【摘要】 通过24根钢管高强轻集料混凝土短柱的轴心受压试验,研究了钢管高强轻集料混凝土短柱在轴心压力下的轴力-纵向应变关系、宏观变形特征、破坏机理和破坏模式。试验结果表明:在钢管的约束下高强轻集料混凝土的弹性模量、强度和塑性性能得到了不同程度的改善,且构件的刚度有所提高;紧箍系数是影响钢管高强轻集料混凝土短柱力学性能的主要因素,紧箍系数越高,构件极限承载力提高越明显,延性越好;钢管高强轻集料混凝土短柱轴压极限承载力与同规格钢管普通混凝土基本相当。更多还原

【Abstract】 Based on axially compressive tests of 24 high-strength lightweight aggregate concrete filled steel tube (HSLACFT) stub columns, the axial force-longitudinal strain curves,macroscopical characters of deformation, failure mechanism and failure mode are studied in this paper. The test results demonstrated that the elastic ratio, strength,and plasticity of concrete are improved more or less under the restriction of steel tube, and confining ratio is a significant parameter to the mechanical properties of the HSLACFT stub columns. Furthermore, the ultimate bearing capability of HSLACFT is close to that of the normal concrete filled steel tube.更多还原