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Deformation capacity of FRP retrofitted reinforced concrete columns with corroded reinforcing bars

Deformation capacity of FRP retrofitted reinforced concrete columns with corroded reinforcing bars

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DOI	https://doi.org/10.1016/j.engstruct.2021.113834
刊名	Engineering Structures
年，卷(期)	2022, (113834)
作者	Kuang-Yu Dai, Xiao-Hui Yu , Kai Qian, Dai-Yu Wang,
作者单位	1.School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China 2.College of Civil Engineering and Architecture, Guilin University of Technology, Guilin 541004, China 3.Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China
摘要	FRP retrofitting is an effective way to promote the degraded seismic capacity of reinforced concrete (RC) columns with corroded reinforcing bars. It is important to evaluate whether the performance of a corroded RC column meets the requirement of safety after FRP retrofitting. However, there is little available guidance for evaluating the deformation capacity of FRP retrofitted corroded columns. In this study, the test data of 63 FRP retrofitted corroded columns and 17 FRP retrofitted uncorroded columns under repeated cyclic loads are collected to establish a database. For each specimen, the rotation angles at yielding and ultimate states are determined from the backbone curve. The empirical prediction models are then developed for the yield and ultimate rotation angles of FRP retrofitted corroded columns, which include two parts: 1) the predicted rotation angle for the FRP retrofitted uncorroded RC column, and 2) a Corrosion Influence Factor (CIF) defined as the ratio between the rotation angles of the FRP retrofitted corroded columns to that of the FRP retrofitted uncorroded ones. The former part is represented using the available empirical prediction models, whereas the latter part is represented using the multi-linear relationships through stepwise regression with a backward elimination procedure. Through comparing with the experimental data, the developed empirical prediction models for the yield and ultimate rotation angles of FRP retrofitted corroded columns provide sufficient accuracy. Finally, the parameter “a” is determined in corresponding to different target probability of exceedance, which is required by the ASCE 41-compliant force versus displacement relation for FRP retrofitted corroded RC columns.
Abstract	FRP retrofitting is an effective way to promote the degraded seismic capacity of reinforced concrete (RC) columns with corroded reinforcing bars. It is important to evaluate whether the performance of a corroded RC column meets the requirement of safety after FRP retrofitting. However, there is little available guidance for evaluating the deformation capacity of FRP retrofitted corroded columns. In this study, the test data of 63 FRP retrofitted corroded columns and 17 FRP retrofitted uncorroded columns under repeated cyclic loads are collected to establish a database. For each specimen, the rotation angles at yielding and ultimate states are determined from the backbone curve. The empirical prediction models are then developed for the yield and ultimate rotation angles of FRP retrofitted corroded columns, which include two parts: 1) the predicted rotation angle for the FRP retrofitted uncorroded RC column, and 2) a Corrosion Influence Factor (CIF) defined as the ratio between the rotation angles of the FRP retrofitted corroded columns to that of the FRP retrofitted uncorroded ones. The former part is represented using the available empirical prediction models, whereas the latter part is represented using the multi-linear relationships through stepwise regression with a backward elimination procedure. Through comparing with the experimental data, the developed empirical prediction models for the yield and ultimate rotation angles of FRP retrofitted corroded columns provide sufficient accuracy. Finally, the parameter “a” is determined in corresponding to different target probability of exceedance, which is required by the ASCE 41-compliant force versus displacement relation for FRP retrofitted corroded RC columns.
关键词	Deformation capacity；Nonlinear modeling parameter；FRP；Corrosion；RC column
KeyWord	Deformation capacity；Nonlinear modeling parameter；FRP；Corrosion；RC column
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引用本文

Kuang-Yu Dai, Xiao-Hui Yu , Kai Qian, Dai-Yu Wang. Deformation capacity of FRP retrofitted reinforced concrete columns with corroded reinforcing bars [J]. Engineering Structures. 2022; ; (113834). - .

文献评论

2026-06-16 08:14:16西部**

研究方法不错，结果比较可靠。

2025-12-23 09:16:42余**重庆科技******已认证✔

本篇论文结构清晰、数据扎实、工程价值很高。研究聚焦于既有锈蚀钢筋混凝土柱经过FRP加固后的变形能力评估，切中当前城市更新、老旧建筑抗震加固的工程通电，尤其是在高腐蚀、高地震风险地区，具有显著的工程价值。作者整合了80组实验数据，以FRP材料、截面形式、腐蚀成都和加载方式为参数，数据覆盖面广，为模型的建立奠定了坚实的基础。通过引入锈蚀影响因子将问题拆分为“未锈蚀FRP柱变形能力”与“锈蚀影响”两部分，分别建模再耦合，逻辑非常清晰。最终模型输出直接与ASCE 41规范中的非线性参数a对接，明确了不同安全等级下的建议取值，便于工程师直接使用，具有较强的规范适配性。

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