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CLC number: TU375

On-line Access: 2014-07-08

Received: 2013-11-24

Revision Accepted: 2014-06-04

Crosschecked: 2014-06-24

Cited: 1

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Journal of Zhejiang University SCIENCE A 2014 Vol.15 No.7 P.496-507


Cover cracking model in reinforced concrete structures subject to rebar corrosion*

Author(s):  Zhi Wang1, Xian-yu Jin1, Nan-guo Jin1, Xiang-lin Gu2, Chuan-qing Fu2

Affiliation(s):  1. Department of Civil Engineering, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   jinng@zju.edu.cn

Key Words:  Reinforcement corrosion, Anisotropic damage, Analytical model, Concrete cover cracking

Zhi Wang, Xian-yu Jin, Nan-guo Jin, Xiang-lin Gu, Chuan-qing Fu. Cover cracking model in reinforced concrete structures subject to rebar corrosion[J]. Journal of Zhejiang University Science A, 2014, 15(7): 496-507.

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author="Zhi Wang, Xian-yu Jin, Nan-guo Jin, Xiang-lin Gu, Chuan-qing Fu",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Cover cracking model in reinforced concrete structures subject to rebar corrosion
%A Zhi Wang
%A Xian-yu Jin
%A Nan-guo Jin
%A Xiang-lin Gu
%A Chuan-qing Fu
%J Journal of Zhejiang University SCIENCE A
%V 15
%N 7
%P 496-507
%@ 1673-565X
%D 2014
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1300393

T1 - Cover cracking model in reinforced concrete structures subject to rebar corrosion
A1 - Zhi Wang
A1 - Xian-yu Jin
A1 - Nan-guo Jin
A1 - Xiang-lin Gu
A1 - Chuan-qing Fu
J0 - Journal of Zhejiang University Science A
VL - 15
IS - 7
SP - 496
EP - 507
%@ 1673-565X
Y1 - 2014
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1300393

A new cover cracking model is proposed for rebar corrosion. Rebar corrosion involves rust, which contributes to an expansive radial pressure at the concrete-steel interface and hoop tensile stresses in the surrounding concrete. Once the stress state exceeds a certain limit, anisotropic damage occurs. First, we establish an anisotropic damage model for concrete, which fully reflects the unilateral effect. Then an analytical model is proposed to calculate the displacement and the stress in a corroded reinforced concrete (RC) structural member based on that anisotropic damage. In this study, a concrete-rust-steel composite model is considered as a circular cylindrical concrete cover and a coaxial, uniformly-corroded, steel rebar, where the steel rebar and the mechanical properties of rust can be fully taken into account. At the same time, the influences of the steel-concrete interface pores and the cracks in concrete on the rust expansion pressure value are modeled. Finally, some experiments are made for comparison with the analytical results and good agreement indicated the proposed model could be used to predict both the variation of strain fields in structures during the corrosion process and the cover cracking time.




Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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