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首页> 外文期刊>Magazine of Concrete Research >Effect of loading rate on the bond behaviour of plain round bars in concrete subjected to uniaxial lateral tension
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Effect of loading rate on the bond behaviour of plain round bars in concrete subjected to uniaxial lateral tension

机译:装载率对普通圆形条粘隙行为对单轴横向张力的粘接性能

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摘要

The bond between reinforcement and concrete is one of the main factors affecting structural performance. In terms of the bond mechanism, the bond performance of plain round bars is especially sensitive to the stress state of the surrounding concrete. Lateral tensions have been confirmed to significantly weaken the bond properties of plain round bars but the effect of loading rate on such a condition is still not well understood. Experiments involving 178 pull-out specimens with various concrete strengths and bar diameters were performed to analyse the influence of loading rate on the bond behaviour of plain round bars embedded in concrete under uniaxial lateral tension. The main bond parameters were evaluated quantitatively. The results showed that bond strength was independent of loading rate and the ratio of residual strength to bond strength remained constant, but the slip at the peak bond stress decreased obviously with an increase in loading rate. An empirical constitutive model of bond stress-slip considering the concrete strength, bar diameter, uniaxial lateral tension and loading rate was developed and validated with experimental results.
机译:加固和混凝土之间的债券是影响结构性能的主要因素之一。就粘接机构而言,普通圆形条的粘合性能对周围混凝土的应力状态特别敏感。已经证实横向张力显着削弱了普通圆形条的粘合性能,但是载入速率对这种情况的影响仍未得到很好的理解。涉及具有各种混凝土强度和条形直径的178个拉出样品的实验,分析了在单轴横向张力下嵌入混凝土中的普通圆形条的粘合行为对混凝土的粘合行为的影响。定量评估主要键参数。结果表明,粘合强度与装载速率无关,并且残余强度与粘合强度的比例保持恒定,但峰值键应力下的滑移随着装载速率的增加而明显降低。考虑混凝土强度,棒直径,单轴横向张力和装载速率的粘合胁迫滑移的经验构成模型并用实验结果验证。

著录项

  • 来源
    《Magazine of Concrete Research》 |2021年第20期|1033-1047|共15页
  • 作者单位

    Dalian Univ Technol State Key Lab Coastal & Offshore Engn Dalian Peoples R China;

    Dalian Univ Technol State Key Lab Coastal & Offshore Engn Dalian Peoples R China;

    Zhejiang Univ Technol Sch Civil Engn & Architecture Hangzhou Peoples R China;

    Univ Castilla La Mancha ETSI Caminos C&P Ciudad Real Spain;

    Brunel Univ Dept Civil & Environm Engn London England;

  • 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

    bond; pull-out testing; reinforcement;

    机译:债券;拉出测试;加固;

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