Mixed Formulation of Inelastic Composite Shear Beam Element
Publication: Journal of Structural Engineering
Volume 146, Issue 10
Abstract
This study presents a new beam element formulation following a Hellinger-Reissner functional for composite members considering coupling between bond-slip and shear deformations. A robust state determination along with new stability criteria for the mixed-based formulation are proposed. The constitutive laws of the concrete, steel, and shear connectors are used to derive the inelastic coupled axial–flexural–shear interaction of the composite element. To consider shear deformations, Timoshenko beam theory has been adopted in deriving the section kinematics equations. The J2 plasticity following a radial return mapping algorithm and a fixed crack smeared softened membrane model are used to simulate the multiaxial stress state in steel and concrete, respectively. The accuracy and efficiency of the mixed-based formulation was evaluated by comparing the responses at local and global levels with the displacement-based formulation.
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Acknowledgments
The first author is grateful to the University Doctoral Studentship awarded by City, University of London and is very honored to be the recipient of this prestigious scholarship.
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Published In
Journal of Structural Engineering
Volume 146 • Issue 10 • October 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Apr 5, 2019
Accepted: Nov 15, 2019
Published online: Jul 31, 2020
Published in print: Oct 1, 2020
Discussion open until: Dec 31, 2020
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