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为了全面研究钢-混凝土组合框架结构动力性能,对单层单跨的钢管混凝土柱和组合梁组成的组合框架进行动力性能参数分析.讨论了钢管混凝土柱含钢率、柱长细比、柱轴压比及钢-混凝土组合梁剪力连接度对固有频率和地震响应的影响.分析表明,固有频率随含钢率的增加和梁柱线刚度比的增大而增大,随柱长细比的增大而减小,组合梁剪力连接度对组合框架固有频率无明显影响.位移响应随柱含钢率的增大而减小,随柱长细比的增大而增大,随梁柱线刚度比减小而增大.而轴压比对组合框架地震响应峰值影响较小,剪力连接度大于0.73时,对组合框架位移响应的影响并不明显.根据参数分析结果,得出各参数对钢-混凝土组合框架动力性能的影响规律,并提出相应的设计建议,以期为工程实践提供参考.
In order to comprehensively study the dynamic performance of steel-concrete composite frame structure, the dynamic performance parameters of the composite frame composed of single-span single-span CFST columns and composite beams are analyzed.Calculation of steel-concrete-filled steel column ratio, Pressure ratio and shear connection of steel-concrete composite beam on natural frequency and seismic response are analyzed.The results show that the natural frequency increases with the increase of steel content and the stiffness ratio of beam and column, But the shear connection degree of the composite beam has no obvious influence on the natural frequency of the composite frame.The displacement response decreases with the increase of the steel content in the composite column and increases with the increase of the slenderness ratio of the composite beam, The stiffness ratio of the column increases and the axial compression ratio has less influence on the peak value of the seismic response of the composite frame.The shear connection degree of greater than 0.73 has no obvious effect on the displacement response of the composite frame.According to the results of parameter analysis, The influence of each parameter on the dynamic performance of the steel-concrete composite frame, and the corresponding design suggestions are put forward in order to provide reference for engineering practice.