底部加强双钢板混凝土组合剪力墙抗震性能研究

为研究底部加强双钢板混凝土组合剪力墙的抗震性能，以型钢数量（m=2、4、6）、型钢尺寸（I）、型钢强度（Q235、Q345）（f_p）、钢板强度（Q235、Q345）（f_s）、轴压比（n=0.4、0.5、0.7）为主要参数。设计了9片双钢板混凝土组合剪力墙，利用ABAQUS软件建立其有限元模型，并对类似双钢板混凝土组合剪力墙开展验证分析，将仿真结果与试验结果进行对比分析，验证结果的合理性。基于验证结果，开展了9片双钢板混凝土组合剪力墙的参数分析，研究不同参数对底部加强双钢板混凝土组合剪力墙抗震性能影响规律。研究结果表明，底部加强试件在承载能力、延性、塑性变性能力、刚度退化和耗能能力方面均有所提升。轴压比为0.4和0.5时，延性接近；轴压比为0.7时，延性下降；轴压比为0.5时，随着型钢数量的增加，承载能力逐渐提高；提高钢板和型钢强度，延性、初始刚度和耗能能力均有较大提升，抗震性能较优。

Study on Seismic Resistance of Double Steel Concrete at the Bottom

In order to strengthen the seismic performance of double steel concrete combined shear wall, the number of the type steel (m=2,4,6), type steel size (I), type steel strength (Q235, Q345) (f_p), steel plate strength (Q235, Q345) (f_s), axial pressure ratio (n=0.4,0.5,0.7) were utilized as the main parameters. Nine double steel concrete combined shear walls were designed and its finite element model was established using ABAQUS software and validated with similar double steel concrete combined shear walls. The numerical results were compared with the test results o verify the rationality of the finite element model. Based on the verification results, the parameter analysis of 9 double steel concrete combined shear walls were conducted to study the main parameters affecting the seismic performance of reinforced double steel concrete. The results show that the bottom strengthening test piece has been improved in the load-carrying capacity, ductility, plastic degeneration capacity, stiffness degradation and energy consumption capacity. When the axial pressure ratios are 0.4 and 0.5, the ductility is close, whereas the ductility decreases when the axial pressure ratio reaches 0.7; When the axial pressure ratio is 0.5, the load-carrying capacity gradually increases with the increase of the number of the type steel. Increasing the strengths of the steel plate and type steel can significantly increase the ductility, initial stiffness and energy consumption and improve the seismic performance.