Work

Prediction model for development length of corroded prestressing strand considering rotation-affected bond failure mechanism

Year: 2026

Type: article

Abstract: Evaluation of corrosion’s effect on the development length of prestressing strand is crucial for pretensioned prestressed concrete structures serving in the aggressive environment. This paper presents an analytical model for predicting the development length of corroded prestressing strand, in which the effects of strand corrosion on the transfer length and flexural bond length are considered separately. The effect of corrosion on the initial prestressing transfer length is analyzed by considering the combined effects of initial releasing cracking and subsequent corrosion-induced cracking on the evolution of confinement around the prestressing strand. Thereafter, beyond the transfer stage, the effect of strand corrosion on the additional flexural bond length is confirmed based on the calculation of maximum bond strength for various corrosion degrees, in which the effect of strand rotation along its axis is considered for the pull-out failure mode in a well-confined condition. Comparison of analytical and experimental results shows that this model can reasonably predict the development length of corroded prestressing strand.

Source: KSCE Journal of Civil Engineering

DOI: 10.1016/j.kscej.2026.100505

Authors: Ju Yi, Lei Wang, Ming Deng, Guodong Wang

Institutions: Changsha University, Changsha University of Science and Technology

Language: English

Topic: Concrete Corrosion and Durability

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,800

Funders: National Natural Science Foundation of China, Natural Science Foundation of Hunan Province, National Science Fund for Distinguished Young Scholars