Abstract
Shear strength is a widely investigated parameter for reinforced concrete structures. The corrosion of reinforcement results in shear strength reduction. Corrosion has become one of the main deterioration factors in reinforced concrete beam. This paper proposes a shear strength model for beams with inclined bars based on a limit equilibrium method. The proposed model can be applied to both corroded and uncorroded reinforced concrete beams. Besides the tensile strength of longitudinal steel bars, the shear capacity provided by the concrete on the top of the diagonal crack, the tensile force of the shear steel at the diagonal crack, the degradation of the cross-sectional area and strength of the reinforcements induced by corrosion are all considered. An experimental work on two groups accelerated corroded beams was performed. Good agreements were found between the proposed theoretical predictions and experimental observations.
Highlights
The corrosion of reinforcement is an important factor contributing to the performance deterioration of existing reinforced concrete (RC) structures [1,2,3,4]
They found that the mean crack width is most closely related to the decrease of shear strength caused by corrosion
The current study aimed to investigate the influences of mass loss induced by corrosion on the shear strength degradation of RC members subjected to different corrosion conditions
Summary
The corrosion of reinforcement is an important factor contributing to the performance deterioration of existing reinforced concrete (RC) structures [1,2,3,4]. Xia et al [27] examined the shear behavior of concrete members that have various damage degrees on longitudinal rebars and stirrups They found that the mean crack width is most closely related to the decrease of shear strength caused by corrosion. Wang et al [34] proposed a modified shear strength prediction model based on ACI code In this model, the area loss of deteriorated shear steel bars and concrete damage are included. Most of the above studies investigate the corrosion-induced shear behavior deterioration in RC beams with stirrups perpendicular to the longitudinal steel bar. Zhang et al [36] suggested a theoretical shear strength model of RC members with inclined rebar They did not consider the corrosion of steel bars, and only used to two beams for validation. Some conclusions are drawn and future suggestions are made based on the present study
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