In this study, a total of 177 flexural experimental tests of corroded reinforced concrete (CRC) beams were collected from the published literature. The database of flexural capacity of CRC beam was established by using unified and standardized experimental data. Through this database, the effects of various parameters on the flexural capacity of CRC beams were discussed, including beam width, the effective height of beam section, ratio of strength between longitudinal reinforcement and concrete, concrete compressive strength, and longitudinal reinforcement corrosion ratio. The results indicate that the corrosion of longitudinal reinforcement has the greatest effect on the residual flexural capacity of CRC beams, while other parameters have much less effect. In addition, six available empirical models for calculating the residual flexural strength of CRC beams were also collected and compared with each other based on the established database. It indicates that though five of six existing empirical models underestimate the flexural capacity of CRC beams, there is one model overestimating the flexural capacity. Finally, a newly developed empirical model is proposed to provide accurate and effective predictions in a large range of corrosion ratio for safety assessment of flexural failure of CRC beams confirmed by the comparisons.

中文翻译：

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锈蚀钢筋混凝土梁剩余抗弯承载力预测的新经验模型

在这项研究中，从已出版的文献中收集了总共177条锈蚀钢筋混凝土（CRC）梁的弯曲试验。利用统一标准化的实验数据建立了CRC梁的抗弯承载力数据库。通过该数据库，讨论了各种参数对CRC梁抗弯能力的影响，包括梁的宽度，梁截面的有效高度，纵向钢筋与混凝土之间的强度比，混凝土抗压强度以及纵向钢筋的腐蚀比。结果表明，纵向钢筋的腐蚀对CRC梁的残余挠曲能力影响最大，而其他参数的影响则小得多。此外，还收集了六个可用于计算CRC梁残余抗弯强度的经验模型，并基于已建立的数据库相互比较。它表明，尽管六个现有的经验模型中有五个低估了CRC梁的抗弯能力，但有一个模型高估了抗弯能力。最后，提出了一种新开发的经验模型，以在大范围的腐蚀比中提供准确和有效的预测，以通过比较确认CRC桥弯曲破坏的安全性评估。