| Title |
Analyzing Energy Dissipation Coefficient Changes in Each Hysteresis Step of Coupling Beams |
| DOI |
https://doi.org/10.5659/JAIK.2023.39.11.227 |
| Keywords |
energy dissipation coefficient; coupling beam; nonlinear time history analysis; hysteretic behavior |
| Abstract |
Reinforced concrete members undergo energy dissipation as they experience pinching and a reduction in both stiffness and strength during
hysteretic behavior. Thus, it is crucial to adequately account for the hysteretic behavior characteristics of materials and members in nonlinear
time history analysis. The energy dissipation coefficient, which measures how energy is lost during cyclic behavior, is expected to decrease
as the behavior progresses. However, current guidelines referred to as AIK-B-2021-001 suggest a single energy dissipation factor for each
member. In this study, changes were observed in the energy dissipation coefficient of coupling beams based on existing experimental results
and nonlinear time history analysis using the Shear Hinge Displacement Type element of Perform 3D. A model was established for the
hysteretic behavior to determine the idealized elastoplastic energy. In conclusion, it was found that the energy dissipation coefficient decreased
as the hysteretic behavior advanced, and this change was quantified. |