The deterioration of reinforced concrete (RC) structures due to chloride-induced corrosion is not spatially uniform because of the spatial variability related to material properties and environmental stressors. This variation has a substantial effect on the reliability of RC structures. However, few experimental studies have focused on the effect of the interaction of corrosion pits among tensile rebars on the reliability of RC structures. Therefore, in this paper, an experimental procedure that incorporates X-ray and digital image processing techniques was conducted on RC slab specimens subjected to accelerated corrosion. Using the experimental results, the parameter of the transverse correlation function of steel weight loss distributions was estimated to investigate how the corrosion pits in corroded rebars are correlated. Based on the experimentally obtained model parameters, the spatial steel weight loss distributions were simulated by spectral representation method. A three-dimensional (3D) nonlinear finite element (FE) analysis of RC structures with simulated steel weight loss distributions was conducted to obtain the ultimate bending capacity of RC structures. In an illustrative example, the effect of the transverse correlation among steel weight loss distributions of multiple tensile rebars on the failure probability of RC girders was quantified.

由于与材料特性和环境压力因素相关的空间可变性，氯化物引起的腐蚀引起的钢筋混凝土 (RC) 结构在空间上不均匀。这种变化对 RC 结构的可靠性有重大影响。然而，很少有实验研究关注受拉钢筋之间腐蚀坑的相互作用对钢筋混凝土结构可靠性的影响。因此，在本文中，对经受加速腐蚀的 RC 板坯试样进行了结合 X 射线和数字图像处理技术的实验程序。利用实验结果，估计了钢材失重分布的横向相关函数参数，以研究锈蚀钢筋中的腐蚀坑是如何相关的。基于实验得到的模型参数，采用光谱表示法模拟了空间钢材失重分布。对钢筋混凝土结构进行三维 (3D) 非线性有限元 (FE) 分析和模拟钢重量损失分布，以获得钢筋混凝土结构的极限弯曲能力。在一个说明性示例中，量化了多个受拉钢筋的钢重量损失分布之间的横向相关性对 RC 梁失效概率的影响。对钢筋混凝土结构进行三维 (3D) 非线性有限元 (FE) 分析和模拟钢重量损失分布，以获得钢筋混凝土结构的极限弯曲能力。在一个说明性示例中，量化了多个受拉钢筋的钢重量损失分布之间的横向相关性对 RC 梁失效概率的影响。对钢筋混凝土结构进行三维 (3D) 非线性有限元 (FE) 分析和模拟钢重量损失分布，以获得钢筋混凝土结构的极限弯曲能力。在一个说明性示例中，量化了多个受拉钢筋的钢重量损失分布之间的横向相关性对 RC 梁失效概率的影响。