논문 상세보기
pp.15-26
Pinching is an important property of reinforced concrete member which characterizes its cyclic behavior. In the present study, numerical studies were performed to investigate the characteristics and mechanisms of pinching behavior and the energy dissipation capacity of flexure-dominated reinforced concrete members. By analyzing existing experimental studies and numerical results, it was found that energy dissipation capacity of a member is directly related to the energy dissipated by re-bars that are plastic material rather than concrete that is brittle, and that it is not related to magnitude ofaxial compressive force applied to the member. Therefore, for a member with specific 없Tangement and amount of re-bars, the energy dissipation capacity remains uniformly regardless of the flexural strength increased by axial force. Pinching that is not related to shear appears due to this phenomenon. The flexural pinching appears conspicuous as the flexural strength increases compared to the uniform energy dissipation capacity. Based on the findings, a practical method for estimating the energy dissipation capacity was developed and verified with existing experiments.
