Frame Stability - A Canadian Designer's Approach

by John Springfield, Carruthers & Wallace Ltd, Toronto, Ont, Can,

Document Type: Proceeding Paper

Part of: Materials and Member Behavior


The deficiencies and fallacies of the simplistic effective column length approach to frame stability are demonstrated through its application to a 57-story rigidly framed building structure. The application of second order elastic analysis to the design of this structure is discussed. By way of a further design example, the inability of the second order approach to deal adequately with structures subject only to gravity loads is shown. The need for a stability approach rather than a deformed structure approach is suggested, and the application of two such methods demonstrated. Suggestions are made for further development.

Subject Headings: Frames | Rigid frames | Structural stability | Elastic analysis | Gravity loads | Effective length | Deformation (mechanics) | Building codes

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