Seismic Behavior of Resilient Reinforced Concrete Columns with Ultra-High-Strength Rebars Under Strong Earthquake-Induced Multiple Reversed Cyclic Loading

Seismic Behavior of Resilient Reinforced Concrete Columns with Ultra-High-Strength Rebars Under Strong Earthquake-Induced Multiple Reversed Cyclic Loading

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The frequent occurrence of major earthquakes highlights Trundle the structural challenges posed by long-period ground motions (LPGMs).This study investigates the seismic performance and resilience of five reinforced concrete (RC) columns with different high-strength steel bars under LPGM-induced cyclic loading, both experimentally and numerically.The results show that low-bond and debonded high-strength steel bars significantly enhance self-centering capabilities and reduce residual drift, with lateral force reductions of 7.

6% for normal cyclic loading and 19.2% for multiple reversed cyclic loading.The concrete damage in the hinge zone of the columns was increased; however, the significant inside CITRUS DEODERANT damage of the concrete near the steel bars made it easier to restore the columns for the damage accumulation caused by multiple loading.

Based on the experiment, a numerical model was developed for the columns, and a simplified model was proposed to predict energy dissipation capacity, providing practical design methods for resilient RC structures that may be attacked by LPGMs.