L形截面钢纤维高强钢筋混凝土柱及复合柱偏心加载试验

研究钢纤维对L形截面高强钢筋混凝土柱和混凝土复合柱的性能的影响。对16根L形截面钢纤维柱进行试验研究。主要参数为混凝土抗压强度、荷载偏心率、长细比影响以及钢纤维含量。对L形截面钢筋混凝土柱的试验结果进行了讨论。此外,基于材料的非线性特性对试样进行了分析。采用ACI318规范中的弯矩放大法对长细比影响加以考虑。结果表明:高强混凝土中加入钢纤维能够增强L形截面钢筋混凝土柱和复合柱的结构特性,有利于抵抗双向弯曲和轴向加载。

Tests of Eccentrically Loaded L-Shaped Section Steel Fibre High Strength Reinforced Concrete and Composite Columns

Influence of steel fibres on the behaviour of L-shaped high strength reinforced concrete and concrete-encased composite columns is presented. A total of 16 L-shaped plain and steel fibre columns were constructed and tested in this study. The main parameters were the concrete compressive strength, load eccentricity, slenderness effect and steel fibre content. The experimental results of L-shaped reinforced concrete and composite column specimens were discussed in the paper. In addition, the column specimens were analysed based on a theoretical method considering the nonlinear behaviour of the materials. The slenderness effect of the columns has been taken into account by using The Moment Magnification Method suggested by ACI 318 specification. The results show that the inclusion of steel fibres into high strength concrete has considerable effect on structural behaviour of L-shaped both reinforced concrete and composite columns subjected to biaxial bending and axial load.