延潇1,2,史庆轩1,2,徐赵东3.钢纤维对混凝土与变形钢筋之间黏结性能试验研究[J].湖南大学学报:自然科学版,2020,(1):45~52
钢纤维对混凝土与变形钢筋之间黏结性能试验研究
Experimental Study on Bond Behavior between Concrete and Deformed Steel Bar with Different Steel Bar
  
DOI:
中文关键词:  黏结应力  钢纤维混凝土  变形钢筋  拉拔试验
英文关键词:bond stress  steel fiber reinforced concrete  deformed steel bar  pullout testing
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作者单位
延潇1,2,史庆轩1,2,徐赵东3 (1. 西安建筑科技大学 土木工程学院陕西 西安710055 2. 西安建筑科技大学 结构工程与抗震教育部重点实验室陕西 西安 710055 3. 东南大学 土木工程学院江苏 南京210096) 
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中文摘要:
      在对不同掺量钢纤维普通和轻质混凝土试块的基本力学性能试验研究的基础上,通过中心拉拔试验,分析钢纤维对混凝土与变形钢筋之间黏结性能的影响机理. 研究表明:钢纤维的加入提高了混凝土和钢筋之间的黏结性能及混凝土抗裂缝发展的能力. 同时,相同钢纤维掺量下,普通混凝土自身的抗裂缝发展能力高于轻质混凝土,从而使其与钢筋的黏结强度也高于轻质混凝土. 钢纤维的加入使得混凝土对于钢筋的黏结强度显著增大,最大增长率可达到49.94%(普通混凝土钢纤维掺量为40 kg/m3时)和51.94%(轻质混凝土钢纤维掺量为60 kg/m3时). 本文研究可为后续黏结性能的研究提供一定的理论参考,同时推进轻骨料钢纤维混凝土在实际工程中的应用.
英文摘要:
      Based on the study of mechanical property test in normal weight concrete and lightweight concrete with different fiber volume fractions,the influence of steel fiber on the bond mechanism between deformed steel bar and reinforced concrete was discussed through the central pullout test program. It can be found that the ability to resist crack propagate of the concrete was increased because of the steel fiber added in the concrete. The bond behavior of the concrete was also increased. With the same fiber volume fractions in two concretes,normal weight concrete has a better performance to avoid the crack propagation than lightweight concrete. Therefore,the bond behavior of normal weight concrete is also better than that of lightweight concrete. The maximum increase of the reinforced concrete bond strength was 49.94% (normal weight concrete with 40 kg/m3 fiber volume fractions) and 51.94% (lightweight concrete with 60 kg/m3 fiber volume fractions),respectively. The research in this paper can provide theoretical reference for the follow-up research on the bonding performance and promote the application of lightweight aggregate steel fiber concrete in practical engineering.
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