TY  - EJOU
AU  - Zhang, Zhao-Jun 
AU  - Zhen, Jing-Shui 
AU  - Li, Bo-Cheng 
AU  - Cai, De-Cheng 
AU  - Du, Yang-Yang 
AU  - Wang, Wen-Wei 

TI  - A Damage Control Model for Reinforced Concrete Pier Columns Based on Pre-Damage Tests under Cyclic Reverse Loading
T2  - Structural Durability \& Health Monitoring

PY  - 2025
VL  - 19
IS  - 2
SN  - 1930-2991

AB  - To mitigate the challenges in managing the damage level of reinforced concrete (RC) pier columns subjected to cyclic reverse loading, this study conducted a series of cyclic reverse tests on RC pier columns. By analyzing the outcomes of destructive testing on various specimens and fine-tuning the results with the aid of the IMK (Ibarra Medina Krawinkler) recovery model, the energy dissipation capacity coefficient of the pier columns were able to be determined. Furthermore, utilizing the calibrated damage model parameters, the damage index for each specimen were calculated. Based on the obtained damage levels, three distinct pre-damage conditions were designed for the pier columns: minor damage, moderate damage, and severe damage. The study then predicted the variations in hysteresis curves and damage indices under cyclic loading conditions. The experimental findings reveal that the displacement at the top of the pier columns can serve as a reliable indicator for controlling the damage level of pier columns post-loading. Moreover, the calibrated damage index model exhibits proficiency in accurately predicting the damage level of RC pier columns under cyclic loading.
KW  - Reinforced concrete pier; cyclic reverse load; pre-damage; damage index; displacement control

DO  - 10.32604/sdhm.2024.054671