考虑多因素影响的锈蚀钢筋混凝土黏结滑移性能

刘翰昇 ,  应宗权 ,  杜成斌 ,  赵志伟 ,  刘梅梅

科学技术与工程 ›› 2025, Vol. 25 ›› Issue (33) :14390-14401

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科学技术与工程 ›› 2025, Vol. 25 ›› Issue (33) :14390-14401 DOI: 10.12404/j.issn.1671-1815.2409521
建筑科学

考虑多因素影响的锈蚀钢筋混凝土黏结滑移性能

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Bond-slip Performance of Corroded Reinforced Concrete Considering Influence of Multiple Factors

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摘要

钢筋混凝土作为工程领域中一种广泛应用的复合材料,其耐久性与安全性一直是相关领域研究的热点。在实际工程中,钢筋与混凝土之间的黏结滑移性能是影响结构安全与稳定的重要因素。研究了钢筋混凝土锚固长度、相对保护层厚度、箍筋指数、纵箍筋锈蚀率等多因素耦合下钢筋与混凝土之间的黏结滑移性能的影响。首先,基于统计收集到的未锈蚀钢筋混凝土极限黏结滑移强度的梁式与拔出式试验共75个试验结果,建立考虑锚固长度、相对保护层厚度和箍筋指数的未锈蚀钢筋混凝土黏结强度预测模型,预测结果与试验结果取得了较好的一致。然后,基于收集到的240个锈蚀钢筋混凝土试件拉拔试验结果,拟合给出考虑纵、箍筋锈蚀率、混凝土强度以及锚固长度的锈蚀黏结强度折减关系,与试验数据对比结果表明,在对黏结应力预测结果进行锈蚀折减时考虑上述因素更为合理。最后,基于ABAQUS有限元软件,在与有关试验结果充分对比的基础上,对拉拔模型有限元结果进行验证与分析,模拟结果与实验数据取得了较好的一致性。

Abstract

Reinforced concrete, as a widely used composite material in the engineering field, has always been a hot topic of research in relevant fields regarding its durability and safety. In practice, the bond-slip performance between steel reinforcement and concrete is crucial for ensuring structural safety and stability. The influence of multiple factors such as the anchoring length of reinforced concrete, the thickness of the relative protective layer, the stirrup index, and the longitudinal stirrup corrosion rate on the bond-slip between reinforcing bars and concrete was studied. Initially, a bond strength prediction model for uncorroded specimens was developed based on a statistical analysis of 75 test results from beam and pull-out experiments. A prediction model for the bonding strength of uncorroded reinforced concrete considering the anchoring length, the relative protective layer thickness and the stirrup index was established, and the prediction results were in good agreement with the test results. Subsequently, a bond strength degradation model for corroded specimens was established using 240 pull-out test results, considering the corrosion rate of longitudinal rebars and stirrups, concrete strength, and anchorage length. It shows that the predictions matches the experimental observations more closely by accounting for those factors. Finally, the pull-out model is validated and analyzed using ABAQUS finite element analysis, with the simulation results showing good agreement with the experimental data.

关键词

锈蚀钢筋混凝土 / 黏结滑移性能 / 多因素 / 黏结强度 / ABAQUS

Key words

corroded reinforced concrete / bond-slip performance / multiple factors / bond strength / ABAQUS

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刘翰昇, 应宗权, 杜成斌, 赵志伟, 刘梅梅. 考虑多因素影响的锈蚀钢筋混凝土黏结滑移性能[J]. 科学技术与工程, 2025, 25(33): 14390-14401 DOI:10.12404/j.issn.1671-1815.2409521
LIU Han-sheng, YING Zong-quan, DU Cheng-bin, ZHAO Zhi-wei, LIU Mei-mei. Bond-slip Performance of Corroded Reinforced Concrete Considering Influence of Multiple Factors[J]. Science Technology and Engineering, 2025, 25(33): 14390-14401 DOI:10.12404/j.issn.1671-1815.2409521

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基金资助

水工构造物耐久性技术交通运输行业重点实验室开放课题(522017412)

国家重点研发计划(2018YFE0122400)

河海大学大学生创新训练项目(2022102941309)

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