Limit Equilibrium Method-based Shear Strength Prediction for Corroded Reinforced Concrete Beam with Inclined Bars

• Published in: Materials Vol. 12; no. 7; p. 1014
• Main Authors: Ma, Yafei, Lu, Baoyong, Guo, Zhongzhao, Wang, Lei, Chen, Hailong, Zhang, Jianren
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 27.03.2019; MDPI
• Subjects: Bars; Building codes; Concrete; Concrete structures; Corrosion; Cracks; diagonal crack; Equilibrium; inclined bar; Reinforced concrete; Reinforcing steels; Shear strength; Tensile strength; Yield stress; shear strength; corrosion; reinforced concrete; diagonal crack; inclined bar
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma12071014

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.