| 引用本文: | 董宏英,孙文娟,曹万林,赵洪飞.钢筋-再生混凝土黏结滑移性能试验[J].哈尔滨工业大学学报,2017,49(12):82.DOI:10.11918/j.issn.0367-6234.201705005 |
| DONG Hongying,SUN Wenjuan,CAO Wanlin,ZHAO Hongfei.Experimental study on bond-slip behavior between steel bars and recycled concrete[J].Journal of Harbin Institute of Technology,2017,49(12):82.DOI:10.11918/j.issn.0367-6234.201705005 |
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| 摘要: |
| 为研究钢筋与再生混凝土界面黏结性能和本构关系，考虑再生粗骨料取代率、再生细骨料取代率、钢筋类型、钢筋直径、锚固长度的影响，设计了15个梁式试件进行钢筋-再生混凝土黏结滑移性能试验.综合分析上述变量对荷载-滑移曲线、黏结强度、黏结效率的影响规律，给出了黏结-滑移本构关系的建议.结果表明：随再生粗骨料取代率增加，钢筋与混凝土之间的黏结强度减小，而抗滑移能力增强；再生细骨料的加入，导致再生混凝土的黏结性能明显退化；螺纹钢筋与再生混凝土的黏结强度约为光圆钢筋的2倍；钢筋与再生混凝土的界面黏结性能随着钢筋直径和锚固长度的增加而降低；建议的钢筋-再生混凝土的黏结-滑移本构关系和参数，与试验结果拟合较好.
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| 关键词: 再生混凝土 梁式试件 黏结性能 黏结效率系数 黏结-滑移本构关系 |
| DOI：10.11918/j.issn.0367-6234.201705005 |
| 分类号:TU528.01 |
| 文献标识码:A |
| 基金项目:国家重点研发计划(2017YFc0703304); 国家自然科学基金重点项目(51438007) |
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| Experimental study on bond-slip behavior between steel bars and recycled concrete |
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DONG Hongying,SUN Wenjuan,CAO Wanlin,ZHAO Hongfei
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(Key Laboratory of Urban Security and Disaster Engineering (Beijing University of Technology), Ministry of Education, Beijing 100124, China)
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| Abstract: |
| To investigate the bond behavior and constitutive relationship at the interface between steel bars and recycled concrete, 15 beam-type specimens were designed to test the bond-slip behavior of reinforced recycled concrete. The design parameters included recycled coarse aggregate substitution, recycled fine aggregate substitution, steel bar shape, steel bar diameter and anchorage length. The influence of the above variables on the load-slip curves, bond strength and bond efficiency coefficient between steel bars and recycled concrete was analyzed synthetically, and the bond-slip constitutive relationship was proposed. The results show that: with the increase of recycled coarse aggregate replacement ratio, the bond strength between steel bars and concrete decreases; however, the anti-slid ability increases. The recycled fine aggregate addition makes the bond behavior become weaker significantly. The bond strength between deformed bars and recycled concrete is about 2 times of that between plain bars and recycled concrete. The interfacial bond behavior of reinforced recycled concrete becomes poorer with the increase of steel bar diameter and anchorage length. The proposed bond-slip constitutive relationship and parameters of reinforced recycled concrete fit the experimental results well.
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| Key words: recycled concrete beam-type specimens bond behavior bond efficiency coefficient bond-slip constitutive relation |
