A New Theory of Built-Up Columns

by Atle Gjelsvik, Columbia Univ in the City of New, York, New York City, United States,



Document Type: Proceeding Paper

Part of: Structural Engineering in Natural Hazards Mitigation

Abstract:

In laced, battened and other built up columns the shear stiffness of the web can have a significant effect on the overall buckling load. At the present time, such columns are analyzed by a method introduced by Engesser at the end of the last century. In this method, the real column whether closed or open web construction, is replaced by an idealized continuous column with the properties of what is usually referred to as a Timoshenko shear beam. Timoshenko shear beam theory is based on a kinematical postulate as to the deformation of an element. The present article presents an alternative theory of built up columns.

Subject Headings: Structural analysis | Buckling | Stiffening | Kinematics | Deformation (mechanics) | Construction methods | Beams

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