圆钢管钢筋混凝土轴压短柱试验与承载力计算*
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（1 辽宁工程技术大学土木与交通学院， 阜新 123000； 2 辽宁工程技术大学建筑工程学院， 阜新 123000）
［摘要］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。［关键词］钢管钢筋混凝土; 短柱; 轴压试验; 极限承载力; 计算方法中图分类号：TU352.5 文献标识码：A 文章编号：1002-848X(2016)07-0064-04
Axial compression test and bearing capacity calculation of bar-reinforced concrete filled circular steel tubular stub columnZhang Yuzhuo1, Lü Xuetao2, Liu Haiqing2(1 College of Civil Engineering and Transportation, Liaoning Technical University, Fuxin 123000, China; 2 College of Engineering and Architecture， Liaoning Technical University, Fuxin 123000, China)Abstract: To study the calculation method of bearing capacity of bar-reinforced concrete filled circular steel tubular stub column, 6 specimens were designed for the axial compression test considering the variable parameters of reinforced ratio. Test results indicate that load-displacement curve is in linear change and the damage form of specimens is shear failure before the load is reaching the ultimate bearing capacity. Due to the further constraints of the reinforcement to concrete, the specimens have good ultimate bearing capacity and ductility. Comparison with experimental data further verifies that it is feasible to use superposition method for calculating the bearing capacity of bar-reinforced concrete filled circular steel tubular stub column under axial compression loads. The results calculated by Technical specification for solid and hollow concrete filled steel tubular structure (CECS 254∶2012) and Technical specification for concrete-filled steel tubular structures(CECS 28∶2012) are in good agreement with the test results.Keywords: bar-reinforced concrete filled steel tubular（RCFST）; stub column; axial compression test; ultimate bearing capacity; calculation method
*国家自然科学基金资助项目(51208246)，辽宁工程技术大学拔尖人才提升计划资助项目(20130309，SCDY2013009)。作者简介：张玉琢，博士研究生，Email：lxtwww30@sina.com。
