RESEARCH ARTICLE
Fatigue of Reinforcing Steel Bars Subjected to Natural Corrosion
Shibin Li*, 1, 2, Weiping Zhang2, Xianglin Gu2, Cimian Zhu2
Article Information
Identifiers and Pagination:
Year: 2011Volume: 5
First Page: 69
Last Page: 74
Publisher ID: TOCIEJ-5-69
DOI: 10.2174/1874149501105010069
Article History:
Received Date: 19/8/2010Revision Received Date: 21/11/2010
Acceptance Date: 3/12/2010
Electronic publication date: 29/4/2011
Collection year: 2011
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Abstract
Under badly environmental conditions as well as complex loads, corrosion of embedded reinforcing steel bars in concrete is common for reinforced concrete (RC) structures. Fatigue of corrosion reinforcing steel bars is a key problem for old RC bridges. To assess the residual fatigue life of aged existing RC bridges, the most new study information on fatigue of natural corrosion reinforcement is analyzed, and axial tensile fatigue tests are conducted on fifteen naturally carbonation-induced corrosion steel bars. The fatigue test results indicate that the existence of corrosion pits reduces the fatigue life of steel bars significantly under the same fatigue stress; with the development of corrosion, the fatigue life of steel bars decays according to negative power exponent law approximately and the attenuation rate increases with stress level augment. For the complexity of fatigue and corrosion, further pertinent conclusions remain to be confirmed.