Time-dependent reliability analysis for a set of RC T-beam bridges under realistic traffic considering creep and shrinkage

Chehade, Fatima El Hajj; Younès, Rafic; Mroueh, Hussein; Chehade, Fadi Hage

doi:10.1080/19648189.2021.1946720

Cited by 3 publications

(1 citation statement)

References 37 publications

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“…Saassouh and Lounis [44] used the first-order reliability method (FORM) and second-order reliability method (SORM) to predict the timedependent probability of a RC highway bridge deck. El Hajj Chehade et al [14] proposed a simplified time-dependent reliability model for a set of 21 simply supported RC T-beam bridges under variable traffic load considering the concrete creep and shrinkage. Some other related studies include Bagheri et al [5], Guo et al [20], Fan et al [17] and Yang and Li [65].…”

Section: Eksploatacja I Niezawodnosc -Maintenance and Reliabilitymentioning

confidence: 99%

Time-dependent reliability analysis of corroded RC beams based on the phase-type fitting method

Li,

Chen,

Zhang

et al. 2023

Eksploatacja i Niezawodność – Maintenance and Reliability

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It remains an important challenge to quantitatively describe the corrosion of reinforced concrete (RC) structures under chloride penetration. When considering the uncertainties encountered throughout the life cycle of RC structures exposed to a corrosive environment and evaluating their safety and reliability, the complexity of the problem intensifies. To address these issues, this paper focuses on the time-dependent reliability analysis of corroded RC beams, utilizing the phase-type (PH) fitting method. Initially, a model for the time-dependent reliability of corroded RC beams is established, incorporating the time-dependent chloride diffusion coefficient. Subsequently, a novel PH fitting method is proposed. The effectiveness of this new method is demonstrated through numerical examples. Furthermore, the time-dependent reliability analysis of corroded RC beams is compared using both the PH fitting method and the Monte Carlo simulation. The results reveal that the proposed method can accurately and efficiently deal with time-dependent reliability problems.

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Section: Eksploatacja I Niezawodnosc -Maintenance and Reliabilitymentioning

confidence: 99%

Time-dependent reliability analysis of corroded RC beams based on the phase-type fitting method

Li,

Chen,

Zhang

et al. 2023

Eksploatacja i Niezawodność – Maintenance and Reliability

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BN for Reinforced Concrete Structures

Liu,

Sridhar

2024

Bayesian Network Modeling of Corrosion

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Time-Dependent Reliability Assessment Method for RC Simply Supported T-Beam Bridges Based on Lateral Load Distribution Influenced by Reinforcement Corrosion

Tan

Chu

et al. 2022

Applied Sciences

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The safety and reliability of bridges gradually decrease over time under the influence of disadvantageous environmental factors, primarily due to reinforcement corrosion caused by chloride ingress. The traditional lateral load distribution (LLD) theory does not consider the influence of corrosion, which degrades the accuracy of bridge performance and reliability calculation. A time-dependent reliability assessment method for simply supported T-beam bridges is proposed in this paper, which considers the influence of reinforcement corrosion on LLD. Firstly, the steel corrosion process and degree are predicted based on the chloride ingress model, into which the water/cement ratio and concrete strength are innovatively introduced in order to improve the prediction accuracy. Secondly, the effective stiffness calculation method for corroded reinforcement bridges is established with the moment of inertia and section crack condition employed. Thirdly, the modified eccentric compression method is improved by the effective stiffness and iterative algorithm, which is suitable for the LLD calculation of corroded reinforcement bridges. The time-dependent vehicle load effect can be computed combined with the probability distribution of live load. Finally, the time-dependent reliability of the flexural bearing capacity is obtained by the Monte Carlo method and Bayesian theory without prior information. A simply supported bridge with five T-beams is taken as an example for analysis. It is indicated that the results calculated by the traditional reliability method are conservative, which cannot make a true and accurate evaluation. The method proposed in this paper can effectively reduce the assessment error caused by model uncertainty while considering the interaction between reinforcement corrosion and vehicle live load effect.

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Time-dependent reliability analysis for a set of RC T-beam bridges under realistic traffic considering creep and shrinkage

Cited by 3 publications

References 37 publications

Time-dependent reliability analysis of corroded RC beams based on the phase-type fitting method

Time-dependent reliability analysis of corroded RC beams based on the phase-type fitting method

BN for Reinforced Concrete Structures

Time-Dependent Reliability Assessment Method for RC Simply Supported T-Beam Bridges Based on Lateral Load Distribution Influenced by Reinforcement Corrosion

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