| 混凝土保护层锈胀裂缝扩展的仿真分析 |
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| 引用本文： | 毕继红,张华,任洪鹏.混凝土保护层锈胀裂缝扩展的仿真分析[J].三峡大学学报(自然科学版),2011,33(5):41-45. |
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| 作者姓名： | 毕继红 张华 任洪鹏 |
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| 作者单位： | 1. 天津大学建筑工程学院,天津 300072;滨海土木工程结构与安全教育部重点实验室(天津大学),天津 300072
2. 天津大学建筑工程学院,天津,300072 |
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| 摘 要： | 基于均匀锈胀理论,得出保护层裂缝贯通时锈胀力的计算方法,运用有限元分析软件FINAL建立模型,通过分步加载的方式对模型的破坏过程进行仿真计算.以某混凝土简支梁为例建立二维有限元模型,得出模型由初始开裂到贯通时的裂缝发展图以及最大主应力图,通过分析可以得知初始裂缝发生于钢筋与混凝土的交界面处.计算分析不同保护层厚度对裂缝发展的影响,结果表明,保护层初裂时的荷载基本一致,保护层厚度的增加能够有效减缓裂缝的贯通.提高混凝土等级研究裂缝的发展,结果表明混凝土等级的提高对抑制裂缝的发展同样有益.本文所得结论对于钢筋混凝土结构耐久性研究有重要的参考意义.
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| 关 键 词： | 钢筋锈蚀 锈胀力 保护层厚度 混凝土裂缝 |
Simulation Analysis of Crack Propagation Due to Corrosion Expansion in Concrete Protection Layer |
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| Bi Jihong,Zhang Hua,Ren Hongpeng.Simulation Analysis of Crack Propagation Due to Corrosion Expansion in Concrete Protection Layer[J].Journal of China Three Gorges University(Natural Sciences),2011,33(5):41-45. |
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| Authors: | Bi Jihong Zhang Hua Ren Hongpeng |
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| Institution: | Bi Jihong1,2 Zhang Hua1 Ren Hongpeng1(1.School of Civil Engineering,Tianjin Univ.,Tianjin 300072,China,2.Key Laboratory of Coast Civil Structure Safety of Ministry of Education,China) |
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| Abstract: | Based on the theory of uniform corrosion expansion,the method for calculating the force when the cracks come through the concrete protection layer was established.A FEM software FINAL is used to establish model to simulate the progress of breaking down through adding load step by step.Taking concrete beam for example to establish two-dimensional FEM model can obtain the development chart from the initial cracking to the penetration and the maximum principal stress chart,which can know that the initial crack... |
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| Keywords: | steel corrosion corrosion expansion force protection layer thickness concrete crack |
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