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本文是在研究离心螺筋管砼轴压短柱静、动载作用下受力性能的基础上,在管壁砼内掺入少量钢纤维,经离心成型,制成局部钢纤维增强砼薄管,运至现场再浇砼芯,组成离心螺筋钢纤维管砼短柱,意在充分发挥螺筋横向约束效应的同时,又能充分发挥钢纤维增强砼的优点。试验表明:该组合短柱具有更高的承载力,笔者提出了静载力计算公式和计算侧压系数的计算公式;该柱具有塑性破坏特性,笔者分析了其破坏机理;该柱是新型的组合短柱,值得进一步推广应用,尤其适于抗冲击、抗腐蚀、抗冲刷和抗爆等结构。
This paper is based on the study of the centrifugal and dynamic load performance of the centrifugal coil pipe stub column under static and dynamic loading. A small amount of steel fiber is mixed in the wall of the pipe and the steel fiber reinforced reinforced concrete pipe is made by centrifugal molding. , It is transported to the site and then poured into the core to form a short steel cylinder with a spiral steel fiber tube, which is intended to give full play to the lateral restraint effect of the spiral reinforcement, and at the same time, it can give full play to the advantages of steel fiber reinforced concrete. The experiment shows that the composite short column has higher bearing capacity. The author puts forward the calculation formula of the static load and the formula for calculating the lateral pressure coefficient. The column has plastic damage characteristics, and the author analyzes the failure mechanism. The column is a new type. The combined short column is worth further promotion and application, and is particularly suitable for structures such as impact resistance, corrosion resistance, erosion resistance and anti-explosion.