ANALYTICAL STUDY ON METABOLISM COLUMN STRUCTURE WITH SELF-CENTERING ONLY DURING RESTORATION PROCESS

Abstract

 In this study, we aim to develop a column that exhibits a self-centering only during restoration process in order to achieve both self-centering mechanism and hysteretic damping. We used the metabolism column structure proposed in the past as a reference. The metabolism column structure consists of a permanent part that always supports the axial force and a changeable part that absorbs energy during an earthquake. Specifically, we proposed a new structure using concrete hinges as the permanent part, which has a self-centering mechanism, and verified its feasibility through numerical analysis. As a result of the numerical analysis, the energy absorption performance of the proposed structure during the earthquake was confirmed by the plasticization of the commutative part. In addition, earthquake response analysis was conducted to generate residual displacement of the proposed structure after the earthquake, and dynamic analysis was conducted to understand the response at the time of the removal of the replaceable part. As a result, the selfcentering mechanism of the permanent part was confirmed.