To study the impact of axial compression ratio on the seismic performance of concrete columns with T-shaped steel circular steel tubes,ABAQUS finite element analysis software was used to model and analyze 5 specimens from existing literature.The reliability of the model was verified through indicators such as hysteresis curve and ultimate bearing capacity.Based on the verified model,expansion analysis of different axial compression ratios was conducted.The results show that the hysteresis curve of the finite ele-ment method is basically consistent,and the error of ultimate bearing capacity and ductility is within 9％,slightly greater than the experimental results.The simulated concrete damage cloud map has column foot crushing damage,horizontal cracks along the length direction of the specimen,and plastic hinges at about 1/3 of the column height that are consistent with the experimental results;Stress analysis and mechanism analysis indicate that longitudinal reinforcement and compression/tension side T-shaped steel have signifi-cant constraints on the core concrete,while internal steel ribs mainly provide lateral stiffness;As the axial compression ratio increases,the specimen undergoes a transition from flexural failure to compressive shear failure,with a maximum degradation of 8.6％in shear capacity and 63.5％in ductility.
关键词
T型钢-钢管/混凝土柱/轴压比/抗震性能/有限元分析
Key words
T-shaped steel-steel tube/concrete columns/axial compression ratio/seismic per-formance/finite element analysis
维普
万方数据