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为了进一步提高钢管混凝土柱的延性,在常规的钢管混凝土内插入钢筋形成了配筋钢管混凝土。通过轴心受压试验,采用基于性能的比较研究方法,研究配筋对构件整体性能的影响。经过对试验数据的分析发现:配置的钢筋有助于抑制核心混凝土的压碎,改变其破坏模式,使构件的承载力、套箍效应、延性和极限荷载后的塑性变形能力都得以显著提高。由此得出结论,在钢管混凝土内配置钢筋是提高其延性乃至整体性能的有效措施之一。
In order to further improve the ductility of CFST columns, reinforced concrete filled steel tubes are formed by inserting steel bars into the conventional CFST. Through the axial compression test, a performance-based comparative study was conducted to study the effect of reinforcement on the overall performance of the component. After analyzing the experimental data, it is found that the reinforced bars can restrain the crushing of the core concrete and change the failure mode of the core concrete. The load carrying capacity, the ferrule effect, the ductility and the plastic deformation capacity after the ultimate load can all be significantly improved. This concludes that the deployment of steel bars in concrete filled steel tubes is one of the effective measures to improve their ductility and overall performance.