[1]李可、徐朝阳、吴凯鑫、王新玲.600MPa级钢筋与高强混凝土粘结-滑移关系研究[J].郑州大学学报(工学版),2021,42(02):55-61.[doi:10.13705/j.issn.1671-6833.2021.02.013]
　Li Ke,Xu Chaoyang,Wu Kaixin,et al.Research on Bond-slip Relationship of 600 MPa Grade Steel Bar and High-strength Concrete[J].Journal of Zhengzhou University (Engineering Science),2021,42(02):55-61.[doi:10.13705/j.issn.1671-6833.2021.02.013]
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600MPa级钢筋与高强混凝土粘结-滑移关系研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
42
期数:
2021年02期
页码:
55-61
栏目:
出版日期:
2021-04-12

文章信息/Info

Title:
Research on Bond-slip Relationship of 600 MPa Grade Steel Bar and High-strength Concrete
作者:
李可、徐朝阳、吴凯鑫、王新玲
郑州大学土木工程学院;中国电建集团华东勘测设计研究院;
Author(s):
Li Ke; Xu Chaoyang; Wu Kaixin; Wang Xinling;
School of Civil Engineering, Zhengzhou University; East China Investigation and Design Research Institute of China Electricity Construction Group;
关键词:
Keywords:
Research on Bond-slip Relationship of 600 MPa Grade Steel Bar and High-strength Concrete
DOI:
10.13705/j.issn.1671-6833.2021.02.013
文献标志码:
A
摘要:
高强与的粘结是二者协同工作的基础，且粘结-滑移关系模型是其粘结性能的综合反映，为了探究600MPa级钢筋与高强混凝土粘结-滑移关系，考虑混凝土、粘结锚固长度以及保护层厚度对粘结-滑移关系的影响，设计了42个试件进行中心拉拔试验研究。结果表明：600MPa级高强钢筋在高强混凝土中的拉拔破坏模式包括钢筋拔出破坏、混凝土劈裂破坏、钢筋屈服破坏三种；在不发生钢筋屈服破坏情况下，极限拉拔荷载随混凝土强度、粘结锚固长度、钢筋直径的增加而增大基于试验结果，对600MPa级钢筋与高强混凝土粘结破坏特征和粘结-滑移机理进行分析，提出了劈裂破坏情况下600MPa级钢筋与高强混凝土的粘结-滑移关系模型及模型参数的计算公式，所提模型及模型参数计算公式与试验结果吻合良好。
Abstract:
In order to explore the bonding-slip relationship of 600 MPa grade steel with high strength concrete and to provide the theory basis for the application of reinforcing steel bar in concrete structure. The four groups of 42 specimens center drawing tests were conducted to explore the impact of concrete strength, steel bar anchoring length and thickness of concrete cover on the bonding-slip relationship.The results showed that the drawing failure modes of 600 MPa high strength steel bar in high strength concrete included three modes: pull-out failure, concrete splitting failure and steel yield failure.The bond-slip curve of reinforcement pull-out failure included rising section (including micro-slip section, slip section and splitting section), falling section, and residual section.The bond-slip curve of concrete splitting failure only included the ascending section (including micro-slip section, slip section and splitting section);Bond-slip curve of yield failure of steel bar, including rising section (including micro-slip section, slip section) and horizontal section.The ultimate drawing load included with the increase of concrete strength, anchorage length and diameter of steel bar under the condition of no yield failure.Based on the test results, the bond failure characteristics and bond-slip mechanism of 600 MPa steel bar and high-strength concrete were analyzed, and the bond-slip relationship model of 600 MPa steel bar and high-strength concrete under splitting failure condition and the calculation formula of model parameters were proposed. The proposed model and the calculation formula of model parameters were in good agreement with the test results.

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更新日期/Last Update: 2021-05-30