Micromodeling strategy for reinforced concrete columns: validation against cyclic tests
DOI:
https://doi.org/10.37636/recit.v9n3e474Keywords:
Micromodeling, Reinforced concrete, Hysteretic energyAbstract
Simulating the cyclic behavior of reinforced concrete columns using fiber or lumped plasticity models requires calibrations to capture the effects of confinement, shear, or localized failure modes. This article proposes a micromodeling strategy implemented in OpenSees, characterized by simplified parameterization where the constitutive properties are derived exclusively from the concrete's compressive strength and the steel's yield strength. The concrete is represented by a plastic damage model with fracture energy regularization, while the reinforcing steel incorporates post-yield buckling and cyclic degradation. The methodology was validated against six experimental specimens with axial load ratios between 0.00 and 0.22. The results demonstrate average fit indices of 0.90. The model captured the formation of the plastic hinge and post-peak degradation, confirming that mechanical interaction and confinement emerge naturally from the formulation without the need for predefined damage hypotheses or plastic regions.
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Data Availability Statement
The data that support the findings of this study are available from the corresponding author upon reasonable request.
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