<p>Based on the results of seven corroded reinforced concrete (RC) shear walls with a high shear-span ratio under an artificial climatic environment (ACE) that were subjected to pseudo-static cyclic loading tests, the effects of corrosion degree, as well as the reinforcement ratio of horizontal distribution bars and boundary columns longitudinal bars on seismic performance of corroded RC shear walls were investigated. The experimental results show that the strength, stiffness, ductility and energy-dissipating capacity of the specimen lessened with the raising of corrosion degree. As the horizontal distribution reinforcement ratio improved, bearing capability was slightly enhanced, and the deformation and energy dissipation capacities of the specimens were markedly increased. With the rising boundary column longitudinal reinforcement ratio, the bearing capacity, stiffness degradation rate and cumulative energy consumption of the specimens intensified, and deformability was not significantly increased. After contemplating the correction of corroded materials and the buckling effect of corroded longitudinal bars, a finite element model of corroded RC shear walls was created on the basis of ShellMITC4 layered shell elements. Eventually, employing the constructed numerical model, the variation laws of other parameters on the seismic performance of the corroded RC shear wall were revealed.</p>

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Investigation of the rebar corrosion effect on the seismic behavior of high-rise reinforced concrete shear walls based on experiment and simulation

  • Yue Zheng,
  • Lu Yang,
  • Shansuo Zheng,
  • Honglin Wu,
  • Hao Liu

摘要

Based on the results of seven corroded reinforced concrete (RC) shear walls with a high shear-span ratio under an artificial climatic environment (ACE) that were subjected to pseudo-static cyclic loading tests, the effects of corrosion degree, as well as the reinforcement ratio of horizontal distribution bars and boundary columns longitudinal bars on seismic performance of corroded RC shear walls were investigated. The experimental results show that the strength, stiffness, ductility and energy-dissipating capacity of the specimen lessened with the raising of corrosion degree. As the horizontal distribution reinforcement ratio improved, bearing capability was slightly enhanced, and the deformation and energy dissipation capacities of the specimens were markedly increased. With the rising boundary column longitudinal reinforcement ratio, the bearing capacity, stiffness degradation rate and cumulative energy consumption of the specimens intensified, and deformability was not significantly increased. After contemplating the correction of corroded materials and the buckling effect of corroded longitudinal bars, a finite element model of corroded RC shear walls was created on the basis of ShellMITC4 layered shell elements. Eventually, employing the constructed numerical model, the variation laws of other parameters on the seismic performance of the corroded RC shear wall were revealed.