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首页> 外文期刊>Journal of aerospace engineering >Monitoring-Based Reliability Analysis of Aging Concrete Structures by Bayesian Updating
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Monitoring-Based Reliability Analysis of Aging Concrete Structures by Bayesian Updating

机译：贝叶斯更新的基于监测的老化混凝土结构可靠性分析

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Structural-health-monitoring techniques provide valuable in-service measured information for existing civil engineering structures such as bridges, which can be used for predicting future structural performance and determining optimum maintenance strategy. This paper presents an effective approach for analyzing structural reliability during the service life of existing reinforced-concrete structures on the basis of monitored information. The process of lifetime structural-performance deterioration affected by reinforcement corrosion such as bond strength and load-bearing capacity is discussed. Crack growth in cover concrete due to reinforcement corrosion is demonstrated to be the main factor for structural-performance deterioration, thus it is chosen as a representative symptom for evaluating lifetime structural reliability. In order to consider the uncertainty in modeling structural-performance deterioration, the Weibull life evolution model associated with the cover concrete crack growth is employed for analyzing reliability, updating probability of failure profiles after maintenance, and evaluating optimal maintenance strategy. The results for a concrete bridge show that the proposed approach can provide reliable predictions of future structural performance and cost-effective maintenance strategy of aging reinforced-concrete structures. (C) 2015 American Society of Civil Engineers.
机译：结构健康监测技术可为桥梁等现有的土木工程结构提供有价值的在役测量信息，这些信息可用于预测未来的结构性能并确定最佳的维护策略。本文提出了一种有效的方法，根据监测信息分析现有钢筋混凝土结构使用寿命期间的结构可靠性。讨论了受钢筋腐蚀（如粘结强度和承载能力）影响的结构寿命性能下降的过程。事实证明，由于钢筋锈蚀引起的覆盖混凝土裂缝的增长是造成结构性能下降的主要因素，因此被选为评估使用寿命结构可靠性的代表。为了考虑在模拟结构性能退化时的不确定性，采用了与覆盖混凝土裂缝增长相关的威布尔寿命演化模型来分析可靠性，更新维护后的失效情况概率以及评估最佳维护策略。一座混凝土桥梁的结果表明，所提出的方法可以为老化的钢筋混凝土结构的未来结构性能和经济有效的维护策略提供可靠的预测。 （C）2015年美国土木工程师学会。

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