| 混凝土锈胀开裂的抑制措施 |
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| 引用本文： | 彭利英,卫军,武鹏宇,王腾.混凝土锈胀开裂的抑制措施[J].自然灾害学报,2011(1). |
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| 作者姓名： | 彭利英 卫军 武鹏宇 王腾 |
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| 作者单位： | 湖南工程学院建筑工程学院;中南大学土木建筑学院; |
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| 基金项目： | 交通部西部交通科技项目(200631822302-04); 铁道部重大科技项目(2008G031-18); 国家自然科学基金重点资助项目(50538070) |
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| 摘 要： | 钢筋锈蚀是影响混凝土结构耐久性最重要的因素。钢筋锈胀体积膨胀,对周围混凝土产生压力,继而导致保护层的受拉开裂,出现锈胀裂缝,这对结构整体的安全性和耐久性十分有害。研究混凝土锈胀裂缝的抑制措施,对提高结构的耐久性具有重要意义。从结构构造入手,以快速通电加速纵向钢筋锈蚀的方法,研究了混凝土保护层厚度和箍筋间距对混凝土构件锈胀开裂的影响;同时通过计算机仿真,对试验构件进行了数值试验。在此基础上,建立了构件表面应力与混凝土保护层厚度及箍筋间距的相关关系,得到了不同保护层厚和箍筋间距对试件表面锈胀裂缝的影响规律。
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| 关 键 词： | 锈胀裂缝 箍筋 保护层 抑制措施 数值试验 |
Restraining measures against rust expansion cracks of concrete |
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| PENG Li-ying,WEI Jun,WU Peng-yu,WANG Teng.Restraining measures against rust expansion cracks of concrete[J].Journal of Natural Disasters,2011(1). |
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| Authors: | PENG Li-ying WEI Jun WU Peng-yu WANG Teng |
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| Institution: | PENG Li-ying1,WEI Jun2,WU Peng-yu2,WANG Teng2(1.School of Construction Engineering,Hunan Institute of Engineering,Xiangtan 411104,China,2.School of Civil Engineering and Architecture,Central South University,Changsha 410075,China) |
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| Abstract: | Corrosion of steel bar is the most important factor that influences the endurance of reinforcement concrete structure.Rust expansion of steel bar can bilge the volume and exert pressure to concrete around.Afterwards the concrete cover split open by tension and rust expansion cracks appear,which is very harmful to the endurance and safety of the whole structure.Study on restraining measures of concrete rust expansion cracks has an important significance in improving the durability of structure.This research ... |
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| Keywords: | rust expansion crack stirrup protection layer restraining measure numerical experiment |
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