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地震作用下纵筋屈曲的研究进展

李晰 杨昊

李晰, 杨昊. 地震作用下纵筋屈曲的研究进展[J]. 西南交通大学学报, 2024, 59(5): 1043-1057. doi: 10.3969/j.issn.0258-2724.20220549
引用本文: 李晰, 杨昊. 地震作用下纵筋屈曲的研究进展[J]. 西南交通大学学报, 2024, 59(5): 1043-1057. doi: 10.3969/j.issn.0258-2724.20220549
LI Xi, YANG Hao. Research Progress on Buckling of Longitudinal Reinforcement Under Earthquake[J]. Journal of Southwest Jiaotong University, 2024, 59(5): 1043-1057. doi: 10.3969/j.issn.0258-2724.20220549
Citation: LI Xi, YANG Hao. Research Progress on Buckling of Longitudinal Reinforcement Under Earthquake[J]. Journal of Southwest Jiaotong University, 2024, 59(5): 1043-1057. doi: 10.3969/j.issn.0258-2724.20220549

地震作用下纵筋屈曲的研究进展

doi: 10.3969/j.issn.0258-2724.20220549
基金项目: 国家自然科学基金项目(51508473);山东省自然科学基金项目(ZR2021ME094)
详细信息
    作者简介:

    李晰(1984—),男,副教授,研究方向为桥梁抗震,E-mail:xi.li@qut.edu.cn

  • 中图分类号: TU375.3

Research Progress on Buckling of Longitudinal Reinforcement Under Earthquake

  • 摘要:

    在地震作用下,钢筋混凝土结构中的墩柱在承受竖向力的同时,通常还会受到往复荷载作用下的水平力,若结构中横向约束不足,纵筋可能会发生明显的横向变形,使得结构承载力和延性显著降低,修复困难. 因此,研究纵筋在受压时的屈曲机理对结构设计以及施工都有着重要的指导意义. 鉴于此,对基于单根钢筋直压试验的纵筋屈曲研究进行总结,分析得出钢筋屈曲的主要影响因素是长细比和屈服强度;概括总结基于RC (reinforced concrete)短柱直压试验的纵筋屈曲问题的研究进展,阐述在复杂相互作用下纵筋屈曲可能受到的各种影响因素;结合土木发展现状,对使用新材料/新构造的墩柱中的纵筋屈曲研究进行讨论. 现阶段对纵筋屈曲的研究中没有给出判断钢筋屈曲方向和范围的理论方法,对纵筋的整体屈曲以及新型结构中的纵筋屈曲问题仍有待进一步研究,且应在后续研究中综合考虑锈蚀、加载历程、截面形式以及各材料相互作用等因素对纵筋屈曲的影响.

     

  • 图 1  长细比对平均响应的影响

    Figure 1.  Effect of slenderness ratio on average response

    图 2  屈服强度对平均响应的影响

    Figure 2.  Effect of yield strength on average response

    图 3  Bae等[9]的试验分析结果

    Figure 3.  Experimental and analysis results of Bae et al[9].

    图 4  未锈蚀与锈蚀钢筋的屈曲机理[15]

    Figure 4.  Buckling mechanism of uncorroded and corroded reinforcements [15]

    图 5  Montil-Nuti模型

    Figure 5.  Montil-Nuti model

    图 6  Dhakal-Maekawa模型

    Figure 6.  Dhakal-Maekawa model

    图 7  RC柱中的纵筋屈曲类型

    Figure 7.  Types of longitudinal reinforcement buckling in RC columns

    图 8  G-A本构模型

    Figure 8.  G-A constitutive model

    图 9  修正的G-A模型

    Figure 9.  Modified G-A model

    图 10  屈曲约束套管

    Figure 10.  Buckling-restrained casing

    图 11  屈曲约束套管[62]

    Figure 11.  Buckling-restrained casing proposed[62]

    表  1  参数$\; \beta $的选取

    Table  1.   Selection of parameter $\;\beta$

    条件 $ L / D \leqslant 5 $ $ 5<L / D \leqslant 10 $ $ L / D>10 $
    取值 0.0050 0.0065 0.0125
    下载: 导出CSV

    表  2  各国规范对比

    Table  2.   Comparison of norms among different countries

    规定 箍筋
    最小数量
    箍筋间距 构造措施
    欧洲规范
    EN 1998
    新西兰规范
    NZS 3101
    美国规范
    ACI 318—05
    我国规范
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-08-07
  • 修回日期:  2023-01-08
  • 网络出版日期:  2024-07-12
  • 刊出日期:  2023-03-29

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