Seismic fragility analysis of deteriorating RC bridge substructures subject to marine chloride-induced corrosion

Cui, Fengkun; Zhang, Haonan; Ghosn, Michel; Xu, Yue

doi:10.1016/j.engstruct.2017.10.067

Cited by 102 publications

(62 citation statements)

References 44 publications

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“…The OpenSEES analysis platform can be used for structural modal analysis, section analysis, static linear elastic analysis, dynamic nonlinear analysis, and the sensitivity and reliability analysis of structural systems in earthquake [22][23][24]. In this paper, a finite element model of bridge is established based on OpenSEES platform.…”

Section: The Establishment Of Nonlinear Finite Element Model Based Onmentioning

confidence: 99%

“…From (13)- (22) and Figures 9 and 10, it can be seen that corrosion of stirrups in concrete occurs earlier than longitudinal reinforcements, because stirrups are close to the concrete surface and they are more susceptible to chloride ions. In addition, the diameter, yield strength, and elastic modulus of longitudinal reinforcement and stirrup in C50 and C40 concrete both decrease with the increase of service time.…”

Section: Corrosion Time and Mechanical Properties Of Reinforcingmentioning

confidence: 99%

“…Alipour et al [21] study the life-cycle performance and cost of reinforced concrete highway bridges subjected to earthquake ground motions when they are continuously exposed to the attack of chloride ions and provide a multihazard framework that will achieve more realistic performance and cost estimates. Cui et al [22] present an improved reinforced concrete reinforcing steel bar deterioration model that incorporates pitting corrosion and considers the change in after-cracking corrosion rate to assess the time-dependent seismic fragility of RC bridge substructures in marine environments. The calculated time-dependent fragility curves indicate that there is a nonlinear accelerated growth of RC column vulnerability along the service life of highway bridges, especially after twenty-five years' exposure to chlorides.…”

Section: Introductionmentioning

confidence: 99%

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Analysis on the Time-Varying Fragility of Offshore Concrete Bridge

et al. 2019

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For offshore bridges, the most prominent problem in the whole life cycle is that it is in an earthquake prone zone and an offshore corrosion environment at the same time. A nonlinear dynamic analysis model is set up for an offshore multispan and continuous rigid frame bridge based on the OpenSEES platform. The fragility surface of the bridge pier, bearing, bridge platform, and system are established by selecting a reasonable damage constitutive model of the material durability and a damage index analysis that studies the damage of the bridge durability to time-varying seismic fragility of bridge components and the system of the whole life cycle in offshore environment. The results show that the durability damage will lead to a constant decline in seismic capacity of the pier and an increase of the seismic demand under earthquake action as well as the probability to reach the ultimate failure state; compared to high piers, a low pier is more vulnerable to the offshore corrosion environment; the seismic fragility of bridge platform is higher than that of simply bearing; and the influence of offshore corrosion on environment is relatively large. With the prolongation of service period, the effect of durability damage on the seismic fragility of bridge system cannot be ignored in the coastal environment and it is necessary to make a reasonable evaluation on the seismic fragility of bridge structure during the whole life period.

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Section: The Establishment Of Nonlinear Finite Element Model Based Onmentioning

confidence: 99%

Section: Corrosion Time and Mechanical Properties Of Reinforcingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis on the Time-Varying Fragility of Offshore Concrete Bridge

et al. 2019

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“…More recently, several researchers have studied the influence of corrosion on seismic performance, fragility and the life-cycle cost analysis of deteriorating structures and bridges (Stewart , 2004;Choe et al 2008;Berto et al 2009; Ghosh and Padgett 2010;Choe et al 2009;Akiyama et al 2011;Simon et al 2010;Akiyama and Frangopol 2013;Alipour et al 2011;Biondini et al 2014,Ou et al 2013, Guo et al, 2015aNi Choine et al, 2016;Rao et al, 2016b;Ghosh et al, 2016;Cui et al, 2018). The results of these studies showed that corrosion significantly affects the seismic vulnerability of RC structures and bridges.…”

Section: Introductionmentioning

confidence: 99%

Residual Capacity of Corroded Reinforced Concrete Bridge Components: State-of-the-Art Review

Kashani

Maddocks

Dizaj³

2019

J. Bridge Eng.

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The current paper provides a comprehensive review of experimental studies on corrosion damaged reinforced concrete (RC) components, and the ability of current state-of-the-art numerical models to predict the residual capacity of these corroded RC components. The experimental studies on corroded RC components are classified into five different categories including: (i) beams in flexure, (ii) beams in shear, (iii) columns under pure axial compression, (iv) circular columns in flexure, and (v) rectangular columns in flexure. For each group, a summary of all the previous research are provided. Through the regression analyses, the experimental results of each abovementioned groups are used to examine the adverse effect of corrosion on ductility and, flexural, shear, and axial capacity loss of the corroded RC components. Finally, the observed results of the previous experimental studies are compared with the predicted values using the state-of-the-art numerical models currently available in the literature. The summarised experimental results show that corrosion has much more adverse impact on ductility of the RC columns than strength. However, the effect of corrosion on ductility and strength reduction of RC beams is the same. Moreover, results of cross-sectional moment-curvature analyses using the state-of-the-art corrosion damage models show a good correlation between the predicted residual flexural capacity and observed experimental results. Finally, the existing shortcomings in the literature and open issues to be addressed in the future research are discussed, and some recommendations are provided.

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“…For example, in the Duracrete report, a simplified 1D diffusion mathematical model considering the environment, test, and execution factors into diffusion coefficients was adopted as the basic model in durability design [5]. This diffusion model in the Duracrete report is also widely used to predict the time to corrosion initiation of RC structure subject to chloride corrosion [6,7]. Costa and Appleton [8] modified the model considering the surface chloride concentration as time-dependent parameter.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Shape on Chloride Penetration of Circular Reinforcement Concrete Columns and Its Durability Design

Yin

Pan

2020

Applied Sciences

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The reinforced concrete (RC) circular element is usually simplified as slab one on the issue of chloride diffusion simulation, without considering the effect of the geometrical shape. In the paper, a modified slab diffusion model is proposed for circular section. A formulation for estimating the error caused by neglecting the effect of shape on chloride diffusion is derived. The formulation demonstrates that radius significantly affect the error. When shape is neglected, the effects of model parameters, including the diffusion coefficient, radius, cover concrete thickness and age factor, on the corrosion initiation time are investigated. The result shows the radius has a slight effect on calculating the corrosion initiation time compared with other model parameters. Furthermore, the influence of shape on estimating on reliability index for different service time is also discussed. A guideline is proposed for properly using the modified slab diffusion model instead of the original one to predict service life. Finally, the impact of the shape of the RC circular column on the durability design against chloride corrosion is studied. The design result when the column is simplified as a slab element indicates a lower required minimum concrete cover thickness. The minimum thickness should be improved by 5 mm as a conservative choice based on the result of the slab element.

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Seismic fragility analysis of deteriorating RC bridge substructures subject to marine chloride-induced corrosion

Cited by 102 publications

References 44 publications

Analysis on the Time-Varying Fragility of Offshore Concrete Bridge

Analysis on the Time-Varying Fragility of Offshore Concrete Bridge

Residual Capacity of Corroded Reinforced Concrete Bridge Components: State-of-the-Art Review

The Effect of Shape on Chloride Penetration of Circular Reinforcement Concrete Columns and Its Durability Design

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