Cyclic Behavior Regularization Force-based Elements Plastic Hinge Integration Slender Reinforced Concrete Columns Concrete Stress-strain Softening Behavior

External authors:

• Juan D. Pozo ( Pontificia Universidad Catolica de Chile , University of Notre Dame )
• Yahya Kurama ( University of Notre Dame )

Abstract:

Force-based elements with plastic hinge integration are often used to simulate the nonlinear behavior of reinforced concrete (RC) columns experiencing softening behavior. The response from these models can be highly sensitive to the assumed plastic hinge length, L-p. The objective of this paper is to evaluate the accuracy and sensitivity of the global and local behaviors of RC columns to the assumed L-p. The evaluation is conducted using unregularized and regularized material stress-strain relationships. Additionally, a regularized confined concrete crushing energy equation is proposed to increase the accuracy of the numerical results and reduce their sensitivity to the assumed L-p.