The Reliability Analysis of Flexural Concrete Member Based on the Randomness of Pitting

In order to analyze the influence of stochastic pitting corrosion to the reliability of service structure,according to the theory of extreme values of random variables and the basic theory of reliability analysis,the reliability of flexural concrete member based on the randomness of pitting,the change of statistical parameters for both corroded steel bar and resistance is also analyzed based on the randomness of pitting.Based on the checking point method,the development law of reliability of concrete bending members with the number of random variables and the service life are studied.The results indicat that the influence of the randomness of pitting to the reliability of flexural concrete members is of the most significance,the reliability index decline with the increase of number of random variables and the service life.The analysis shows that research presented in the paper can provide theoretical basis of life prediction.