Modeling Corrosion Progress of Steel Wires in External Tendons

Yoo, Chul‐Gyu; Park, Yeun Chul; Kim, Ho-Kyung

doi:10.1061/(asce)be.1943-5592.0001331

Cited by 12 publications

(9 citation statements)

References 16 publications

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“…As the main source of crack‐initiation sites, the corrosion pits on the fracture morphologies were measured to detect the effect of etch pits on the corrosion fatigue behaviour of the corroded wires. As illustrated in Figure 13A, depths and lengths of the corrosion pits were extracted from their two‐dimensional models 36 . The corrosion pit depth (i.e., a ) was defined as the maximum radial distance from the current corroded surface of the initiation site to the original surface of a wire.…”

Section: Resultsmentioning

confidence: 99%

“…As illustrated in Figure 13A, depths and lengths of the corrosion pits were extracted from their two-dimensional models. 36 The corrosion pit depth (i.e., a) was defined as the maximum radial distance from the current corroded surface of the initiation site to the original surface of a wire. The corrosion pit length (i.e., b) was half of the length between the two intersections of the corrosion front and the wire perimeter.…”

Section: Multiple Corrosion Pitsmentioning

confidence: 99%

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Corrosion fatigue and electrochemical behaviour of steel wires used in bridge cables

Liu

Guo

et al. 2020

Fatigue Fract Eng Mat Struct

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In-service bridge wires often fail prior to the design life subjected to alternating stresses and environmental erosion. In this paper, a novel corrosion fatigue test device, integrating fatigue testing machine and electrochemical accelerated corrosion assemblies, was developed to characterize the corrosion fatigue and electrochemical behaviour of the wires. Using the developed device, corrosion fatigue tests of corroded bridge wires under different corrosion and loading conditions were conducted. Electrochemical characteristics, corrosion fatigue behaviour, failure mechanism, and so forth were investigated according to electrochemical measurements, fracture morphologies and the lifetime of wires. Results evidence the synchronization of corrosion and fatigue and show the accelerated corrosion due to static and fatigue stresses. Additionally, cracking and fracture induced by multiple crack initiation was dominant in corrosion fatigue of corroded wires, and the coexistence of multiple corrosion pits decreased the lifetime significantly.

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Section: Resultsmentioning

confidence: 99%

Section: Multiple Corrosion Pitsmentioning

confidence: 99%

Corrosion fatigue and electrochemical behaviour of steel wires used in bridge cables

Liu

Guo

et al. 2020

Fatigue Fract Eng Mat Struct

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“…It is widely known that the corrosion phenomenon in strands is a major cause of the reduction in the load carrying capacity and serviceability of PSC girder bridges (Nakamura and Suzumura 2013;Lau and Lasa 2013;Sajedi et al 2017). Similar incidents have occurred in many areas of the world, including France, the UK, the United States, and Japan (Cullington et al 2001;fib 2006;SMFMC 2017;Yoo et al 2018). Therefore, it is essential to monitor and consider the corrosion of strands in estimating the strength during the service life of a PSC girder bridge.…”

Section: Introductionmentioning

confidence: 99%

Time-Dependent Reliability Assessment and Updating of Post-tensioned Concrete Box Girder Bridges Considering Traffic Environment and Corrosion

Kim

Song

2021

ASCE-ASME J. Risk Uncertainty Eng. Syst., Part A: Civ. Eng.

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In the reliability assessment of a bridge in operation with regards to its ultimate limit state, it should be noted that the strengths of members and effects of traffic load vary continuously over its lifespan due to the structural deterioration and changes of the traffic environment, respectively. Therefore, it is essential to collect relevant data, and incorporate the extracted information into a time-dependent reliability analysis. However, previous studies have not considered both traffic load effects and material deterioration models in timedependent reliability assessment for prestressed concrete (PSC) box girder bridges. To overcome this limitation and assess the reliability efficiently, this paper presents a comprehensive framework for time-dependent reliability assessment of post-tensioned concrete box girder bridges that can consider the traffic environment change and the corrosion in steel strands. The proposed framework employs probabilistic models and methods to estimate the flexural strengths and traffic load effects of a PSC box girder over time based on (1) corrosion-related data collected in the current practice of structure safety inspection, and (2) the traffic environment data obtained through weigh-in-motion (WIM) devices and traffic investigation. The time-dependent reliability is then computed using structural reliability methods based on the estimated strengths and load effects. As a numerical example, the time-dependent reliability of the PSC box girder of an actual cable-stayed bridge, Hwayang-Jobal Bridge in South Korea, is evaluated using the proposed framework. It is demonstrated that the framework can effectively assess the time-dependent reliability of a bridge in operation based on the uncertainties in the traffic environment and corrosion, and update it through data obtained by monitoring and inspection.

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“…According to the literature reports [1][2][3], several bridges are suffering performance degradation caused by the corrosion of the external steel strands. For instance, the Bickton Meadows Bridge and two other post-tensioned bridges in the United Kingdom collapsed due to corrosion in prestressing tendons [4]. Severe corrosion in prestressing tendons has also been detected in bridges in the United States [5].…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of UHPC Beams Prestressed with External CFRP Tendons

Fang

Huang

et al. 2021

Applied Sciences

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This paper presents an experimental investigation on the flexural behavior of ultra-high-performance concrete (UHPC) beams prestressed with external carbon fiber-reinforced polymer (CFRP) tendons. A total of eight T-shaped beam specimens were fabricated and tested, and the effects of the effective prestressing stress, partial prestressing ratio, deviated angle, and loading condition on the flexural behavior were analyzed. The experimental results indicate that the fully prestressed beams experienced a brittle failure, and the shear capacity of these beams was mainly controlled by the effective prestressing stress in CFRP tendons and the ultimate tensile strength of UHPC, whereas the partially prestressed beams failed in a ductile manner. The presence of internal steel reinforcement could significantly improve the flexural capacity and deformation ability. Thus, internal reinforcements should not be omitted from UHPC beams with CFRP tendons. A higher effective prestressing stress resulted in enhanced cracking load and flexural capacity. The deviated angle enhanced the utilization efficiency of high strength CFRP tendons. The loading condition exerted a slight influence on the flexural behavior of the specimens. Moreover, a method considering the effect of steel fibers was proposed and verified to predict the flexural capacity of UHPC beams prestressed with external CFRP tendons.

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Modeling Corrosion Progress of Steel Wires in External Tendons

Cited by 12 publications

References 16 publications

Corrosion fatigue and electrochemical behaviour of steel wires used in bridge cables

Corrosion fatigue and electrochemical behaviour of steel wires used in bridge cables

Time-Dependent Reliability Assessment and Updating of Post-tensioned Concrete Box Girder Bridges Considering Traffic Environment and Corrosion

Flexural Behavior of UHPC Beams Prestressed with External CFRP Tendons

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