Performance of CUF Approach to Analyze the Structural Behavior of Slender Bodies
Publication: Journal of Structural Engineering
Volume 138, Issue 2
Abstract
This paper deals with the accurate evaluation of complete three-dimensional (3D) stress fields in beam structures with compact and bridge-like sections. A refined beam finite-element (FE) formulation is employed, which permits any-order expansions for the three displacement components over the section domain by means of the Carrera Unified Formulation (CUF). Classical (Euler-Bernoulli and Timoshenko) beam theories are considered as particular cases. Comparisons with 3D solid FE analyses are provided. End effects caused by the boundary conditions are investigated. Bending and torsional loadings are considered. The proposed formulation has shown its capability of leading to quasi-3D stress fields over the beam domain. Higher-order beam theories are necessary for the case of bridge-like sections. Various theories are also compared in terms of shear correction factors on the basis of definitions found in the open literature. It has been confirmed that different theories could lead to very different values of shear correction factors, the accuracy of which is subordinate to a great extent to the section geometries and loading conditions. However, an accurate evaluation of shear correction factors is obtained by means of the present higher-order theories.
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Acknowledgments
The financial support from the Regione Piemonte project MICROCOST is gratefully acknowledged.
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Published In
Journal of Structural Engineering
Volume 138 • Issue 2 • February 2012
Pages: 285 - 297
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Apr 20, 2010
Accepted: Feb 17, 2011
Published online: Feb 19, 2011
Published in print: Feb 1, 2012
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