof. of Civ. Engrg., The Univ. of Alberta, Edmonton, Alberta, Canada
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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.