| 锈蚀钢筋混凝土梁开裂的分形特征 |
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| 引用本文： | 张建仁,余常,王磊,乔文慧.锈蚀钢筋混凝土梁开裂的分形特征[J].长沙交通学院学报,2010,26(1):29-34. |
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| 作者姓名： | 张建仁 余常 王磊 乔文慧 |
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| 作者单位： | 长沙理工大学,土木与建筑学院,湖南,长沙,410004 |
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| 基金项目： | 国家自然科学基金，交通运输部西部交通建设科技项目，湖南省应用基础重点项目 |
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| 摘 要： | 基于电化学快速锈蚀混凝土梁的静载试验，分析了相同类型5片锈蚀钢筋混凝土梁在各级荷载下的裂缝特征，证明了构件裂缝分布具有分形特性，在此基础上，利用分形理论研究了锈蚀钢筋混凝土梁开裂及破坏过程，讨论了裂缝分维数与荷载、跨中挠度及钢筋锈蚀率的关系．试验结果表明：随着试验梁上作用荷载的增加，构件裂缝的分维数逐渐增大；极限荷载下锈蚀钢筋混凝土梁裂缝的分维数随着钢筋锈蚀率的增加而减小．
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| 关 键 词： | 钢筋混凝土梁 锈蚀 裂缝 分形 分维数 |
Fractal characteristics of cracks for corroded reinforced concrete beams |
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| ZHANG Jian-ren,YU Chang,WANG Lei,QIAO Wen-hui.Fractal characteristics of cracks for corroded reinforced concrete beams[J].Journal of Changsha Communications University,2010,26(1):29-34. |
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| Authors: | ZHANG Jian-ren YU Chang WANG Lei QIAO Wen-hui |
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| Institution: | (School of Civil Engineering and Architecture, Changsha University of Science Technology, Changsha 410004, China) |
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| Abstract: | Based on the static test about the electrochemical accelerated corrosion reinforced concrete beams, the cracking characteristics of the five type reinforced concrete beams under different load levels are analyzed. It is verified that the cracks of beams present the fractal behavior. After the fractal geometry is used to investigate the cracking and failure process of the corroded reinforced concrete beams, the relationships between the fractal dimension of cracks and load, mid span deflection, the reinforcement corrosion rates are discussed. The experimental investigation shows that the fractal dimension of cracks enlarges with the increase of loads on beams, the fractal dimension of cracks on ultimate load decreases with the increase of corrosion rates. |
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| Keywords: | reinforced concrete beam corrosion crack fractal fractal dimension |
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