Reliability Analysis For Asphalt Pavement Based On Fuzzy Theory

Along with changes of the design method of asphalt pavement from settled worth method to probability method, the design level of asphalt pavement has gotten the exaltation. However the traditional reliability analysis method for asphalt pavement ,which neglects the fuzziness of compute model, stress, strength, and description in reliability analysis, results in the difference between the calculation result of the reliability degree and actual state of pavement structure.Through the experimental stud and theory analysis, this paper checks up the probability distributing of the parameters involved in reliability analysis for asphalt pavement structure, summarizes all kinds of present reliability calculation methods of asphalt pavement structure, and adopt stress-intensity intervene theory and Monte Carlo sample technique to workout a calculation programmer for tradition reliability of asphalt pavement structure.At the same time, the paper apply fuzzy theory reliability analysis for asphalt pavement structure, By analysis and research for destroy zone of asphalt pavement structure, with engineering practice this paper fixes on low half normal school function and low half echelon school function as destroy subjection function for asphalt pavement. And referencing presently domestic and oversea productions of asphalt pavement maintenance management system the paper set up fuzzy destroy subjection functions fitting in with asphalt pavement structure, puts forward the calculation methods of fuzzy reliability degree under given confidence degree and the methods of determination on confidence interval, and develop a programmer of fuzzy reliability for asphalt pavement structure.Through rebound modulus test for representative asphalt pavement base material under room and local conserved condition, the paper brings out the relationship of material rebound modulus under room and local conserved condition, and basing on that,, the paper makes a contrast analysis for asphalt pavement structure to reflect the effect to fuzzy reliability of asphalt pavement structure when tested rebound modulus of base material is under different conserved condition.