EXPERIMENTAL STUDY ON SINGLE RC COLUMN WITH EMBEDDED DEAD WEIGHT SUPPORT MECHANISM DURING RECOVERY

Abstract

 In order to realize anti-catastrophe of bridge structures, the structural technology to secure human life and improve the recoverability is required. In this study, a RC column with an embedded concrete filled steel tube with dead weight support capacity was proposed, and its performance was evaluated by cyclic loading tests. In the proposed structure, the embedded concrete filled steel tube was placed so that the bottom of the steel tube and the top of the footing were aligned. As a result, it was possible to prevent the tensile force from being transmitted to the embedded concrete filled steel tube and reduce damage to it. It was also found that the proposed structure exhibits restoring force characteristics and ultimate modes similar to those of ordinary RC columns. After the experiment, the longitudinal bars and the concrete surrounding the embedded concrete filled steel tube were removed. From the results, it was confirmed that the acting axial load could be supported only by the remaining concrete filled steel tube.