Prediction of Reinforcement Corrosion in Concrete and Its Effects on Concrete Cracking and Strength Reduction

2008 ◽  
Vol 105 (1) ◽  
Keyword(s):  
Strength Reduction ◽  
Reinforcement Corrosion ◽  
Concrete Cracking

Effect of transverse reinforcement corrosion on compressive strength reduction of stirrup-confined concrete: an experimental study

Sadhana ◽  
2020 ◽  
Vol 45 (1) ◽  
Author(s):  
Ali Goharrokhi ◽  
Jamal Ahmadi ◽  
Mohsen Ali Shayanfar ◽  
Mohammad Ghanooni-Bagha ◽  
Kiarash Nasserasadi
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
Strength Reduction ◽  
Confined Concrete ◽  
Transverse Reinforcement ◽  
Reinforcement Corrosion

scholarly journals Concrete Protective Layer Cracking Caused by Non-Uniform Corrosion of Reinforcements

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4245 ◽  
Author(s):  
Lu Zhang ◽  
Ditao Niu ◽  
Bo Wen ◽  
Daming Luo
Keyword(s):  
Radial Displacement ◽  
Concrete Strength ◽  
Protective Layer ◽  
Concrete Cover ◽  
Uniform Corrosion ◽  
Reinforcement Corrosion ◽  
Concrete Cracking ◽  
Principal Tensile Stress ◽  
Cover Thickness ◽  
Corrosion Of Steel

The volume expansion of reinforcement corrosion products resulting from the corrosion of steel reinforcement embedded into concrete causes the concrete’s protective layer to crack or spall, reducing the durability of the concrete structure. Thus, it is necessary to analyze concrete cracking caused by reinforcement corrosion. This study focused on the occurrence of non-uniform reinforcement corrosion in a natural environment. The characteristics of the rust layer were used to deduce the unequal radial displacement distribution function of concrete around both angular and non-angular bars. Additionally, the relationship between the corrosion ratio and the radial displacement of the concrete around the bar was established quantitatively. Concrete cracking due to the non-uniform corrosion of reinforcements was simulated using steel bars embedded in concrete that were of uneven displacement because of rust expansion. The distribution of the principal tensile stress around the bar was examined. A formula for calculating the critical radial displacement at the point when cracking began was obtained and used to predict the corrosion ratio of the concrete cover. The determined analytical corrosion ratio agreed well with the test result. The effect factor analysis based on the finite element method indicated that increasing the concrete strength and concrete cover thickness delays concrete cracking and that the adjacent rebar causes the stress superposition phenomenon.

scholarly journals Damage Evolution of RC Beams Under Simultaneous Reinforcement Corrosion and Sustained Load

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 627 ◽  
Author(s):  
Jiansheng Shen ◽  
Xi Gao ◽  
Bo Li ◽  
Kun Du ◽  
Ruoyu Jin ◽  
...  
Keyword(s):  
Damage Evolution ◽  
Coupling Effect ◽  
Element Model ◽  
Sustained Load ◽  
Rc Beams ◽  
Reinforcement Corrosion ◽  
Concrete Cracking ◽  
Damage Level ◽  
Temperature Filed ◽  
Different Levels

To accurately obtain the performance of concrete structures in coastal regions, it is necessary to correctly understand the damage evolution law of reinforced concrete (RC) members under real working conditions. In this paper, four RC beams, subjected to different levels of corrosion and sustained load, are first tested. Reinforcement corrosion coupled with sustained load increases the number and width of cracks at the soffit of beams but decreases their loading capacities. Crack width of the corroded beam under 50% of designed load is two times of that under 30% of designed load. Residual loading capacities of the corroded beams subjected to 30% and 50% of designed load are 87.5% and 81.8% of the control beam. A finite element model is developed for the corroded RC beams. Due to less confinement, concrete below and at the sides of reinforcements is subjected to a higher stress, compared to concrete above the reinforcements. Corrosion expansion of reinforcements is successfully modelled by a temperature-filed method, as it properly simulates the damage evolution of the corroded RC beams. As a result, concrete cracking, caused by the reinforcement corrosion, is well captured. Coupling reinforcement corrosion with sustained load significantly increases the damage level in RC beams, particularly for those subjected to a high sustained load. The whole damage evolution process of concrete cracking due to corrosion expansion under the coupling effect of sustained loading and environment can be simulated, thus providing a reference for the durability evaluation, life prediction, and numerical simulation of concrete structure.

