한국도로학회 학술대회 발표논문 초록집 2008 가을 학술대회 논문집

An energy based crack growth model is developed in this study to simulate the propagation of top-down cracking in asphalt pavements. A viscoelastic fracture mechanics approach, generalized J integral, is employed to model the crack growth of asphalt concrete. Laboratory fatigue crack propagation tests for three different asphalt mixtures are performed at various load levels, frequencies and temperatures. Disk-shaped specimens with a proper loading fixture and crack growth monitoring system are selected for the tests. It is observed from the tests that the crack propagation model based on the generalized J integral is independent of load levels and frequencies, while the traditional Paris’ law model based on stress intensity factor is dependent of loading frequencies. However, both models are unable to take care of the temperature dependence of the mixtures. The fatigue crack propagation model proposed in this study has a good agreement between experimental and predicted crack growth lives, which implies that the energy based J integral could be a better parameter to describe fatigue crack propagation of viscoelastic materials such as asphalt mixtures.

4,000원

5.

2008.10 구독 인증기관 무료, 개인회원 유료

용융분사식 칼라포장공법의 성능

Performance Evaluation of Melting-Blown Color Pavement Method

이수형, 유인균

한국도로학회 학술대회 발표논문 초록집 2008 가을 학술대회 논문집 pp.103-109 한국도로학회

4,000원

6.

2008.10 구독 인증기관 무료, 개인회원 유료

시험도로와 포장가속시험 결과를 이용한 Surface Rutting 예측 알고리즘 개발

Development of Algorithm for Using Test Road and APT Test Results to Predict Surface Rutting