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Analysis of deformation behaviour of single storey frames subjected to different loading forces

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Author(s): Okonkwo V. O | Onyeyili I. O | Aginam C. H | Onodagu P. D

Journal: Journal of Innovative Research in Engineering and Sciences
ISSN 2141-8225

Volume: 3;
Issue: 1;
Start page: 421;
Date: 2012;
Original page

Keywords: axial deformation | shear deformation | beam column effects | stiffness matrix

ABSTRACT
A multistory frame with variable vertical and horizontal loads and a variable cross-sectional dimension was analysed for the internal stresses developed at the members’ ends. The contribution of bending deformation, axial, shear deformation and beam column effects and their variation with external loads and member section size were investigated. These revealed a linear relationship between external loads and the contribution due to shear and axial deformation; a non-linear relationship between the contribution due to beam column effect and external loads and a non-linear relationship between the section sizes and the contribution of deformation due to axial, shear and beam column effect. The change in the end stiffness of prismatic members due to the presence of axial forces (also known as beam column effect) was found not to seriously impair the results of structural analysis. Also found was that as the geometrical sizes of the cross-sections of structural elements increase their contribution (beam column effects) vanish and so should be ignored in the deformation response of loaded frames.

Tango Jona
Tangokurs Rapperswil-Jona

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