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Effect of corrosion of tensile rebars and stirrups on the flexural stiffness of reinforced concrete members

机译:钢筋和箍筋的腐蚀对钢筋混凝土构件抗弯刚度的影响

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摘要

This article introduces the results of experiments on 25-year-old reinforced concrete beams under the effect of service load. Two reinforced concrete beams were stored in a chloride environment and allowed to corrode, while a non-corroded control beam was stored in the normal laboratory environment. A finite macro-element model for corroded reinforced concrete, taking account of the influence of corrosion development and the reduction of the bond between longitudinal steel reinforcement and concrete, was applied to calculate the mechanical behaviour of the beams. The comparison between the theoretical calculation and the experimental results showed that, when evaluating the mechanical behaviour of corroded reinforced concrete, besides the factors of length, width of cracks due to corrosion, and the number of cross-beam-axis cracks, it is necessary to consider transverse cracks in the cross-section of the beam due to corrosion of the transverse reinforcement.
机译:本文介绍了在使用荷载作用下25岁的钢筋混凝土梁的试验结果。将两根钢筋混凝土梁存储在氯化物环境中并使其腐蚀,而未腐蚀的控制梁则存储在正常实验室环境中。考虑腐蚀发展的影响以及纵向钢筋与混凝土之间粘结力的降低,对锈蚀钢筋混凝土进行了有限元模型计算,计算了梁的力学性能。理论计算与实验结果的比较表明,在评价锈蚀钢筋混凝土的力学性能时,除因腐蚀引起的裂纹的长度,宽度,横梁轴裂纹的数量等因素外,还有必要考虑由于横向钢筋腐蚀引起的梁横截面上的横向裂缝。

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