Abstract
For the pre-stressed concrete structure under marine environment，the stochastic characters of structure and environment such as concrete cover depth, initial chloride ions concentration, chloride diffusion coefficient in concrete, critical chloride ions concentration and structural surface chloride ions concentration affect the structural durability in designed service life greatly. Based on the diffusion mechanism of chloride ions, considering 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 analyzed, 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.
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