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西南交通大学 土木工程学院,成都 610031
LIN Yongjun (1974-), PhD, associate professor, main research interests: earthquake resistance and damping in structural engineering, E-mail: scsmith@126.com.
ZHANG Jing (corresponding author), PhD, E-mail: zhj1974@swjtu.edu.cn.
Received:18 January 2024,
Published:25 April 2026
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林拥军,余国菲,钟水云等.锈蚀H型钢混凝土界面黏结滑移性能试验及本构模型[J].土木与环境工程学报,2026,48(02):212-225.
LIN Yongjun,YU Guofei,ZHONG Shuiyun,et al.Experimental and constitutive modeling of bond-slip behavior at the interface of corroded H-shaped steel and concrete[J].Journal of Civil and Environmental Engineering,2026,48(02):212-225.
林拥军,余国菲,钟水云等.锈蚀H型钢混凝土界面黏结滑移性能试验及本构模型[J].土木与环境工程学报,2026,48(02):212-225. DOI: 10.11835/j.issn.2096-6717.2024.035.
LIN Yongjun,YU Guofei,ZHONG Shuiyun,et al.Experimental and constitutive modeling of bond-slip behavior at the interface of corroded H-shaped steel and concrete[J].Journal of Civil and Environmental Engineering,2026,48(02):212-225. DOI: 10.11835/j.issn.2096-6717.2024.035.
针对以H型钢作为骨架的无筋混凝土结构,制作锈蚀率分别为0、5%、10%、15%和20%的H型钢混凝土试件,开展推出试验,分析不同锈蚀程度下H型钢-混凝土界面的黏结应力-滑移关系,并提出一种通过测试混凝土表面的压缩位移获得钢-混凝土界面黏结应力分布的试验方法。基于试验观察提出化学黏结、微观机械黏结、宏观机械黏结和铁锈界面黏结4种微观机制,以解释锈蚀对H型钢混凝土黏结性能的影响。构建考虑锈蚀率影响的黏结应力-滑移本构关系模型,引入界面损伤参数,对不同锈蚀率下的界面损伤演化过程进行分析。结果表明:H型钢-混凝土界面的初始黏结刚度随着锈蚀率的增加而提高,但在达到峰值应力后,界面刚度的下降速率随锈蚀率的增加而加快;当H型钢锈蚀率较高(≥15%)时,界面黏结滑移曲线呈双峰值特征,即先上升后下降,然后再次上升,最终趋于下降;随着锈蚀率的增加,化学黏结和微观机械黏结的作用逐渐增强,而宏观机械黏结和铁锈界面黏结的作用则逐渐减弱;所建立的考虑锈蚀率影响的黏结应力-滑移本构关系表达式能较好地描述锈蚀H钢-混凝土界面的黏结特性;尽管锈蚀率的增加会加速界面刚度的减退,但对试件破坏时损伤程度的影响较为有限。
In the case of unreinforced concrete structures that utilise H-shaped steel as a skeletal framework
concrete specimens integrated with H-shaped steel were prepared to represent varying degrees of corrosion
specifically rates of 0%
5%
10%
15%
and 20%. Push-out tests were conducted to analyze the bond stress-slip relationship between H-shaped steel and concrete under different corrosion levels at the interface. This paper sets out an experimental method to derive the distribution of bond stress across the steel-concrete interface. The method involves measuring the compressive displacement on the surface of the concrete. It is evident from the observations derived from the experimental tests that four microscopic mechanisms are postulated to elucidate the impact of corrosion on the bond performance of H-shaped steel in concrete. A constitutive relationship was constructed
incorporating the effect of the corrosion rate on bond stress-slip
and an interface damage parameter was introduced to analyze the evolution of interface damage under varying corrosion rates. The research results indicate that the initial bond stiffness at the H-shaped steel-concrete interface increases with the corrosion rate. Nonetheless
upon attaining peak stress levels
the rate of decline in interface stiffness is observed to accelerate concomitantly with an increase in corrosion rate. It is noteworthy that at elevated corrosion rates (≥15%)
the bond-slip curve manifests a dual-peak feature
initially ascending
then descending
followed by an additional rise
and ultimately a decline. As the corrosion rate increases
the roles of chemical bonding and microscopic mechanical bonding become more dominant
while the contributions of macroscopic mechanical bonding and rust interface bonding diminish. The developed constitutive relationship
validated through comparative analysis with existing models
accurately describes the bond characteristics at the corroded H-shaped steel-concrete interface. Although an increase in corrosion rate hastens the reduction of interface stiffness
its influence on the extent of damage observed upon specimen failure is relatively limited.
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