|
Title |
Proposal of Reduction Equation for the Tensile Strength of Corroded Prestressing Strands
|
|
Authors |
김태훈(Tae-Hoon Kim) ; 방춘석(Choon-Seok Bang) ; 김이현(Leehyeon Kim) ; 선창호(Chang-Ho Sun) ; 김익현(Ick-Hyun Kim) |
|
DOI |
https://doi.org/10.4334/JKCI.2025.37.5.581 |
|
Keywords |
강연선; 인장강도; 기계적 특성; Faraday 법칙; 감소식 prestressing strands; tensile strength; mechanical property; Faraday’s rule; reduction equation |
|
Abstract |
This work involved identifying and quantifying the corrosion characteristics of prestressing strands and examining the associated tensile strength reduction, a key mechanical property that significantly affects the durability and structural safety of deteriorated prestressed concrete structures. Using the charge passed through the proposed test circuit over a certain period, the expected corrosion level of the prestressing strand specimens was calculated based on Faraday’s rule. This quantification method was able to accurately predict the corrosion characteristics of the prestressing strands. Furthermore, monotonic tensile tests conducted on 64 accelerated-corroded strand specimens provided a reasonable reduction equation for tensile strength degradation. This equation provides a basis for modeling both the local and global behavior of corroded prestressing strands.
|