| RC桥梁碳化腐蚀下的开裂风险、耐久性和全寿命成本分析 |
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| 引用本文： | 彭建新,张建仁.RC桥梁碳化腐蚀下的开裂风险、耐久性和全寿命成本分析[J].公路交通科技,2011,28(2):37-44,51. |
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| 作者姓名： | 彭建新 张建仁 |
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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： | 国家自然科学基金资助项目，湖南省科技计划应用基础项目，长沙理工大学桥隧重点学科创新基金资助项目 |
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| 摘 要： | 基于改进的碳化深度预测模型,利用最新的CO<,2>浓度数据,发展了时变可靠度模型计算混凝土结构在碳化腐蚀下的开裂概率.建立概率模型可以考虑CO<,2>浓度、扩散过程、劣化机理、钢筋的位置、保护层深度、腐蚀电流的随机性和不确定性.计算了不同耐久性设计状态下和不同的锈胀开裂宽度准则下在碳化腐蚀作用下的开裂风险.建立了全寿命...
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| 关 键 词： | 桥梁工程 RC桥梁 碳化腐蚀 耐久性 开裂风险 时变可靠度 全寿命成本 |
Cracking Risk,Durability and Life-cycle Cost for RC Bridge Subject to Carbonation-induced Corrosion |
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| PENG Jianxin,ZHANG Jianren.Cracking Risk,Durability and Life-cycle Cost for RC Bridge Subject to Carbonation-induced Corrosion[J].Journal of Highway and Transportation Research and Development,2011,28(2):37-44,51. |
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| Authors: | PENG Jianxin ZHANG Jianren |
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| Institution: | PENG Jianxin,ZHANG Jianren(School of Civil Engineering and Architecture,Changsha University of Science & Technology,Changsha Hunan 410004,China) |
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| Abstract: | Based on the improved carbonation depth prediction model,by using the latest time-dependent CO2 concentration data,a time-dependent structural reliability model for computing the cracking probability of concrete structure subject to carbonation-induced corrosion was developed,considering CO2 concentration and emission,deterioration mechanism,position of steel reinforcement,concrete cover thickness,and randomness and uncertainty of corrosive current.The cracking risks under various durability design specific... |
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| Keywords: | bridge engineering RC bridge carbonation-induced corrosion durability cracking risk time-dependent reliability life-cycle cost |
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