| Title |
Finite Element Analysis Through Model Change Method of Damaged Reinforced Concrete Beams With Externally Post-tensioning Steel Rods |
| DOI |
https://doi.org/10.5659/JAIK.2023.39.4.231 |
| Keywords |
Reinforced Concrete (RC); Post-tensioning; Concrete Damaged Plasticity (CDP); Model Change; Restart; Finite Element Analysis |
| Abstract |
Several important options for modeling damaged post-tensioned reinforced concrete (RC) beams and reproducing a concrete’s behavior via
ABAQUS software was presented in this study. The first thing considered was a material model suitable for concrete, including compressive
and tensile behavior, stress-strain relationship, and concrete damaged plasticity (CDP). The CDP model required concrete tensile cracking and
compressive crushing damage parameters and additional variables such as dilation angle ( ), plastic potential eccentricity (), the ratio of the
bi-axial compressive strength to uni-axial compressive strength (???? ), the ratio of the second stress invariant on the tensile meridian to
that on the compressive meridian ( ), and viscosity parameter (). The second item was geometry related to concrete, reinforcements, and
post-tensioning system while the third item involved the algorithms for model change and restart to apply the post-tensioning steel rod. The
validity of the applied model was confirmed through the experimental results of the post-tensioned RC beams under a three-point bending
moment. |