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

IF 2.2 3区工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY

Eksploatacja I Niezawodnosc-Maintenance and Reliability Pub Date : 2023-09-18 DOI:10.17531/ein/172442

Junxiang Li, Jianqiao Chen, Xinxin Zhang, Zijun Wu

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引用次数: 0

Abstract

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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基于相型拟合方法的腐蚀RC梁时变可靠度分析

定量描述钢筋混凝土(RC)结构在氯离子渗透作用下的腐蚀仍然是一个重要的挑战。考虑到腐蚀环境下钢筋混凝土结构在整个生命周期中所遇到的不确定性，并对其安全性和可靠性进行评估，问题的复杂性随之增加。为了解决这些问题，本文采用相型拟合方法对腐蚀RC梁的时变可靠度进行了分析。首先，建立了考虑氯离子扩散系数的腐蚀钢筋混凝土梁时变可靠度模型。随后，提出了一种新的PH拟合方法。通过数值算例验证了该方法的有效性。此外，采用PH拟合方法和蒙特卡罗模拟方法对腐蚀钢筋混凝土梁的时变可靠度分析进行了比较。结果表明，该方法能够准确有效地处理时变可靠性问题。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Eksploatacja I Niezawodnosc-Maintenance and Reliability ENGINEERING, MULTIDISCIPLINARY-

CiteScore

5.70

自引率

24.00%

发文量

审稿时长

3 months

期刊介绍： The quarterly Eksploatacja i Niezawodność – Maintenance and Reliability publishes articles containing original results of experimental research on the durabilty and reliability of technical objects. We also accept papers presenting theoretical analyses supported by physical interpretation of causes or ones that have been verified empirically. Eksploatacja i Niezawodność – Maintenance and Reliability also publishes articles on innovative modeling approaches and research methods regarding the durability and reliability of objects.