| 钢筋混凝土桥梁在大气环境作用下的耐久性评估和剩余寿命预测 |
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| 引用本文： | 罗纪彬.钢筋混凝土桥梁在大气环境作用下的耐久性评估和剩余寿命预测[J].湖南广播电视大学学报,2009(3):46-49. |
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| 作者姓名： | 罗纪彬 |
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| 作者单位： | 湖南华罡交通规划设计研究院,湖南长沙,410076 |
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| 摘 要： | 根据混凝土碳化及其引起的钢筋锈蚀的机理，建立了钢筋混凝土构件的劣化模型。利用Monte Carlo模拟方法分别研究了一般运营和密集运营两种荷载模型下钢筋混凝土桥梁的时变可靠性，讨论了保护层厚度、混凝土强度、钢筋锈蚀损失率对混凝土耐久性的影响。研究表明：在服役过程中，由于大气环境的作用，混凝土碳化、钢筋锈蚀、桥梁结构可靠指标不断降低，混凝土的耐久性能不断下降；混凝土保护层厚度和混凝土抗压强度对可靠度指标的影响明显，而钢筋腐蚀率的影响不是很明显。
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| 关 键 词： | 桥梁劣化 钢筋锈蚀 时变可靠度 耐久性评估 剩余寿命预测 |
Durability Assessment and Residual Lifetime Prediction of RC Bridge under Atmospheric Environmental Attack |
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| LUO Ji-bin.Durability Assessment and Residual Lifetime Prediction of RC Bridge under Atmospheric Environmental Attack[J].Joournal of Hunan Radio and Televistion University,2009(3):46-49. |
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| Authors: | LUO Ji-bin |
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| Institution: | LUO Ji - bin |
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| Abstract: | Reinforced concrete （RC） deterioration models due to concrete carbonation and reinforcing steel corrosion was developed in present study. Time - variant reliability of RC under different traffic load models was investigated based on Monte Carlo simulation method, and durability sensitivities to three factors, i.e. concrete cover, concrete strength and reinforcing steel corrosion rate were analyzed. It was showed from results that the reliability index of RC system descent due to steel reinforcement corrosion, and was sensitivity to concrete cover and concrete strength, but not reinforcing steel corrosion rate. |
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| Keywords: | bridge deterioration corrosion time - variant reliability durability evaluation residual lifetime prediction |
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