Abstract This paper presents the corrosion-induced cracking process of a corroded reinforced concrete beam exposed to a chloride environment for 26 years. The cracking maps of the beam were drawn during different corrosion periods. The first corrosion-induced cracks in the compression zone occurred at about the 5th year and then developed significantly. The corrosion-induced cracks in the tension zone appeared at about the 7th year, followed by the stirrup zones in the transversal sections. At about the 14th year, the width of the cracks in the tension zone exceeded that in the compression zone. The cracks in the tension zone became connected almost throughout the span. The top-bar effect, bleeding and the “top surface ponding effect” led to the appearance of corrosion-induced cracks first in the compression zones, while the corrosion-induced cracks in the tension zone increased more significantly in both length and width as a result of the sustained load.

中文翻译：

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26 年持续载荷下暴露于海洋环境的钢筋混凝土梁腐蚀裂纹的扩展

摘要 本文介绍了暴露于氯化物环境 26 年的锈蚀钢筋混凝土梁的腐蚀开裂过程。绘制了梁在不同腐蚀时期的开裂图。压缩区的第一个腐蚀诱导裂纹发生在第 5 年左右，然后显着发展。在第 7 年左右出现张力区的腐蚀裂纹，其次是横截面的箍筋区。大约在第 14 年时，受拉区的裂缝宽度超过受压区的裂缝宽度。张力区的裂缝几乎在整个跨度中都连接在一起。顶杆效应、泌水和“顶面积水效应”导致腐蚀引起的裂纹首先出现在压缩区，