钢管玄武岩纤维混凝土短柱轴心受压承载能力试验研究

钢管混凝土短柱是工程中的常用构件,其核心混凝土的性能对钢管混凝土承载能力有较大影响,为了研究玄武岩纤维混凝土对钢管混凝土受力性能的影响,采用钢管混凝土和钢管玄武岩混凝土短柱轴心受压对比试验,结果发现,在相同条件下,钢管玄武岩纤维混凝土短柱轴心受压承载能力均大于普通钢管混凝土短柱,最大提高率10.1%,承载能力提高率随着钢管混凝土含钢率的提高而降低;相对于钢管混凝土短柱,钢管玄武岩纤维混凝土短柱的弹性阶段较长,延性增加.延性系数随含钢率提高而提高,纤维长度改变对钢管玄武岩纤维混凝土短柱承载力影响较小.

Ultimate Bearing Capacity of Short Basalt Fiber-Reinforced Concrete(BFRC)-Filled Steel Tube Columns under Axial Compression

Short Concrete-filled steel tube(CFST)columns are commonly used in engineering components,the performance of core concrete is important factor influencing the bearing capacity of CFST columns.To study the effect of basalt fiber reinforced concrete(BFRC)on the mechanical properties of CFST, axial compression comparison experiments were conducted on short CFST columns and short BFRC-filled steel tubes.The results show that under the same conditions,the ultimate bearing capacity of short BFRC-filled steel tubes columns are higher than that of short CFST columns, the maximum improved rate is 10.1%.The maximum improved rate of the ultimate bearing capacity increased as well as steel rate decrease; Compared with short CFST columns, the short BFRC-filled steel tubes columns have a longer elasticity, and the ductility coefficients are larger, the ductility coefficients of the short BFRC-filled steel tubes columns increased as well as steel rate increased.The change of basalt fiber length has little effect on the ultimate bearing capacity of the short BFRC-filled steel tubes columns.