Spatial variability-based corrosion risk assessment and strategy of repair and maintenance for RC structures
A corrosion risk assessment model (CRAM) of reinforced concrete structure subject to marine environment is presented in this paper.The spatial variability of parameters which are decisive for the durability performance is modeled probabilistically in terms of sample statistics which may be assessed by testing of existing structures.Result of chloride profile test is suggested to update the input model parameters for future structural condition prediction.The requirements to the service life performance are formulated in terms of the probability that the structure will be in a certain condition class after a given number of years.Further,it is demonstrated how optimal strategies for repair and maintenance of concrete structure subject to chloride ingress can be determined on the basis of corrosion risk classes.An example is illustrated through assessment and optimal repair strategy.For structures with large concrete surface exposed to chloride-laden environment,both spatial and temporal characteristics of deterioration are suggested to be considered in condition assessment based on field inspection.
corrosion risk spatial variability optimal strategy assessment chloride reinforced concrete.
Xiao-Zhou WANG Wei-Liang JIN
Department of Civil Engineering,Zhejiang University,Hangzhou 310027,China
国际会议
International Conference on Modelling,Identification and Control(模拟、鉴定、控制国际会议)
上海
英文
2008-06-29（万方平台首次上网日期，不代表论文的发表时间）