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为保证钢筋高强混凝土框架柱满足延性需求,采用偏心受压构件界限破坏理论,根据截面力的平衡和变形协调关系,推导出普通配筋截面柱的轴压比限值计算公式。在此基础上,分析混凝土强度、钢筋强度、配箍率、配筋率、密集纵筋芯柱等因素对轴压比限值的影响,提出能反映上述变化参数作用时的钢筋高强混凝土柱轴压比限值计算方法。研究成果为钢筋高强混凝土柱设计提供了理论依据。
In order to ensure the ductility of reinforced concrete columns with high strength, the limit failure theory of eccentric compression members is adopted. According to the balance of cross-section forces and the coordination of deformation, the formulas for calculating the axial compression ratio of ordinary reinforced section columns are deduced. Based on this, the influences of concrete strength, steel bar strength, stirrup ratio, reinforcement ratio, dense longitudinal stem and other factors on the limit value of axial compression ratio are analyzed. It is proposed that the steel bar of high strength concrete column Compression ratio calculation method. The research results provide a theoretical basis for the design of reinforced high-strength concrete columns.