Fatigue life prediction for aging RC beams considering corrosive environments

Ma, Yafei; Xiang, Yibing; Wang, Lei; Zhang, Jianren; Liu, Yongming

doi:10.1016/j.engstruct.2014.07.039

Cited by 97 publications

(31 citation statements)

References 45 publications

(55 reference statements)

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“…where D is the damage degree of the test beam, D 1 is the damage degree of the test beam due to freeze-thaw cycles, and D 2 is the damage degree of the test beam due to loading cycles. According to the theory of damage mechanics, the dynamic elastic modulus is used as a damage factor to define the degree of freeze-thaw damage D 1 as follows [41]:…”

Section: Establishment Of Damage Model Under Saltmentioning

confidence: 99%

“…In this paper, only the second stage of fatigue life prediction is considered, and it is considered that the life of the second stage can approximately represent the whole life of the component. e treatment method is more conservative [41], but because of the seriousness of fatigue failure in engineering problems, it needs more conservative design ideas.…”

Section: Experimental Prediction Formula For Fatigue Lifementioning

confidence: 99%

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Experimental Study on Flexural Fatigue Properties of Reinforced Concrete Beams after Salt Freezing

Yang

Zhang

Sun

2020

Advances in Materials Science and Engineering

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In order to study the fatigue behavior decay law of reinforced concrete structures in cold region under the action of chlorine salt and freeze-thaw, 150-time water freeze-thaw and salt freeze-thaw cycles of reinforced concrete beams were carried out by the quick freezing method, and then the fatigue properties of the test beams were obtained by the four-point bending fatigue test. The fatigue life of the test beam without freeze-thaw is 1,074,282 times, and the fatigue life of the test beam after freeze-thaw is reduced; the minimum fatigue life of fatigue failure is 493,972. The test results show that the residual deflection of the test beam is similar to the relative dynamic elastic modulus, which accords with the damage and failure mechanism of concrete, and the growth rate of residual deflection accords with the law of the block model. The fatigue damage model of reinforced concrete specimens is established, the nonlinear fitting of the damage model is carried out according to the test data, the fitting correlation coefficient is more than 0.98, which indicates that the model can better reflect the damage degree of concrete, and the method of predicting the life of in-service concrete beam is put forward in combination with the concrete damage model.

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Section: Establishment Of Damage Model Under Saltmentioning

confidence: 99%

Section: Experimental Prediction Formula For Fatigue Lifementioning

confidence: 99%

Experimental Study on Flexural Fatigue Properties of Reinforced Concrete Beams after Salt Freezing

Yang

Zhang

Sun

2020

Advances in Materials Science and Engineering

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“…The influence of both degrading processes on the bond of reinforced concrete elements is also studied (FANG et al, 2006). Few studies focus on reliability and life prediction analysis of corroded fatigued elements (ZHANG et al, 2017;MA et al, 2014;MAES;WEI;DILGER, 2001).…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis on the combined effects of corrosion and fatigue in reinforced concrete beams

Stein

Graeff

2019

Ambient. constr.

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nfrastructure elements, especially reinforced concrete bridges and viaducts, are exposed to a combination of degrading processes throughout their life cycle, such as corrosion and fatigue. The combined effects of both processes are known to be more harmful to the structure than the sum of both deterioration processes considered individually. Due to the limited amount of studies in this field, this research aims to evaluate, by experimental analysis, the combined effects of fatigue and corrosion on reinforced concrete beams. Eight beams measuring 7 x 14 x 130 cm were cast and divided in four groups of 2 beams each: one group for reference beams, one for corroded beams with a loss of mass of 10%, one for beams subjected to 200,000 cycles and the last for corroded fatigued beams. The results show that the combined processes drastically reduce the load capacity of the beams by less than half compared to the reference beams. It was also observed that fatigue life decreased and the failure mode changed to fragile.

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“…1 Great progresses have been made on investigations of the bridge fatigue behavior in recent years. Ma et al 7 proposed a new crack-growth-based corrosion fatigue life prediction method for aging reinforced concrete (RC) beams. Characteristic stress-life (S-N) curves were proposed by Ghahremani et al 8 for the fatigue design of treated welds under variable amplitude loading in the high cycle domain.…”

Section: Introductionmentioning

confidence: 99%

Lifetime fatigue reliability evaluation of short to medium span bridges under site-specific stochastic truck loading

Yan

Luo

Yuan

et al. 2017

Advances in Mechanical Engineering

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Bridges are vulnerable to the fatigue damage accumulation caused by traffic loading over the service period. A continuous growth in both the vehicle weight and the traffic volume may cause a safety hazard to existing bridges. This study presented a computational framework for probabilistic modeling of the fatigue damage accumulation of short to medium span bridges under actual traffic loading. Stochastic truck-load models were simulated based on site-specific weigh-inmotion measurements. A response surface method was utilized to substitute the time-consuming finite element model for an efficient computation. A case study of a simply supported bridge demonstrated the effectiveness of the computational framework. Numerical results show that the simulated fatigue stress spectrum captures the probability density functions of the heavy traffic loading. The equivalent fatigue stress range increases mostly linearly in the good road roughness condition with the growth of the gross vehicle weight. The vehicle type and the road roughness condition affect the stress range. The influence of the driving speed on the equivalent stress range is non-monotonic. The bridge fatigue reliability has a considerable increase even under a relatively high overload limit. It is anticipated that the proposed computational framework can be applied for more types of bridges.

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Fatigue life prediction for aging RC beams considering corrosive environments

Cited by 97 publications

References 45 publications

Experimental Study on Flexural Fatigue Properties of Reinforced Concrete Beams after Salt Freezing

Experimental Study on Flexural Fatigue Properties of Reinforced Concrete Beams after Salt Freezing

Experimental analysis on the combined effects of corrosion and fatigue in reinforced concrete beams

Lifetime fatigue reliability evaluation of short to medium span bridges under site-specific stochastic truck loading

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