| 海洋环境下钢筋混凝土桥梁结构的耐久性评估 |
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| 引用本文： | 朱绩超,邵旭东.海洋环境下钢筋混凝土桥梁结构的耐久性评估[J].大连铁道学院学报,2010(2):28-33. |
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| 作者姓名： | 朱绩超 邵旭东 |
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| 作者单位： | 大连交通大学土木与安全工程学院;湖南大学桥梁工程研究所; |
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| 摘 要： | 以海洋环境为背景,从钢筋和混凝土自身的劣化出发,根据Fick扩散定律,推导出沿海环境下钢筋初始锈蚀时间的计算公式.考虑钢筋坑蚀的特点,选择了适合的钢筋劣化模型和混凝土劣化模型,建立了偏心受压结构按承载力极限状态计算的抗力劣化模型,并运用可靠度分析方法对某跨海大桥的墩柱进行了耐久性评估.
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| 关 键 词： | 海洋环境 氯离子侵蚀 可靠度指标 耐久性评估 |
Durability Assessment of Reinforced Concrete Bridge Structures in Marine Environment |
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| ZHU Ji-chao,SHAO Xu-dong.Durability Assessment of Reinforced Concrete Bridge Structures in Marine Environment[J].Journal of Dalian Railway Institute,2010(2):28-33. |
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| Authors: | ZHU Ji-chao SHAO Xu-dong |
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| Institution: | ZHU Ji-chao1,SHAO Xu-dong2(1.School of Civil & Safety Engineering,Dalian Jiaotong University,Dalian 116028,China,2.Institute of Bridge Engineering Hunan University,Changsha 410082,China) |
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| Abstract: | Based on the background of the marine environment,the formulas are derived for evaluating the intial corrosion time of steel bars under coastal chloride ion environments acoording to deterioration mechanism of steel bars and concrete and Fick′s diffusion theorem.Considering the pitting corrosion characteristic of the steel bar,appropriate steel bar deterioration models and concrete deterioration models are selected,and the resistance deterioration model of eccentrically compressed structure calculated on bearing capacity limited state is established.Finally,durability assessment of the piers of an in-service cross-sea bridge is made by means of reliability analysis. |
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| Keywords: | marine environment chloride ion corrosion reliability index durability assessment |
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