| 基于冻融损伤抛物线模型的再生混凝土寿命预测 |
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| 引用本文： | 王立久,汪振双,崔正龙.基于冻融损伤抛物线模型的再生混凝土寿命预测[J].应用基础与工程科学学报,2011,19(1):29-35. |
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| 作者姓名： | 王立久 汪振双 崔正龙 |
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| 作者单位： | 1. 大连理工大学土木水利学院,辽宁,大连,116024
2. 辽宁工程技术大学建筑工程学院,辽宁,阜新,123000 |
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| 基金项目： | “十一五”国家科技支撑计划重大项目(2006BAJ04A04); 辽宁省教育厅资助项目(2008282) |
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| 摘 要： | 混凝土冻融损伤不仅会影响工程结构的外观与正常运行,还可能影响工程安全及耐久性,缩短工程的寿命.本文借助损伤力学原理,以相对动弹模量损失为损伤变量,提出了混凝土损伤抛物线模型,利用前人的研究结果对模型精度进行了验证.采用对比试验,分析了C40再生混凝土冻融损伤失效过程,利用损伤抛物线模型对再生混凝土寿命进行了预测.结果表明,损伤抛物线模型精度较高,满足工程应用的要求,再生混凝土的寿命可达到50年耐久性设计指标.
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| 关 键 词： | 再生混凝土 损伤抛物线模型 寿命预测 |
Service Life Prediction of Recycled Concrete Based on Freezing-thawing Damage Parabola Model |
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| WANG Lijiu,WANG Zhenshuang,CUI Zhenglong.Service Life Prediction of Recycled Concrete Based on Freezing-thawing Damage Parabola Model[J].Journal of Basic Science and Engineering,2011,19(1):29-35. |
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| Authors: | WANG Lijiu WANG Zhenshuang CUI Zhenglong |
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| Institution: | WANG Lijiu1,WANG Zhenshuang1,CUI Zhenglong2(1.School of Hydraulic and Engineering,Dalian University of Technology,Dalian 116024,China,2.College of Civil and Architecture Engineering,Liaonin Technical University,Fuxin 123000,China) |
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| Abstract: | Freezing-thawing damage in concrete not only affect appearance of concrete,normal operation of engineering,but also shorten the safety and service life-span.Damage parabola model(DPM)is presented in concrete by the principles of damage mechanic with relative dynamic modulus loss as damage variable,and the DPM is validated by previous work.According to contrast experiment,the process of freezing-thawing damage is analysis in C40 recycled aggregate concrete,and its service life prediction is predicted based o... |
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| Keywords: | recycled aggregate damage parabola model service life prediction |
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