Matrix Analysis of Shear Lag and Shear Deformation in Thin-Walled Box Beams
Publication: Journal of Engineering Mechanics
Volume 129, Issue 8
Abstract
This paper presents an initial value solution of the static equilibrium differential equations of thin-walled box beams, considering both shear lag and shear deformation. This solution was used to establish the related finite element stiffness matrix and equivalent nodal forces vector. In the procedure a special shear-lag-induced bimoment is introduced, so that the analysis of shear lag and shear deformation of thin-walled box beams is admitted into the program system of the matrix-displacement method. The present procedure can be used to analyze accurately the shear lag and shear deformation effects for thin-walled box beams, especially for some complex structures (such as continuous box girders and box beams with varying cross section, etc.). The numerical results obtained by the present procedure are consistent with the results of model tests and predictions of the finite shell element method or finite difference approach.
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References
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Copyright © 2003 American Society of Civil Engineers.
History
Received: Mar 12, 2001
Accepted: Jan 24, 2003
Published online: Jul 15, 2003
Published in print: Aug 2003
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