Investigation of Bond Behavior between Steel Bar and Concrete under Coupled Effect of Fatigue Loading and Corrosion

Jiang, Nan; Liu, Yang; Deng, Yang; Wang, Da; Lu, Naiwei; Yu, Feng

doi:10.1061/jmcee7.mteng-16113

Cited by 2 publications

(2 citation statements)

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“…The impact of crack formation and size on the structural integrity of a construction project is multifaceted. Some posit that minor cracks exert minimal influence on the structure, given that design standards permit concrete to crack under load, and there is no definitive correlation between crack width and steel corrosion [9,44]. Conversely, others propose that cracks enhance permeability to oxygen, chloride, sulfate, and water, thereby hastening corrosion in both steel and concrete, and diminishing the structure's rigidity and strength [1,3].…”

Section: Beyond the Scope Of This Studymentioning

confidence: 99%

“…Conversely, others propose that cracks enhance permeability to oxygen, chloride, sulfate, and water, thereby hastening corrosion in both steel and concrete, and diminishing the structure's rigidity and strength [1,3]. The effect of cracks on concrete structures is also associated with several factors such as the quality of concrete, thickness of the cover, environmental exposure, and load-bearing characteristics [3,44]. However, this study does not delve into various theories for determining crack width [28][45] [46], the impact of additional factors on crack propagation (such as concrete expansion and steel rust) [19], the implications of loading patterns on structures, and newly identified aspects related to the behavior of concrete with nonlinear properties not addressed by existing design standards [27,31].…”

Section: Beyond the Scope Of This Studymentioning

confidence: 99%

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An investigation of cracks caused by concrete shrinkage and temperature difference in common reinforced concrete bridge structures.

Nguyen

2024

Frattura Ed Integrità Strutturale

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Cracking phenomena commonly occur in reinforced concrete structures of bridge and culvert components. While some bridge design standards, such as the AASHTO LRFD standard from America, allow for the presence of cracks, they do not provide direct quantitative limits on permissible crack widths. This research analyzes the crack formation mechanism of reinforced concrete structures under the influence of shrinkage and temperature loading, using the "tension-chord" model from the fib MODEL CODE. The research findings demonstrate that despite the steel reinforcement adequately arranged to resist shrinkage and temperature, as per American bridge design standards, cracks frequently occur with widths that may exceed the allowable limits specified in the fib MODEL CODE. The main reason is the inadequate control of concrete construction temperature, especially for large-sized concrete structures. Other findings are: with the same steel ratio, using small diameter reinforcement can significantly reduce the crack width compared to larger ones; Increasing the steel ratio can reduce the crack width but increases the susceptibility to cracking; Crack does not occur immediately after maintenance completion but after a period ranging from several days to several months; Crack width due to concrete shrinkage and temperature changes is typically 0.3mm but may reaches to 0.7mm due to high hydration heat of large sizes structures.

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Section: Beyond the Scope Of This Studymentioning

confidence: 99%