| 受硫酸盐腐蚀钢筋混凝土梁延性分析 |
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| 引用本文： | 范颖芳,胡志强,赵颖华.受硫酸盐腐蚀钢筋混凝土梁延性分析[J].哈尔滨工业大学学报,2009,41(4):239-242. |
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| 作者姓名： | 范颖芳 胡志强 赵颖华 |
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| 作者单位： | 范颖芳,赵颖华,FAN Ying-fang,ZHAO Ying-hua(大连海事大学,道路与桥梁工程研究所,大连,116026);胡志强,HU Zhi-qiang(大连理工大学,土木水利学院,大连,116024)
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| 基金项目： | 国家自然科学基金，辽宁省博士科研启动基金，海岸与近海工程国家重点实验室资助项目 |
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| 摘 要： | 为了研究受硫酸盐腐蚀钢筋混凝土梁的延性退化规律,分别利用截面分析法和分形理论对受硫酸盐腐蚀钢筋混凝土梁的延性特性进行了分析计算.在平截面假定的基础上,考虑钢筋和混凝土的腐蚀特点,讨论了钢筋锈蚀与混凝土腐蚀对钢筋混凝土梁延性的影响,分析了受腐蚀梁截面曲率延性系数随钢筋锈蚀率及混凝土劣化系数的演变规律;根据受硫酸盐腐蚀钢筋混凝土梁力学性能的实验研究结果,建立了受硫酸盐腐蚀钢筋混凝土梁截面延性系数的简化计算公式,得到了构件表面裂缝分形维数与构件延性之间的关系.
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| 关 键 词： | 腐蚀 硫酸盐 延性 屈服曲率 极限曲率 分形维数 |
Ductility analysis of reinforced concrete beams corroded by sulfate |
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| FAN Ying-fang,HU Zhi-qiang,ZHAO Ying-hua.Ductility analysis of reinforced concrete beams corroded by sulfate[J].Journal of Harbin Institute of Technology,2009,41(4):239-242. |
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| Authors: | FAN Ying-fang HU Zhi-qiang ZHAO Ying-hua |
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| Affiliation: | 1(1.Institute of Road and Bridge Engineering,Dalian Maritime University,Dalian 116026,China;2.School of Hydraulic and Civil Engineering,Dalian University of Technology,Dalian 116024,China) |
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| Abstract: | To investigate the deteriorating process of reinforced concrete beams corroded by sulfate,the section analysis method and fractal theory were employed to analyze and calculate the ductility of the corroded beams respectively.According to the corrosion mechanism of the concrete and reinforcing steel in sulfate environment,the normal assumption of plane section behavior was proved to hold true.The available ductility of corroded doubly reinforced concrete beam sections with a range of reinforcement corrosion and concrete degradation was discussed.Based on the mechanical test of corroded beams,a simplified expression is put forward to predict the ductility factor for the beams corroded by sulfate.Relationship between the fractal dimension and the ductility factor of the corroded beams is achieved. |
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| Keywords: | corrosion sulfate ductility yield curvature ultimate curvature fractal dimension |
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