Abstract:
The self-centering beam-column joint is an emerging high-performance resilient component. Scholars have conducted numerous experimental and theoretical studies on the working mechanism of self-centering beam-column joint components. Analysis on the seismic resistance and post-earthquake recovery performance of self-centering frames at the structural level has become a research trend. Therefore, this paper proposes a self-centering frictional beam-column joint (SCFJ) and establishes its macro numerical analysis model. Based on the principle of load-carrying capacity equivalence, a series of RC frame structures with SCFJs with different numbers of stories are designed. The influence of the SCFJs on the seismic performance and post-earthquake recovery performance of the RC frame structures is also quantified. The results show that under maximum considered earthquakes, the acceleration and maximum drift ratio responses of the self-centering frames are similar to those of ordinary frames, and the residual deformation of the structure can be reduced by 86% to 95%. Moreover, the collapse resistance is improved by 9% to 25%, and the immediate occupancy performance is improved by 41% to 72%, and the improvement effect increases with the increase of floors.