摘要
侵蚀性环境中的混凝土结构常因钢筋锈蚀导致其耐久性劣化而提前退役,对混凝土结构耐久性态进行诊断,准确预测其剩余使用年限,科学评估其服役能力是结构后续安全耐久运维的基础。研究从结构全寿命周期性能劣化过程出发,充分考虑了结构服役环境的复杂性以及钢筋锈蚀对结构性能的影响,提出了基于钢筋锈蚀的混凝土结构耐久性极限状态,根据实际工程结构钢筋锈蚀的概率分析结果,明确了混凝土结构耐久性分级标准,给出了基于钢筋锈蚀的混凝土结构耐久性评定标准,实现了以钢筋锈蚀进程为依据的混凝土结构耐久性科学评定。研究可为一般大气环境、氯盐环境中以钢筋锈蚀为主要劣化形式的混凝土结构提供耐久性评定依据,并对结构后期维护与性能提升具有较好的指导意义。
Concrete structures in corrosive environment often suffer from reinforcement corrosion,which leads to durability degradation and shortens the service life of these structures.The safe and durable operation and maintenance of concrete structures are based on durability diagnosis,accurate prediction of the residue life,and scientific evaluation of the service capabilities.On the basis of the performance degradation process during the whole lifetime of the structure,the complexity of the service environment of the structure and the effects of reinforcement corrosion on structure performance were fully considered,and the durability limit states of concrete structures based on reinforcement corrosion were presented.The durability grades of concrete structures were defined according to the probability analysis of the reinforcement corrosion of field structures,and the scientific evaluation of the durability of concrete structures by referring to the reinforcement corrosion process was achieved.The study provides a reference for the durability evaluation of concrete structures with reinforcement corrosion as the main degradation form in normal atmospheric environment and chloride environment,and it is of guiding significance for later operation and maintenance of such structures.
作者
罗大明
牛荻涛
LUO Daming;NIU Ditao(State Key Laboratory of Green Building in Western China,Xi’an University of Architecture and Technology,Xi’an 710055,China;School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China)
出处
《工业建筑》
CSCD
北大核心
2022年第10期1-8,70,共9页
Industrial Construction
基金
国家自然科学基金项目(52278217)
陕西省教育厅青年创新团队建设科研计划项目(21JP059)。
关键词
混凝土结构
钢筋锈蚀
混凝土中性化
氯盐腐蚀
性能劣化
耐久性评定
concrete structure
reinforcement corrosion
concrete neutralization
chloride corrosion
performance degradation
durability evaluation
