中文摘要：

裂缝特征是反映钢筋混凝土构件正常使用极限状态的一个重要指标．制作了37片不同钢筋类型和配筋率的钢筋混凝土梁，通过外加电流的方法使其加速锈蚀，并通过电流强度、通电时间控制其锈蚀率．讨论了试件在静载试验中的裂缝开展过程及特点．通过与《公路钢筋混凝土及预应力混凝土桥涵设计规范》（JTGD62—2004）和《混凝土结构设计规范》（GB50010—2002）相关公式进行对比分析，建立了钢筋锈蚀率与平均裂缝间距、裂缝宽度的关系．试验研究结果表明，锈蚀率较小时，钢筋混凝土受弯构件的裂缝特征与普通钢筋混凝土构件相同；而锈蚀率较大时，裂缝间距变大，宽度增加．该结果可用于锈蚀钢筋混凝土受弯构件承载力的评估．

英文摘要：

The character of cracks is an important index for estimating the serviceability limit state of the reinforced concrete（RC）structure. 37 RC beams with different reinforced bar types and ratio of reinforced were made in the laboratory. The stage of accelerated corrosion was achieved by impressing direct current on the reinforced bars. The corrosion ratio was controlled by the electric intensity and the electric passing time. The cracking process and the characteristic of cracks in the static load test are discussed. Based on the comparative analysis to the calculated results specified in the code for design of highway reinforced concrete and prestressed concrete bridges and culverts（CDHRCPCBC） JTG D62-2004 and Code for design of concrete structures（CDCS） GB 50010-2002 ,the relationship between the corrosion ratio and average spacing of reinforced concrete is established, and the relationship between the corrosion ratio and the crack width is also given. All the results indicate when the corrosion ratio is small,the character of cracks of the reinforced concrete bending members isthe same as that of members without corrosion; however, when the corrosion ratio is large, both the spacing and the width of the crack are increased. The models can be used for evaluation of the flexural strength of corrosive RC members.