2023 Volume 79 Issue 13 Article ID: 22-13042
This study aims to improve the recovery performance of bridge columns after being damaged due to an earthquake and also proposes a PC column structure that reduces residual displacement by prestressing. This proposed column enables a quick repair of the damaged column by arranging a steel tube in the core of the cross section. The seismic performance and recovery performance of the proposed column were verified by conducting cyclic loading tests. The test results showed that the residual displacement was not reduced enough to improve the recovery performance. After the damage of the column due to cyclic loadings, almost no damage, such as fracture or buckling, was found in the steel tube, which means that the core of the cross-section can support the structure above. Therefore, the proposed structure can quickly be repaired after being damaged if the residual displacement can be reduced. The analysis using Takeda model simulated the experimental results reasonably well. However, there needs some improvement in the analysis for PC columns because the Takeda Model cannot consider the increase of axial force in prestressed tendon with the increase of the column deformation.
