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钢骨-钢管混凝土柱是一种新型重载柱。首次进行了考虑支座影响的钢骨-钢管自密实高强混凝土短柱轴压试验,对其力学性能进行了研究。讨论了影响组合柱受力性能的主要因素,包括套箍系数、配骨指标和混凝土强度等,给出了组合柱的承载力计算公式,计算结果与试验结果吻合良好。研究结果表明:由于钢管、钢骨和核心混凝土的协同工作,钢骨-钢管自密实高强混凝土柱具有很高的承载力和很好的延性,可大大提高建筑物的防倒塌能力。
Steel-concrete column is a new type of heavy-duty column. For the first time, the axial compression test of steel-concrete self-compacting high-strength concrete short columns considering the influence of abutment was carried out, and the mechanical properties were studied. The main factors influencing the mechanical behavior of the composite columns are discussed, including the cuff coefficient, the weight of concrete and the strength of concrete. The formulas for calculating the bearing capacity of composite columns are given. The calculated results are in good agreement with the experimental results. The results show that the steel-reinforced concrete self-compacting high-strength concrete columns have high bearing capacity and good ductility due to the cooperation of steel pipe, steel bar and core concrete, which can greatly improve the anti-collapse ability of the building.