铁道科学与工程学报2017，Vol.14Issue(12)：2570-2578,9.
混凝土中氯离子扩散数值分析方法及实桥应用
Numerical simulation method of the chloride ion diffusion inconcrete andits application in bridge
摘要
Abstract
Chloride-induced corrosion can influence the serviceable performance of RC structures.Anumerical analysis methodwas proposed on the basis ofthe modified diffusion model and finite element software in chlorides to verify the multi-dimensional diffusion test results.The chloride ion concentration prediction wasthen conducted in two engineering projects. Research results show that: the values calculated by the numerical model are in good agreement with the test values.When the spatial distribution of chloride concentration is taken into account, the chloride concentration is different at the same depth but different position of prestressed T-beam.The maximum chloride concentration of the outermost layer of reinforcing bar is 0.231% at time of 100 a.The chloride concentration atthecorner of bottom slab with depth of 40mm to exposed area is 1.03 kg/m3which is 1.30 times of that at middle of bottom slab for prestressed concrete box girder at time of 100a.The maximum chlorideconcentration is less than the critical chloride concentrationthat corrosion of the reinforced bars in concrete will not happen.关键词
桥梁工程/混凝土/氯离子/修正扩散系数/数值分析Key words
bridge engineering/concrete/chloride ion/modified diffusion coefficient/numerical analysis分类
交通工程引用本文复制引用
胡守旺,彭建新,张建仁..混凝土中氯离子扩散数值分析方法及实桥应用[J].铁道科学与工程学报,2017,14(12):2570-2578,9.基金项目
国家重点基础研究发展计划(973计划)项目[2015CB057701] （973计划）
国家自然科学基金面上资助项目[51178060] （）
交通运输部主干学科应用基础研究资助项目[2014319825160] （）
湖南省教育厅优秀青年资助项目[15B015] （）
桥梁结构安全控制湖南省工程实验室开放基金资助项目[14KD12] （）
湖南省研究生创新省级资助项目[CX2015B344] （）
桥梁结构安全控制和耐久性评估的理论研究及工程应用团队建设资助项目[15YTD07] （）
