基于规定可靠指标的混凝土结构氯离子侵蚀耐久寿命预测  

Durablity life prediction of concrete structure based on the regulated reliability index under chloride environment

作　　者：马亚丽[1] 张爱林[1] 

机构地区：[1]北京工业大学,北京100022

出　　处：《土木工程学报》2006年第2期36-41,共6页China Civil Engineering Journal

基　　金：国家自然科学基金资助项目(50278005);北京市自然科学基金资助项目(8012004)

摘　　要：目前氯离子侵蚀环境下的混凝土结构耐久寿命的概率研究还很少。分析了影响混凝土结构氯离子侵蚀寿命的因素的概率分布特征,提出了基于F ick第二定律的氯离子侵蚀耐久寿命的概率计算方法。依据耐久可靠性理论,针对目前确定性参数方法预测结构寿命的不足,提出了基于规定可靠指标的氯离子侵蚀耐久寿命预测方法,该方法通过建立耐久可靠指标和侵蚀时间之间的关系,确定结构耐久可靠性低于规定可靠指标时的时间,并以此作为氯离子侵蚀耐久寿命终结的时间。分析完善了氯离子侵蚀环境下混凝土结构耐久寿命的预测方法。Using the Probability analysis on the durability life of concrete structure under the chloride environment is little known. probability method on the basis of the second Fick＇s law, research work was carried out to investigate the distribution factors that may influence the durability life of concrete structures. Due to the deficiency of the decisive method for prediction of durability life, a method based on the regulated reliability index is proposed. The relationship between the durable reliability index and the corrosion time is established. The present paper takes the time when the durable reliability index falls below a stipulated index as the end of durable life. The proposed predictive method of durability life for concrete structure under the chloride erosion environment is therefore improved.

关 键 词：氯离子侵蚀 混凝土结构 耐久寿命 概率分析 

分 类 号：TU503[建筑科学—建筑技术科学]