Several bond–slip models considering corrosion effects are available in the literature to describe the change in bond due to corrosion of longitudinal reinforcement. However, these models do not consider either the beneficial effect of stirrups or corrosion of the stirrups. This is very important because stirrups provide a confinement effect that enhances the bond strength of reinforcement, but the effect deteriorates with corrosion impacts. To address this limitation, a new bond–slip model was developed that includes the influence of corrosion of both the reinforcement and stirrups. More significantly, the model also provides a correlation between the corrosion in stirrups and longitudinal reinforcement. This means that the model can be applied with knowledge of the corrosion of either the longitudinal reinforcement or the stirrups. This is beneficial for the prediction of the corrosion level of longitudinal bars and, to take a step further, for the prediction of the mechanical behaviour of structures as it is relatively easy to measure the corrosion level of stirrups physically. The new model is presented in this paper along with a parametric study based on the developed model.

中文翻译：

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箍筋对锈蚀钢筋混凝土粘结性能的影响

文献中提供了几种考虑腐蚀效应的粘结滑移模型来描述由于纵向钢筋腐蚀引起的粘结变化。然而，这些模型没有考虑箍筋的有益影响或箍筋的腐蚀。这非常重要，因为箍筋提供了增强钢筋结合强度的限制效果，但该效果会随着腐蚀影响而恶化。为了解决这个限制，开发了一种新的粘结滑移模型，其中包括钢筋和箍筋的腐蚀影响。更重要的是，该模型还提供了箍筋腐蚀与纵向钢筋之间的相关性。这意味着该模型可以在了解纵向钢筋或箍筋腐蚀的情况下应用。这有利于预测纵向钢筋的腐蚀水平，更进一步，有利于预测结构的力学行为，因为物理测量箍筋的腐蚀水平相对容易。本文介绍了新模型以及基于开发模型的参数研究。