차량속도에 따른 연성 포장의 최대인장변형률에 관한 연구

• 영문명: A Study on Maximum Tensile Strain of Vehicle Speeds in Flexible Pavement
• 발행기관: 한국방재학회
• 저자명: 조명환 김낙석 최호근 서영국 Jo, Myoung-Hwan Kim, Nak-Seok Choi, Ho-Geun Seo, Young-Guk
• 간행물 정보: 『3. 한국방재학회 학술대회논문집』2008년, 329~332쪽, 전체 4쪽
• 주제분류: 공학 > 기타공학
• 파일형태: PDF
• 발행일자: 2008.02.28

영문 초록

This study presents a viscoelastic characterization of flexible pavement subjected to moving loads. A series of field tests have been conducted on three pavement sections (A2, A5, and A8) at the Korea Expressway Corporation (KEC) test road. The effect of vehicle speed on the responses of each test section was investigated at three speeds: 25km/hr, 50km/hr, and 80km/hr. During the test, both longitudinal and lateral strains were measured at the bottom of asphalt layers and in-situ measurements were compared with the results of finite element (FE) analyses. A commercial FE package was used to model each test section and a step loading approximation has been adopted to simulate the effect a moving vehicle. Field responses reveal the strain anisotropy (i.e., discrepancy between longitudinal and lateral strains) and the amplitude of strain normally decreases as the vehicle speed increases. In most cases, lateral strain was smaller than the longitudinal strain, and strain reduction was more significant in lateral direction.

키워드

Asphalt Pavement Vehicle Speed Test Road Viscoelastic Step-loading