Modeling Reinforced Concrete Structures Using Smooth Plasticity and Damage Models
Publication: Journal of Structural Engineering
Volume 142, Issue 2
Abstract
In this work, a new smooth model for uniaxial concrete behavior that combines plasticity and damage considerations, together with unsymmetrical hysteresis for tension compression and nonlinear unloading, is presented. Softening and stiffness degradation phenomena are handled through a scalar damage-driving variable, which is a function of total strain. Smoothening of the incremental damage behavior is achieved, following similar steps as for Bouc-Wen modeling of classical plasticity, thus exploiting their common mathematical structure. The uniaxial model for concrete, together with the standard steel model exhibiting kinematic hardening, are employed to derive a fiber beam-column element that is used to assemble the numerical model of frame structures. Following the displacement-based approach, the solution of the entire system is established using a standard Newton-Raphson numerical scheme, which incorporates the evolution equations of all fibers elevated at the section, element, and structural level in the inner loop. Numerical results that compare well with existing experimental data are presented, demonstrating the accuracy and efficacy of the proposed formulation.
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Published In
Journal of Structural Engineering
Volume 142 • Issue 2 • February 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Oct 11, 2014
Accepted: Jun 2, 2015
Published online: Jul 20, 2015
Discussion open until: Dec 20, 2015
Published in print: Feb 1, 2016
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