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为了研究钢纤维对钢管高强混凝土短柱轴压力学性能的影响,对7根钢管钢纤维高强混凝土短柱和3根钢管高强混凝土短柱进行了轴心受压试验。根据试验中测得的钢管横向应变和纵向应变结果,采用内力分解法分析了钢管与钢纤维高强混凝土的应力变化以及两者之间的相互关系。结果表明:钢纤维对钢管高强混凝土短柱的横向变形影响较大,掺入钢纤维能有效提高核心混凝土的抗压强度提高系数,进而提高钢管钢纤维高强混凝土短柱的极限承载力。
In order to study the influence of steel fiber on the axial compressive properties of SRC stub columns, axial compressive tests were carried out on seven columns of SRC stub columns and three columns of SRC stub columns. According to the results of transverse strain and longitudinal strain of steel tube measured in the experiment, the stress variation of steel tube and steel fiber reinforced high strength concrete is analyzed by internal force decomposition method and the relationship between them. The results show that steel fiber has a great influence on the transverse deformation of high strength concrete filled steel tubular short columns. The incorporation of steel fibers can effectively increase the compressive strength of core concrete and increase the ultimate bearing capacity of steel fiber reinforced high-strength concrete short columns.