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Axial capacity of steel tube-reinforced concrete stub columns

机译：钢管混凝土短柱的轴向承载力

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摘要

The steel tube-reinforced concrete (ST-RC) column is an innovative composite structure that has been increasingly applied in high-rise buildings and bridge piers in China. This study aims to investigate the axial capacity of the ST-RC stub column by means of a modified superposition method. Primarily, the sectional confining force equilibrium was elaborated to explain the confinement mechanism of the ST-RC column under concentric compression, which involves the confining stress induced from the inner steel tube and secondary confining stress induced from the peripheral steel hoops. Thereafter, a modified method for predicting the axial capacity of the ST-RC column, considering the secondary confinement, was developed according to a stress and strain analysis. Thirdly, 41 published specimens were collected to verify the accuracy of the proposed method. It was demonstrated that the current method fitted strongly with the tests results and exhibited satisfactory adaptability. Finally, four other methods according to ACI 318, AIJ, EC 4, and CECS 188-2005 were verified in the same scenario. It was found that the current method exhibited superior correlation with the experimental results compared with conventional approaches. It will be favorable to obtain the viable axial capacity of the ST-RC column by using the presented solution.
机译：钢管混凝土（ST-RC）柱是一种创新的复合结构，已在中国的高层建筑和桥墩中得到越来越多的应用。本研究旨在通过改进的叠加方法研究ST-RC短管柱的轴向承载力。首先，详细解释了截面约束力的平衡，以解释ST-RC柱在同心压缩下的约束机理，该机理包括内钢管引起的约束应力和外围钢箍引起的次级约束应力。此后，根据应力和应变分析，开发了一种考虑到次约束的预测ST-RC柱轴向承载力的改进方法。第三，收集了41个公开标本，以验证该方法的准确性。结果表明，目前的方法与测试结果非常吻合，适应性令人满意。最后，在同一场景中验证了根据ACI 318，AIJ，EC 4和CECS 188-2005的其他四种方法。结果发现，与传统方法相比，当前方法与实验结果具有更好的相关性。通过使用提出的解决方案，获得ST-RC柱的可行的轴向容量将是有利的。

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  • 来源
    《Engineering Structures》 |2019年第15期|523-532|共10页
  • 作者

    Hong Huan-Peng; Yuan Huang; Deng Lu; Bai Yu;

  • 作者单位

    Hunan Univ, Coll Civil Engn, Key Lab Damage Diag Engn Struct Hunan Prov, Changsha 410082, Hunan, Peoples R China;

    Hunan Univ, Coll Civil Engn, Key Lab Damage Diag Engn Struct Hunan Prov, Changsha 410082, Hunan, Peoples R China;

    Hunan Univ, Coll Civil Engn, Key Lab Damage Diag Engn Struct Hunan Prov, Changsha 410082, Hunan, Peoples R China;

    Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Steel tube-reinforced concrete columns; Axial capacity; Stress and strain analysis; Lateral confinement;

    机译：钢管混凝土柱;轴向承载力;应力和应变分析;水平约束;

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