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Updated: Nov 8, 2025

Applicability Analysis of Assessment Methods for Morphological Parameters of Corroded Steel Bars
Published on: November 1, 2018
Non-uniform model of relationship between surface strain and rust expansion force of reinforced concrete
Fan-Xiu Chen1, Yi-Chen Zhong2, Xin-Ya Gao2
1School of Science, Qingdao University of Technology, Fushun Road 11#, Qingdao, 266033, China. mecfx@163.com.
Abstract:
When operating within the environments rich with sodium chloride, steel bars of reinforced concrete structures are often subject to corrosion caused by surrounding erosive materials, and the associated rust expansion force due to corrosion takes a critical role in determining the durability of relevant reinforced concrete structures. By investigating the corrosion course of steel reinforcement with theory of elasticity, a numerical rust expansion model is established for the moment of concrete surface rupture based on non-uniform sin function. Cuboid reinforced concrete specimen with squared cross sections is tested to analyze the rust expansion when concrete cracks due to corrosive forces. The utility of the established expansion model is validated by numerical simulation with Abaqus through the comparison between the associated outcomes. The impacts of steel bar diameter and concrete cover thickness on the magnitude of rust expansion force are discussed.
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