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Open Access

ARTICLE

A Damage Control Model for Reinforced Concrete Pier Columns Based on Pre-Damage Tests under Cyclic Reverse Loading

Zhao-Jun Zhang1, Jing-Shui Zhen1, Bo-Cheng Li1, De-Cheng Cai1, Yang-Yang Du1, Wen-Wei Wang2,*
1 Offshore Oil Engineering Co., Ltd., Tianjin, 300461, China
2 Department of Bridge Engineering, School of Transportation, Southeast University, Nanjing, 21189, China
* Corresponding Author: Wen-Wei Wang. Email: email
(This article belongs to the Special Issue: Sensing Data Based Structural Health Monitoring in Engineering)

Structural Durability & Health Monitoring https://doi.org/10.32604/sdhm.2024.054671

Received 04 June 2024; Accepted 10 September 2024; Published online 06 November 2024

Abstract

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.

Keywords

Reinforced concrete pier; cyclic reverse load; pre-damage; damage index; displacement control

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