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为研究工字形截面型钢混凝土短柱的受压性能,设计了5个1/20缩尺工字形截面型钢混凝土短柱试件,各试件几何尺寸、配筋、配钢均相同,进行了不同偏心距、不同加载方向工况下的轴压、偏压单调加载试验。通过试验,分析了各试件的破坏特征、承载力、刚度及退化过程等。对比分析了偏心距、加载方向对工字形截面型钢混凝土短柱受压性能的影响规律。基于试验,进行了工字形截面型钢混凝土短柱受压承载力计算,计算结果与试验结果符合较好。研究表明:工字形截面型钢混凝土短柱具有良好的弹塑性变形能力和较高的承载力;随着偏心距的增大,工字形截面型钢混凝土短柱的承载力逐渐降低,弹塑性最大位移逐渐增大,延性逐渐增强,刚度退化逐渐减慢;偏心距相近时,与沿翼缘方向偏心加载的试件相比,沿工字形截面腹板方向加载的试件屈服荷载、极限荷载较高,延性性能较好。
In order to study the compressive properties of I-shaped SRC columns, five 1/20-inch I-section SRC columns were designed, and the geometrical dimensions, reinforcement and steel distribution of the specimens were the same and different Eccentricity, axial load under different loading conditions, bias monotonic loading test. Through the test, the failure characteristics, bearing capacity, stiffness and degradation process of each specimen were analyzed. The influence of eccentricity and loading direction on the compression behavior of I-shaped SRC columns was analyzed. Based on the test, the compressive bearing capacity of I-shaped SRC stub columns is calculated. The calculated results are in good agreement with the experimental results. The results show that the I-shaped SRC columns have good elastic-plastic deformation capacity and high bearing capacity. As the eccentricity increases, the bearing capacity of I-shaped SRC columns decreases gradually and the maximum displacement of the elastic-plastic section gradually increases When the eccentricity is close to the eccentric load, the yield load and the ultimate load of the specimens loaded along the cross-section of the I-shaped cross-section are higher than that of the specimens loaded eccentrically along the flange, Ductility performance is better.