Title:
Assessment of Residual Flexural Capacity of Corroded Reinforced Concrete Members (Prepublished)
Author(s):
Harvinder Singh
Publication:
Structural Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
beam; concrete structures; corrosion; design methods and aids; residual strength
DOI:
10.14359/51749410
Date:
12/18/2025
Abstract:
Reinforced concrete members derive flexural strength from reinforcing steel, which acts together with the concrete to mobilize the required capacity. Design standards stipulate mandatory norms that must be complied with during the design process. Non-compliance with these provisions can increase the risk of corrosion, compromising the safety and integrity of the structure. Concrete protects the reinforcing steel against corrosion, but it can also become a contributing factor when its microstructure is poor due to non-compliance with these norms. Assessing the residual flexural capacity is essential for making informed decisions regarding repair or demolition. The proposed model in this paper enables computation of the reduction in flexural strength based either on gravimetric mass-loss percentage or on measured corrosion current density. A design chart is also proposed to facilitate practical application, enabling engineers to assess residual capacity and decide on repair or demolition.