GFRP管钢骨高强混凝土组合柱轴心受压试验研究

EXPERIMENTAL RESEARCH OF GFRP TUBE COLUMNS FILLED WITH STEEL-REINFORCED HIGH-STRENGTH CONCRETE SUBJECTED TO AXIAL LOADING

  • 摘要: 通过6根GFRP管钢骨高强混凝土组合柱轴压试验,研究了GFRP管纤维缠绕角度、GFRP管厚度及内置钢骨等对组合柱的受力性能影响。试验结果表明:组合柱承载力随着GFRP管壁纤维缠绕角度的减小而增加,变化幅度相对明显,随着GFRP管壁厚度增加而增加,而GFRP管纤维缠绕角度和管壁厚度变化对内部钢骨受力影响较小。组合柱内部钢骨受混凝土约束,没有发生局部屈曲,钢骨对混凝土也有约束作用,增加了组合柱的变形能力,提高了组合柱的承载能力。根据试验研究与理论分析,建立组合柱轴心受压承载力计算公式,理论计算结果与试验结果吻合良好。

     

    Abstract: This paper presents the experimental research of 6 GFRP tube columns filled with steel-reinforced high-strength concrete subjected to axial loading. The effects of the GFRP tube fiber winding angle, GFRP tube thickness, and the steel of GFRP tube columns filled with steel-reinforced high-strength concrete were included in the scope of this investigation. The test results show that the bearing compressive capacity of composite columns obviously increase with the fiber tangle angle reducing, and increase with the increase of GFRP tube thickness. However, both the fiber winding angle and GFRP tube thickness have less influence on mechanical performance of the steel. The steel is not local yield because of the concrete. Meanwhile, the steel restrain concrete which increase the deformation capacity and bearing compressive capacity of composite columns. The theoretical calculating formula for GFRP tube columns filled with steel-reinforced high-strength concrete subjected to axial load is proposed by the base of the test study and theoretical analysis, and the results agree well with test results.

     

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