<p>The current study aims to provide a basic understanding of the seismic response of RC columns with corrosion damage at two distinct levels (5 and 10% mass loss in steel reinforcement) and the specimens were enhanced with basalt fabric reinforced cementitious matrix (BFRCM) incorporating short Polyvinyl Alcohol (PVA) fibre. Six configurations of column specimens cast were divided into two groups. The first group of specimens had a mass reduction of 5% in steel reinforcement and strengthened with three, and five layers of BFRCM, while the second group of specimens were strengthened with three and five layers of BFRCM and had a mass reduction of 10% in steel reinforcement. The reinforcement arrangement was identical for all the specimens. The specimens were subjected to a constant axial and reverse cyclic loads. The seismic parameters of the specimens were explored, including ultimate load-carrying capacity, hysteresis response, energy dissipation, displacement ductility and stiffness properties. The increase in stiffness indicated that the columns strengthened with BFRCM had better structural strength as it sustained higher loads with lesser deflection. BFRCM strengthened specimens also showed increase in stiffness and energy dissipation capability by approximately 35% compared to the corroded specimens.</p>

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Influence of Basalt Fabric Reinforced Cementitious Matrix (BFRCM) in Corroded RC Columns Under Cyclic Loading

  • Chellappandian Rajendra Prasath,
  • Chandrasekaran Jayaguru

摘要

The current study aims to provide a basic understanding of the seismic response of RC columns with corrosion damage at two distinct levels (5 and 10% mass loss in steel reinforcement) and the specimens were enhanced with basalt fabric reinforced cementitious matrix (BFRCM) incorporating short Polyvinyl Alcohol (PVA) fibre. Six configurations of column specimens cast were divided into two groups. The first group of specimens had a mass reduction of 5% in steel reinforcement and strengthened with three, and five layers of BFRCM, while the second group of specimens were strengthened with three and five layers of BFRCM and had a mass reduction of 10% in steel reinforcement. The reinforcement arrangement was identical for all the specimens. The specimens were subjected to a constant axial and reverse cyclic loads. The seismic parameters of the specimens were explored, including ultimate load-carrying capacity, hysteresis response, energy dissipation, displacement ductility and stiffness properties. The increase in stiffness indicated that the columns strengthened with BFRCM had better structural strength as it sustained higher loads with lesser deflection. BFRCM strengthened specimens also showed increase in stiffness and energy dissipation capability by approximately 35% compared to the corroded specimens.