【摘要】 为了确定T形柱在轴心受压下约束混凝土的强度和变形特性,通过轴心受压试验,建立了约束混凝土的应力-应变曲线,提出了T形柱约束混凝土的峰值强度和峰值应变相对增大值与配箍特征值的关系表达式,并对T形柱约束混凝土的应力-应变曲线下降段进行研究,建立了约束混凝土应变延性系数和混凝土的配箍特征值变化关系式。研究结果为T形柱的结构设计和变形计算提供参考。更多还原

【Abstract】 To determine the strength and deformation features under axial loads,13 specimens of T-shaped columns with confined concrete were designed according to the application of different stirrup ratios.Based on the experiments,the stress-strain curves were developed.An equation of the relationship between peak stresses, the relative increase of peak strain and the stirrup ratios was proposed.The decreasing slopes of stress-strain curves were also analyzed to develop the equation of the relationship between ductility coefficient and stirrup ratios of confined concrete.The research can be used as reference for structural design and deformation calculation.更多还原