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首页> 外文期刊>Magazine of Concrete Research >L-shaped concrete-filled steel hollow-section columns under diagonal cyclic loading
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L-shaped concrete-filled steel hollow-section columns under diagonal cyclic loading

机译：L形混凝土填充钢空心柱下对角线循环载荷

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摘要

L-shaped concrete-filled steel hollow-section (CFSHS) columns have the potential to be widely used as corner columns, and have the advantage of creating larger usable areas in buildings. However, few experimental tests of this kind of column under diagonal cyclic loading have been reported. Tests on eight L-shaped CFSHS columns with equal legs were conducted to study their hysteretic behaviour; the test variables were: loading angle, concrete compressive strength, axial load level and presence or absence of stiffeners. The failure process and modes, stiffness degradation, ductility and energy dissipation were observed, and lateral load-displacement hysteretic curves and envelope curves were plotted. The results show that L-shaped CFSHS columns have generally good hysteretic behaviour and that the displacement ductility coefficients are in excess of 3 in most cases. Columns with a loading angle of 45 degrees have 10% decrease in ultimate strength but a slightly higher ductility than columns with a loading angle of 0 degrees. The ultimate strength, ductility and energy dissipation of columns all decrease with increasing axial load levels. Discontinuously welded stiffeners can improve the ultimate strength and ductility, but the amplitude is limited. Finally, a finite-element model was developed; the predicted results agree well with the test results.
机译：L形混凝土填充钢空心部分（CFSHS）柱具有广泛用作拐角柱的潜力，并具有在建筑物中创造更大的可用区域的优点。然而，已经报道了在对角循环载荷下这种柱的很少的实验试验。进行八个L形CFSHS柱的测试，以研究其滞后行为;测试变量是：装载角度，混凝土抗压强度，轴向载荷水平和存在或不存在加强件。观察失败过程和模式，刚度降解，延展性和能量耗散，绘制横向载荷 - 位移滞回曲线和包络曲线。结果表明，L形CFSHS柱具有通常具有良好的滞后行为，并且在大多数情况下，位移延展性系数超过3。装载角度为45度的柱具有＆极限强度减小10％，但延伸略高于具有0度的装载角度的柱。柱子的极限强度，延展性和能量耗散随着轴向载荷水平的增加而降低。不连续焊接加强筋可以提高极限强度和延展性，但振幅有限。最后，开发了有限元模型;预测结果与测试结果很好。

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  • 来源
    《Magazine of Concrete Research》 |2021年第12期|541-554|共14页
  • 作者

    Zheng Yong-Qian; Ma Ya-Jie; Lai Peng-Song; Zhang Xue-Li; Ye Jian-Feng;

  • 作者单位

    Fujian Univ Technol Fujian Prov Key Lab Adv Technol & Informatizat Ci Fuzhou Fujian Peoples R China;

    Fujian Univ Technol Fujian Prov Key Lab Adv Technol & Informatizat Ci Fuzhou Fujian Peoples R China;

    Fujian Univ Technol Fujian Prov Key Lab Adv Technol & Informatizat Ci Fuzhou Fujian Peoples R China;

    Fujian Univ Technol Fujian Prov Key Lab Adv Technol & Informatizat Ci Fuzhou Fujian Peoples R China;

    Fujian Univ Technol Fujian Prov Key Lab Adv Technol & Informatizat Ci Fuzhou Fujian Peoples R China;

  • 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

    finite element methods; loads loading; testing, apparatus methods;

    机译：有限元方法;负载和装载;测试;装置和方法;

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