Work

Hysteretic behavior of pitting-corroded concrete-filled steel tube columns with different strengthened approaches

Year: 2026

Type: article

Abstract: This study presents an experimental and numerical investigation of the hysteretic behavior of pitting-corroded concrete-filled steel tube (CFST) columns and the efficacy of two reinforcement methods: Carbon Fiber Reinforced Polymer (CFRP) wrapping and Ultra-High-Performance Concrete (UHPC) encasement. Eleven column specimens were tested under constant axial compression and cyclic lateral loading. The influence of pitting corrosion depth and reinforcement type on the failure modes, load-carrying capacity, stiffness, and energy dissipation was examined. Validated numerical analyses were conducted to investigate load transfer mechanisms and perform parametric studies on key geometric and material properties. Based on the findings, modified design equations were developed to predict the load-carrying capacity of corroded and reinforced CFST columns. The results demonstrate that CFRP wrapping exhibits superior performance in enhancing specimen ductility, while UHPC encasement demonstrates significant effectiveness in restoring load-carrying capacity, with capacity and stiffness values exceeding those of the original un-corroded specimen. The findings provide a reliable basis for the seismic assessment and design of repaired CFST columns in corrosive environments.

Source: Structures

DOI: 10.1016/j.istruc.2026.111148

Authors: Feiyu Liao, Yucheng Cui, Yuxing Yang, Muxin Lin, Ying Wang

Institutions: Fujian Agriculture and Forestry University, Fuzhou University

Language: English

Topic: Structural Load-Bearing Analysis

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: hybrid

Estimated APC paid: $3,510