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冷成型钢开口截面短柱高温后力学性能试验研究

张佳慧 葛祖静

张佳慧, 葛祖静. 冷成型钢开口截面短柱高温后力学性能试验研究[J]. 工业建筑, 2021, 51(5): 99-107. doi: 10.13204/j.gyjzG20030706
引用本文: 张佳慧, 葛祖静. 冷成型钢开口截面短柱高温后力学性能试验研究[J]. 工业建筑, 2021, 51(5): 99-107. doi: 10.13204/j.gyjzG20030706
ZHANG Jiahui, GE Zujing. EXPERIMENTAL RESEARCH ON MECHANICAL PROPERTIES OF COLD-FORMED STEEL STUB COLUMNS WITH OPEN SECTIONS AFTER A FIRE[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(5): 99-107. doi: 10.13204/j.gyjzG20030706
Citation: ZHANG Jiahui, GE Zujing. EXPERIMENTAL RESEARCH ON MECHANICAL PROPERTIES OF COLD-FORMED STEEL STUB COLUMNS WITH OPEN SECTIONS AFTER A FIRE[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(5): 99-107. doi: 10.13204/j.gyjzG20030706

冷成型钢开口截面短柱高温后力学性能试验研究

doi: 10.13204/j.gyjzG20030706
基金项目: 

国家自然科学基金资助项目(51508328)。

详细信息
    作者简介:

    张佳慧,男,1981年出生,讲师。电子信箱:zhangjh316@163.com

EXPERIMENTAL RESEARCH ON MECHANICAL PROPERTIES OF COLD-FORMED STEEL STUB COLUMNS WITH OPEN SECTIONS AFTER A FIRE

  • 摘要: 为了研究冷成型钢轴压构件的高温后力学行为,对45根开口截面短柱加热至预定温度,冷却后再进行轴压测试。试验设定7种加热温度和两种保温时间,探究温度场参数与构件承载力之间的关系。考察不同加劲模式下,三种开口截面构件的抗火性能和局部稳定性。试验结果表明:1)加热温度和保温时间均可显著影响构件承载力;2)不可把构件承载力的下降简单等同于材性的衰减;3)纵向加劲可以改善开口截面构件的局部稳定性,且腹板加劲的作用更明显。同时利用试验结果评估直接强度法的适用性,可以发现:承载力计算时,对经历温度在700℃以上的试件必须考虑温度引起的构件质量损失;考虑高温效应的修正直接强度法能够提供比较精确和可靠的开口截面高温后承载力计算值。
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出版历程
  • 收稿日期:  2020-03-07
  • 网络出版日期:  2021-09-16
  • 刊出日期:  2021-09-16

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