关键词: 梁柱节点, 抗震性能, 有限元分析

Abstract: A precast lap beam-column joint with a corbel and tenon configuration is proposed. A short beam equipped with a small corbel in the lower section was placed on the column surface to create a lap connection with the beam. Accordingly, the beam was designed with a section-reduced tenon in the upper section at the end of the lap connection. Mechanical sleeves were used to connect the reinforcement rebar between the beam and joint. To verify the bearing capacity and seismic performance of the proposed frame joint, quasi-static tests were performed on two 1/2-scaled frame joint specimens that were produced with a normal reinforcement concrete（RC） frame configuration and a special corbel-tenon configuration. The results showed that the failure of the corbeltenon specimen mainly occurred in the connection region and that its bearing capacity and energy dissipation capacity were better than those of the RC specimen, whereas its ductility was lower. Based on the experimental results, a finite element analysis was performed,and it achieved good agreement with the experimental results. Finally, a finite element parameter analysis of the lap beam-column joint with corbel and tenon configurations was performed. The analysis results show that the corbel size, corbel stirrup diameter, and column longitudinal reinforcement diameter have no significant effect on the hysteresis or skeleton curves of the joint. The bearing capacity of the joint decreases with a decrease in the diameter of the longitudinal reinforcement of the corbel, and the bearing capacity and initial stiffness of the joint increase significantly with an increase in the diameter of the beam longitudinal reinforcement.

Key words: beam-column joint, seismic performance, finite element analysis