نوع مقاله : علمی - پژوهشی
چکیده
کلیدواژهها
عنوان مقاله [English]
To prevent fatigue failure on long-life asphalt pavement, it is important to consider endurance limit in design. The endurance limit is defined as the tensile strain below which no fracture or fatigue damage occurs. Review of the literature shows that it is very time consuming to conduct fatigue tests at low strain. One of the major reasons for increasing of test time is self-healing. Beam fatigue tests results at low strain show that the stiffness and dissipated energy remains almost constant with increasing the repeated load number in the early part of test
In this research study, to reduce the testing time and self-healing effect, it was proposed that the tests be conducted using loading at 25 Hz. Results showed that there is good correlation between fatigue lives based on loading at 25 Hz and 10 Hz. According to the tests results, two relationships were developed between fatigue lives based on loading at 10 Hz and 25Hz for normal and low strain.
کلیدواژهها [English]
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