Nonlinear stress–strain behavior of corrosion-damaged reinforcing bars including inelastic buckling

DOI

10.2991/icadme-17.2017.56How to use a DOI?

Keywords

corroded, pits, capacity, nonlinear buckling.

Abstract

Corrosion of reinforcement is the most common type of deterioration of reinforced concrete structures and bridges. Serious degradation of the mechanical properties of reinforcing bars is because of corrosion. Pitting corrosion is the main form of corrosion. The nonlinear stress–strain behavior of corroded reinforcing bars has been investigated by finite element theory. The effect of different corrosion levels on the compression behavior of bars with different slenderness ratios is presented. It was found that the softening of compressive stress takes place due to the geometrical nonlinearity associated with the lateral deformation of the compressed bars, especially after the absolute strain exceeds the yielding strain. Degradation of longitudinal reinforcement bearing capacity which was caused by pit sizes, pit locations, pit types, and slenderness ratios was analyzed. The results of this study show that slenderness ratio and pit depth significantly affect changes the buckling collapse mechanism of the bars in compression. Moreover, a unique relationship between pit size and the carrying capacity of reinforcing bars including the effect of buckling is established through various parametric analyses.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Mingqiang Lin
AU  - Fengjuan Dai
AU  - Jiatao Li
PY  - 2017/07
DA  - 2017/07
TI  - Nonlinear stress–strain behavior of corrosion-damaged reinforcing bars including inelastic buckling
BT  - Proceedings of the 2017 7th International Conference on Advanced Design and Manufacturing Engineering (ICADME 2017)
PB  - Atlantis Press
SP  - 288
EP  - 291
SN  - 2352-5401
UR  - https://doi.org/10.2991/icadme-17.2017.56
DO  - 10.2991/icadme-17.2017.56
ID  - Lin2017/07
ER  -