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循环荷载下钢管混凝土与钢筋黏结的试验研究

孙阳 徐振扬 宋德威 王翀霄 杨攀

孙阳, 徐振扬, 宋德威, 王翀霄, 杨攀. 循环荷载下钢管混凝土与钢筋黏结的试验研究[J]. 西南交通大学学报, 2023, 58(3): 638-644, 695. doi: 10.3969/j.issn.0258-2724.20210733
引用本文: 孙阳, 徐振扬, 宋德威, 王翀霄, 杨攀. 循环荷载下钢管混凝土与钢筋黏结的试验研究[J]. 西南交通大学学报, 2023, 58(3): 638-644, 695. doi: 10.3969/j.issn.0258-2724.20210733
SUN Yang, XU Zhenyang, SONG Dewei, WANG Chongxiao, YANG Pan. Experimental Study on Bond Characteristics Between Concrete-Filled Steel Tube and Steel Bar Under Cyclic Loading[J]. Journal of Southwest Jiaotong University, 2023, 58(3): 638-644, 695. doi: 10.3969/j.issn.0258-2724.20210733
Citation: SUN Yang, XU Zhenyang, SONG Dewei, WANG Chongxiao, YANG Pan. Experimental Study on Bond Characteristics Between Concrete-Filled Steel Tube and Steel Bar Under Cyclic Loading[J]. Journal of Southwest Jiaotong University, 2023, 58(3): 638-644, 695. doi: 10.3969/j.issn.0258-2724.20210733

循环荷载下钢管混凝土与钢筋黏结的试验研究

doi: 10.3969/j.issn.0258-2724.20210733
基金项目: 国家自然科学基金(41672257);中央高校基本科研业务费资助(B210203068)
详细信息
    作者简介:

    孙阳(1979—),男,副教授,博士,研究方向为材料结构耐久性,E-mail: sunyang_hhu@hhu.edu.cn

  • 中图分类号: TU398.9

Experimental Study on Bond Characteristics Between Concrete-Filled Steel Tube and Steel Bar Under Cyclic Loading

  • 摘要:

    为探究循环荷载下配筋钢管混凝土构件黏结锚固性能,对配筋钢管混凝土试件开展了单调加载和循环加载试验. 通过单调加载试验,对比分析了黏结力与滑移量之间的响应关系;基于单调加载试验结果,对若干配筋钢管混凝土试件在单轴循环荷载作用下的黏结特性进行了试验研究,考虑包括箍筋配置、黏结长度、钢筋直径、加载次数等因素对黏结性能的影响规律,分析了不同试件黏结力的退化机制及其破坏模式. 结果表明:箍筋提高了试件承受循环荷载作用的能力,配筋钢管混凝土试件的黏结力和延性随黏结长度、钢筋直径的增加而增大,配筋钢管混凝土试件中钢筋的黏结力及延性随着前期承受循环荷载的加载次数的增加而降低,配筋钢管混凝土黏结破坏时整个黏结区域相对比较平滑,变形肋印迹不明显.

     

  • 图 1  带肋钢筋几何特性

    Figure 1.  Geometric characteristics of ribbed steel bars

    图 2  试件及横截面

    Figure 2.  Cross sections of test specimen

    图 3  试件加载

    Figure 3.  Loading of specimen

    图 4  单调加载时试件S11、S22与S1、S2滑移量-黏结力曲线

    Figure 4.  Slip distance-bonding force curves of CFST specimens S1, S2 and ordinary reinforced concrete specimens S11 and S22 under monotonic loading

    图 5  S3、S4加载周次-滑移量关系曲线

    Figure 5.  Loading times-slip distance curve of S3 and S4

    图 6  循环加载S5、S6加载周次-滑移量关系曲线

    Figure 6.  Loading times-slip distance curves of S5 and S6

    图 7  循环加载S7、S8加载周次-滑移量关系曲线

    Figure 7.  Loading times-slip distance curves of S7 and S8

    图 8  循环加载S9、S10加载周次-滑移量关系曲线

    Figure 8.  Loading times-slip distance curves of S9 and S10

    图 9  单调加载S9、S10滑移量-黏结力关系曲线

    Figure 9.  Slip distance-bonding force curves of S9 and S10

    图 10  黏结区域破坏

    Figure 10.  Bonding zone failure

    图 11  循环荷载作用下试件黏结性能退化机制

    Figure 11.  Mechanism of bond degradation of specimens under cyclic loading

    表  1  钢筋几何和力学特性

    Table  1.   Geometric and mechanical properties of steel bars

    钢筋类型d/mmhr/mmlr/mmcr/mmα/(°)屈服强度/MPa抗拉强度/MPa弹性模量/GPa
    带肋钢筋 A161.415.49.557.2335455210
    带肋钢筋 B221.821.210.556.9335455210
    光圆钢筋(箍筋)6300420200
    下载: 导出CSV

    表  2  试验方案与参数

    Table  2.   Test plan and parameters

    加载方式试验
    目标
    试件编号试件类型d/
    mm
    l/mm是否配置箍筋加载周次加载过程
    单调加载滑移量-黏结力S1钢管混凝土1648
    S21648
    S11普通钢筋
    混凝土
    1648
    S221648
    箍筋配置影响S31648循环加载至拔出Tmax=24 kN, Tmin=4 kN
    S41648循环加载至拔出Tmax=24 kN, Tmin=4 kN→Tmax=28 kN, Tmin=4 kN
    黏结长度影响S51648循环加载至拔出Tmax=24 kN, Tmin=4 kN→Tmax=28 kN, Tmin=4 kN
    S61664循环加载至拔出Tmax=24 kN, Tmin=4 kN→Tmax=28 kN,
    Tmin=4 kN→Tmax=32 kN, Tmin=4 kN
    循环加载钢筋直径影响S7钢管混凝土1648循环加载至拔出Tmax=24 kN, Tmin=4 kN→Tmax=28 kN, Tmin=4 kN
    S82248循环加载至拔出Tmax=24 kN, Tmin=4 kN→Tmax=28 kN, Tmin=4 kN
    循环次数影响S91648先 500 次循环加载,后单调加载至拔出Tmax=24 kN, Tmin=4 kN→单调加载拔出
    S101648先 10 000 次循环加载,后单调加载至拔出Tmax=24 kN, Tmin=4 kN→单调加载拔出
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-09-14
  • 修回日期:  2021-12-14
  • 网络出版日期:  2023-02-11
  • 刊出日期:  2021-12-30

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