| Summary: | 碩士 === 國立成功大學 === 土木工程學系碩博士班 === 93 === Reflective cracking is a common type of distress that occurs on composite AC/PCC pavement. Two main ways to analyze reflective cracking were developed. One is getting the relationship between fatigue life and failure by applying cyclic loading on asphalt beam in laboratory, the other is to research the tendency of cracking by computer simulation. It is not only microcosmic and accurate, but also quantifying the damage from traffic loading and temperature loading if analysis base on fracture mechanics. Cracking growth speed (failure potential) is predicted by stress intensity factor and Paris’ Law. Also, Use S-N curve to predict fatigue life of glassgrid. The first finding in this research is that the glassgrid does not delay happening of cracking, but it is effective on extending life of the system in the process of crack propagation because of its tensile strength. The result indicated that an increase in the stiffness of the geogrid is not related well to the fatigue life. The reinforcement effect was more pronounced for weaker subgrade foundation.
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