文章摘要
钢-混凝土组合框架动力性能参数分析
Parameter analysis of dynamic performances of steel-concrete composite frame
  
DOI:
中文关键词: 钢-混凝土组合框架  动力性能  固有频率  位移响应
英文关键词: steel-concrete composite frame  dynamic performance  natural frequency  displacement response
基金项目:
作者单位
戚菁菁, 武霞,谢献忠[ 湖南科技大学 土木工程学院湖南 湘潭 411201 
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中文摘要:
      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.
英文摘要:
      In order to comprehensively study the dynamic properties of steel-concrete composite frame structures, the parameter analysis on dynamic performances of single layer and single span composite frame, which consists of steel pipe concrete columns and composite beams, was conducted. The influences of steel ratio, slenderness ratio, linear stiffness ratio, axial compression ratio and shear connection degree on natural frequency and seismic responses of steel -concrete composite frame were discussed. The results show that the natural frequency increases with the increase of steel ratio and linear stiffness ratio. However, natural frequency decreases with the increase of column slenderness ratio. The shear connection degree of composite beams exerts unclear effect on the natural frequency. Seismic response decreases with the increase of column’s steel ratio, but increases with the increase of the slenderness ratio and the decrease of the linear stiffness ratio. And axial compression ratio has little influence on the peak value of composite frame’s seismic response. When the degree of shear connection is greater than 0.73, it has no obvious effect on seismic response. According to parameter analysis results, the influence laws of all parameters are obtained. Thus, the rational design scopes of all parameters are provided in order to give a reference for practical engineering.
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