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Life-Cycle Reliability Evaluation of Semi-Rigid Materials Based on Modulus Degradation Model
Jiupeng Zhang,Shengchao Cui,Jun Cai,Jianzhong Pei,Yanshun Jia 대한토목학회 2018 KSCE JOURNAL OF CIVIL ENGINEERING Vol.22 No.6
The dynamic modulus of semi-rigid material is one of the important material parameters widely used in the design and evaluate ofasphalt pavement, which has a great effect on the reliability, healthy condition and service life of pavement. To show the three-phasedegradation process of dynamic modulus accurately and calculate the time-dependent reliability based on fatigue damage, thedegradation models based on non-linear fatigue damage and improved Wei-bull distribution modulus degradation are established andtestified in this paper, considering the threshold of normalized modulus. Then the reliability models based on the two abovedegradation process models are evaluated. Finally, the reliability analysis procedure is established using Monte Carlo (MC) methodand the corresponding calculation is conducted using Matlab. Cement stabilized macadam is used as an example in this paper. Results show that non-linear fatigue damage and improved Wei-bull distribution modulus degradation models can indicate threephasedegradation process of semi-rigid material modulus better and the reliability based on the proposed two models was moreaccurate to the actual situation.
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