Research Article
Jan 1977
Simple Illustration of Frame Instability
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VIEW THE REPLYPublication: Journal of the Structural Division
Volume 103, Issue 1
Abstract
The problem of frame instability is not confined to tall and indeterminate frameworks. The problem is elucidated through an example of a three-hinged portal frame. The commonly accepted analysis of this frame is shown to be grossly unconservative. Several approximate and exact analyses are presented. They show that the essence of correct stability analysis is the proper accounting for load distribution within the frame under deformation. A simple test of this frame is described. Results confirm the analysis within the accuracy to be expected. It is concluded that there is a need for improved design aids to find the effective lengths of compression members in frames.
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Published In
Journal of the Structural Division
Volume 103 • Issue 1 • January 1977
Pages: 1 - 8
Copyright
© 1977 American Society of Civil Engineers.
History
Published in print: Jan 1977
Published online: Feb 1, 2021
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Authors
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Niels C. Lind, AM.ASCE
Prof. of Civ. Engrg., Univ. of Waterloo, Waterloo, 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.