Interaction between Local and Lateral Buckling on Pultruded I-Beams
Publication: Journal of Composites for Construction
Volume 13, Issue 4
Abstract
This paper presents the results of an experimental work involving pultruded beams. The tests developed attempt to observe the interaction between local and global buckling in open-section beams. A modified three-point bending test with both ends clamped has been used in order to reduce the slenderness of the structural elements. By means of a finite-element model the critical bending moment has been calculated. Special care has been taken to obtain an accurate correspondence between the real test and the finite-element model. The comparison made between test results and critical bending moments showed that the above-mentioned interaction clearly reduces the lateral buckling load in the low slenderness range. Based on the experimental data, Dutheil’s formulation has been adjusted leading to a new design equation. The proposed equation showed a good correlation in the low slenderness range, but did not match well with experimental data from literature developed in the high slenderness range. For high slenderness values, using the critical bending moment seems to be the best design method. Therefore, more experimental work has to be done on pultruded beams in order to establish a suitable formulation to describe the transition between the low and high slenderness ranges’ behaviors.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 13 • Issue 4 • August 2009
Pages: 315 - 324
Copyright
© 2009 ASCE.
History
Received: May 26, 2008
Accepted: Jan 6, 2009
Published online: Mar 6, 2009
Published in print: Aug 2009
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