CRACKING PROCESS OF REINFORCED CONCRETE INDUCED BY NON-UNIFORM REINFORCEMENT CORROSION

2017 ◽  
Vol 79 (3) ◽  
Author(s):  
Wahyuniarsih Sutrisno ◽  
I Ketut Hartana ◽  
Priyo Suprobo ◽  
Endah Wahyuni ◽  
Data Iranata
Keyword(s):  
Finite Element ◽  
Numerical Modeling ◽  
Experimental Test ◽  
Accurate Result ◽  
Uniform Corrosion ◽  
Reinforcement Corrosion ◽  
Lower Stress ◽  
Concrete Cracking ◽  
Cracking Pattern ◽  
Cracking Process

Expansion of rust, as a result of reinforcement corrosion, can cause additional internal expansive pressure and initiate cracking to the concrete. This paper presents experimental test and numerical modeling of concrete cracking induced by reinforcement corrosion. The simulation was performed using finite element based program Abaqus CAE using concrete smeared cracking approach. The numerical modeling used non-uniform and uniform corrosion assumption to get more accurate result. Based on the result, the numerical modeling has 3.01% lower stress than the experimental test. The result of the simulation using non-uniform assumption showed more similar cracking pattern with the experimental test compared with uniform assumption. 

Discussion on Anchor Structures’ Deterioration Analysis Parameter Caused by Reinforcement Corrosion under Erosion Environment Condition

2012 ◽  
Vol 268-270 ◽  
pp. 827-830
Author(s):  
Wan Tao Ding ◽  
Jin Hui Liu ◽  
Shu Cai Li
Keyword(s):  
Finite Element ◽  
Mechanical Performance ◽  
Strength Reduction ◽  
Reinforcement Corrosion ◽  
Reinforcing Bars ◽  
Underground Engineering ◽  
Support Structure ◽  
Cross Sectional ◽  
Bond Performance

Because of long-term chloride erosion and alternate drying-wetting effect, anchorage support structure of underground engineering is liable to reinforced corrosion and its strength is decreased. According to previous research theory and test results, reinforced corrosion to deteriorate load-bearing role of anchorage support structure system is studied by means of numerical analysis FLAC3D and idea of finite element strength reduction. The results are as follows: (1) losses in the anchor structural performance in underground engineering with corroded reinforcements are caused by three factors: losses in the effective cross-sectional area of anchoring body, losses in the mechanical performance of reinforcing bars and losses in the bond performance of anchoring body. (2) Based on reinforcement mechanical model in FLAC3D, deterioration of mechanical performance of anchor structures caused in underground engineering was analyzed due to reinforcement corrosion. And according to idea of finite element strength reduction and results of laboratory test, deterioration analysis parameter caused by corrosion can be reduced accordingly. The research results can provide the theory support to analyze corrosion deterioration of anchor structure in underground engineering using numerical simulation.

Life-cycle modelling of concrete cracking and reinforcement corrosion in concrete bridges: A case study

2021 ◽  
Vol 237 ◽  
pp. 112143
Author(s):  
Shilun Chen ◽  
Colin Duffield ◽  
Saeed Miramini ◽  
Babar Nasim Khan Raja ◽  
Lihai Zhang
Keyword(s):  
Life Cycle ◽  
Concrete Bridges ◽  
Reinforcement Corrosion ◽  
Concrete Cracking
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