氯离子侵蚀混凝土管桩寿命预测理论模型  

Service Life Prediction of Concrete Pipe Pile Due to Chloride Ion Corrosion by Modeling

作　　者：邵伟[1,2] 李镜培[1,2] 岳著文[1,2] 

机构地区：[1]同济大学,岩土及地下工程教育部重点实验室,上海200092 [2]同济大学地下建筑与工程系,上海200092

出　　处：《硅酸盐学报》2013年第5期575-581,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51178341)资助项目

摘　　要：氯离子引起的钢筋锈蚀是混凝土管桩性能劣化的主要原因之一。以氯离子对钢筋的侵蚀机理为基础,将氯离子对混凝土管桩的侵蚀过程分为三个阶段:扩散阶段、初始裂纹产生阶段和裂纹扩展阶段,并分别对三个劣化阶段进行了分析,在此基础上建立了氯离子侵蚀混凝土管桩的寿命预测理论模型,对初始裂纹产生阶段的寿命预测模型进行了验证。结果表明:预测结果与实验结果吻合较好。Chloride-induced reinforcing steel corrosion is one of the most predominant deterioration mechanisms for concrete pipe piles. Based on the chloride-induced reinforcing steel corrosion mechanism, the deterioration process of corrosion affected concrete pipe piles can be divided into three phases, i.e., a diffusion phase, a crack initiation phase and crack propagation phase. The three deterioration phases were analyzed, respectively. A theoretical model for service life prediction of concrete pipe piles due to chloride ion corrosion was proposed. The service life prediction of crack initiation phase was also carried out by the model. The results show that predictive results are similar to the experiment data.

关 键 词：混凝土管桩 氯离子扩散 钢筋锈蚀 裂纹扩展 寿命预测 理论模型 

分 类 号：TU528[建筑科学—建筑技术科学]