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首页> 外文期刊>Magazine of Concrete Research >Bond properties for plain bars in frost-damaged concrete
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Bond properties for plain bars in frost-damaged concrete

机译：冻结混凝土中普通条的粘合性能

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摘要

The bond properties for plain bars in frost-damaged concrete under monotonic and reversed cyclic loading were investigated. Rapid freeze-thaw and the pull-out tests were carried out on the specimens with three kinds of concrete strength grade. The compressive strength of frost-damaged concrete and the bond stress-slip response of the specimens with different concrete strength grades and freeze-thaw cycles were obtained. The effect of concrete strength grade and of the freeze-thaw cycle on the bond behaviours between concrete and plain bars was studied. Results indicated that, with the increase in the number of freeze-thaw cycles, the bond strength, residual bond capacity, residual bond stress and the cyclic bond stress decreased while the peak slip increased, as well as there being a more obvious bond degradation rate for the specimens with the same concrete strength grade. For specimens subject to the same number of freeze-thaw cycles, the bond strength, residual bond capacity, residual bond stress and the cyclic bond stress increased with the increasing concrete strength grade. A bond-slip model for plain bars in frost-damaged concrete under monotonic and reversed cyclic loading is proposed, which can be used for performance evaluation of existing reinforced-concrete structures in cold areas.
机译：研究了单调和逆转循环载荷下冰霜损坏混凝土中普通杆的粘合性能。快速冻融和拉出试验在具有三种混凝土强度等级的标本上进行。获得了冰霜损坏混凝土的抗压强度和具有不同混凝土强度等级和冻融循环的标本的粘合应力滑移响应。研究了混凝土强度等级和冻融循环对混凝土和普通条之间的债券行为的影响。结果表明，随着冻融循环循环的数量的增加，粘接强度，残留粘合能力，残留粘应力和循环键应力下降，而峰值滑移增加，以及更明显的粘合降解率对于具有相同混凝土强度等级的标本。对于经受相同数量的冻融循环，粘合强度，残留粘合能力，残留粘应力和循环键应力随着混凝土强度等级的增加而增加的试样。提出了一种单调和逆转循环载荷下冰霜损坏混凝土普通杆的粘合模型，可用于寒冷地区现有钢筋混凝土结构的性能评价。

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  • 来源
    《Magazine of Concrete Research》 |2019年第18期|975-988|共14页
  • 作者

    Xu Shanhua; Nie Biao; Li Anbang;

  • 作者单位

    Xian Univ Architecture & Technol Sch Civil Engn Xian Shaanxi Peoples R China;

    Xian Univ Architecture & Technol Sch Civil Engn Xian Shaanxi Peoples R China;

    Xian Univ Architecture & Technol Sch Civil Engn Xian Shaanxi 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

    bond; durability-related properties; modelling;

    机译：债券;耐久性相关的属性;建模;

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