연결보의 이력단계별 에너지 소산계수의 변화에 관한 연구

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. © 2023 Architectural Institute of Korea.