Parameter sensitivity analysis on structural durability of pre-stressed concrete under marine environment

For the pre-stressed concrete structure under marine environment,the stochastic characters of structure and environment such as concrete cover depth,initial concentration of chloride ions,chloride diffusion coefficient in concrete,critical concentration of chloride ions and structural surface concentration of chloride ions affect the structural durability in designed service life greatly.Based on the diffusion mechanism of chloride ions,considered the durability failure character of pre-stressed concrete structure,the limit state function of durability failure is established,the sensitivity of durability influencing parameters is analysis,and the Monte Carlo simulation is carried out based on the stochastic characters of influencing parameters,which will provide method and foundation for the structural durability design,construction and quality control of similar project.