关键词: 钢管玄武岩纤维混凝土短柱;轴心受压;极限承载力

Abstract: 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.

Key words: short basalt fiber-reinforced concrete(BFRC)-filled steel tube columns;axial compression;ultimate bearing capacity