Finite-Element Modeling to Calculate the Overall Stiffness of Cracked Reinforced Concrete Beams
Publication: Journal of Structural Engineering
Volume 138, Issue 7
Abstract
The macro-finite-element (MFE) modeling proposed in this paper is dedicated to the calculation of the deflection of already cracked reinforced concrete beams under service loading at the stabilized cracking stage. MFEs are beam finite elements, characterized by their average moment of inertia, calculated using nonlinear assumed distributions of steel strain, concrete strain, and neutral axis between two consecutive bending cracks. The results of the MFE model are successfully compared with experiments performed on five RC beams, including square- and T-section beams and two concretes (grades 30 and 40 MPa). A successful application of the MFE method to a statically indeterminate beam is also presented. The MFE modeling is appealing for use in practice because of its computational simplicity.
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Published In
Journal of Structural Engineering
Volume 138 • Issue 7 • July 2012
Pages: 889 - 898
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Jan 13, 2011
Accepted: Oct 14, 2011
Published online: Oct 18, 2011
Published in print: Jul 1, 2012
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