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为研究圆钢管钢筋混凝土轴压短柱承载力计算方法,以配筋率为变化参数进行了6个圆钢管钢筋混凝土短柱的轴压试验。结果表明,圆钢管钢筋混凝土轴压短柱在峰值荷载之前的荷载-位移曲线呈线性变化,试件的破坏形态呈剪切破坏,由于配筋对混凝土的进一步约束,试件具有较高的承载力和很好的延性。通过试验数据对比,进一步验证了采用叠加法计算圆钢管钢筋混凝土轴压短柱承载力的计算方法是可行的,《实心与空心钢管混凝土结构技术规程》(CECS 254∶2012)和《钢管混凝土结构技术规程》(CECS 28∶2012)的计算结果和试验结果吻合较好。
In order to study the calculation method of the bearing capacity of the short columns with round steel tubular short columns, the axial compression tests of six concrete filled steel tubular short columns with the reinforcement ratio as the changing parameter were carried out. The results show that the load-displacement curves of CFST stub columns before the peak load change linearly, and the failure modes of the specimens show a shear failure. Due to the further restraint of the reinforcement on the concrete, the specimens have a higher load bearing capacity Force and good ductility. Through the comparison of the test data, it is further verified that the method of calculating the bearing capacity of CFST short columns by the superposition method is feasible. The Technical Specification for Concrete Filled Steel Tube and Concrete Structure (CECS 254:2012) and Concrete Filled Steel Tube Technical Regulations "(CECS 28:2012) The calculated results and the test results in good agreement.