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Seismic behavior of high-rise reinforced concrete walls with flange subjected to corrosion under low cyclic loading: an experimental research and numerical model

Yang Lu, Zheng Shan-Suo, Zheng Yue, Liu Hua, Wu Hong-Lin, Zhang Zhi-Wei

Archives of Civil and Mechanical Engineering

2023

Vol. 23, no. 4

art. e261, 1--27

As a result of chloride ion erosion, corrosion of steel bars in coastal or deicing salt environments deteriorates reinforced concrete’s (RC) structural performance. At present, there were few studies involving both chloride ion erosion and shear walls with flange, which made it difficult to evaluate the performance of corroded shear wall structures in coastal environ ments. Consequently, seven high-rise RC shear walls with flange were tested by electrochemical chloride erosion (ECE) and low cyclic loading in this paper, and the influences of key parameters such as corrosion degree, axial compression ratio and reinforcement ratio of longitudinal reinforcement on the hysteretic characteristics of corroded shear walls with flange were investigated. This article assesses the seismic behavior of specimens by analyzing corrosion morphology and dam age processes of concrete and rebars. In addition, scrutiny is placed on failure modes, bearing capability, deformability, and energy-dissipating capacity. Subsequently, according to the failure characteristics and test data, a numerical modeling analysis method based on fiber elements was proposed and validated to obtain the seismic response prediction of corroded shear walls with flange. Finally, based on the built numerical model, the effects of other parameters on the seismic property of corroded shear walls with flange were discussed.