Corrosion of reinforcing steel and subsequent concrete deterioration is a major problem faced by the construction industry. However, limited work is available for the estimation of the shear strength of corrosion-damaged members.;In the present work, an effort has been made to develop a model to predict the shear strength of reinforced concrete beams with varying degree of reinforcement corrosion. The experimental variables included: corrosion duration and the cross section of a beam. A total of 20 reinforced concrete beams with different cross sections as (140 x 220 x 1150 mm & 150 x 240 x 1150 mm) were tested, out of which 4 beams were earmarked as control beams that were not subjected to corrosion and the remaining 16 beams were subjected to corrosion by impressed current technique. All the corroded and control beams were tested in four point bend tests. After the bending tests, the beams were broken to retrieve the reinforcing steel in order to assess the gravimetric weight loss.;Results indicated that the product of corrosion current density and corrosion period IcorrT, is the significant factor affecting the shear strength of a corroded beam. Based on the experimental data, an approach to predict the residual shear strength of corroded beam has been proposed. Monte Carlo simulation was used to determine the probability of failure based on the proposed strength prediction model.
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机译：钢筋腐蚀和随后的混凝土劣化是建筑业面临的主要问题。然而，有限的工作可用于估计腐蚀损伤构件的抗剪强度。在当前工作中，已努力开发一种模型来预测钢筋锈蚀程度不同的钢筋混凝土梁的抗剪强度。实验变量包括：腐蚀持续时间和梁的横截面。总共测试了20条横截面分别为（140 x 220 x 1150 mm和150 x 240 x 1150 mm）的钢筋混凝土梁，其中4条被指定为不受腐蚀的控制梁，其余16条被指定为控制梁。梁通过外加电流技术受到腐蚀。所有腐蚀和控制梁均经过四点弯曲测试。弯曲试验后，将梁折断以回收钢筋，以评估重量损失。结果表明，腐蚀电流密度和腐蚀周期IcorrT的乘积是影响腐蚀梁抗剪强度的重要因素。 。基于实验数据，提出了一种预测锈蚀梁残余抗剪强度的方法。基于提议的强度预测模型，使用蒙特卡洛模拟来确定失效的可能性。
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