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| 基于双G断裂准则的钢筋混凝土结构锈胀寿命预测 | |
| 引用本文： | 刘春城,石磊,徐健,杨杰.基于双G断裂准则的钢筋混凝土结构锈胀寿命预测[J].公路交通科技,2009,26(2). |
| 作者姓名： | 刘春城 石磊 徐健 杨杰 |
| 作者单位： | 1. 东北电力大学,建筑工程学院,吉林,吉林,132012;大连理工大学,土木水利学院,辽宁,大连,116023 2. 大连理工大学,土木水利学院,辽宁,大连,116023 3. 东北电力大学,建筑工程学院,吉林,吉林,132012 |
| 基金项目： | 吉林省教育厅科技计划项目 |
| 摘 要： | 基于文献1]提出的腐蚀钢筋混凝土钢筋锈胀力的公式，利用断裂力学理论推导了锈蚀钢筋混凝土构件裂缝扩展应变能释放率的表达式，应用双G断裂准则对锈蚀钢筋混凝土结构的裂纹扩展寿命进行了预测，分析了裂纹扩展寿命与混凝土强度等级，保护层厚度和钢筋直径的定量关系。结果表明：构件初始裂纹长度时锈胀的起裂、稳定扩展和失稳扩展寿命影响非常严重；钢筋直径和混凝土强度等级的增加会引起裂纹扩展寿命的增加，随着混凝土保护层厚度的增大，裂纹扩展寿命略有下降趋势。因此，为提高混凝土结构的耐久性，合理设置混凝土保护层厚度是至关重要的。 |
| 关 键 词： | 桥梁工程 钢筋混凝土 双G断裂准则 能量释放率 锈胀 使用寿命 |
Life-span Prediction of Reinforced Concrete Corrosive Expansion Based on Double-G Fracture Criterion |
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| LIU Chuncheng,SHI Lei,XU Jian,YANG Jie.Life-span Prediction of Reinforced Concrete Corrosive Expansion Based on Double-G Fracture Criterion[J].Journal of Highway and Transportation Research and Development,2009,26(2). | |
| Authors: | LIU Chuncheng SHI Lei XU Jian YANG Jie |
| Institution: | 1.School of Civil and Architecture Engineering;Northeast Dianli University;Jilin Jilin 132012;China;2.School of Civil and Hydraulic Engineering;Dalian University of Technology;Dalian Liaoning 116023;China |
| Abstract: | Based on the corrosive expansion force of reinforced concrete member in Reference 1],the formula of strain energy release rate for crack propagation in corrosive reinforced concrete members was presented by fracture mechanics approach.The double-G fracture criterion was applied on the prediction of crack propagation life-span of corrosive reinforced concrete,and the factors that affect crack propagation life-span,such as the grade of concrete strength,the depth of concrete cover and the rebar diameter,were... |
| Keywords: | bridge engineering reinforced concrete double-G fracture criterion energy release rate corroded expansion life-span |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |