Seismic Performance Study of Self-Centering Steel Reinforced Concrete Building Joints Under High-Intensity Earthquake

Abstract

The better the seismic performance of building joints, the more lives and property can be preserved in earthquake disasters. This paper briefly introduced the basic structure of self-centering reinforced concrete (RC) column-steel beam joints and then prepared three types of joint specimens. Specimen 1 was a self-centering RC column-steel beam joint, specimen 2 was obtained by removing the damping core plate based on specimen 1, and specimen 3 was obtained by removing both the damping core plate and prestressed reinforcement based on specimen 1. The quasi-static loading tests were carried out on the three types of joint specimens, followed by vibration tests with an eight-degree earthquake on a vibration table. The findings demonstrated that specimen 1 had a higher peak load and ultimate displacement when the quasi-static loading displacement was greater than the yield displacement; specimen 1 had higher energy dissipation capacity when facing periodic loading; when facing an eight-degree earthquake, specimen 1 had the best self-centering ability.