New Asphalt Pavement Failure Criterion Based on Unified Strength Theory

• Published in: Journal of Wuhan University of Technology. Materials science edition Vol. 30; no. 3; pp. 528 - 532
• Main Authors: Yang, Qun, Chen, Lu, Wang, Ping, Dai, Jingwang
• Format: Journal Article
• Language: English
• Published: Wuhan Wuhan University of Technology 01.06.2015; Springer Nature B.V
• Subjects: Asphalt; Cementitious Materials; Chemistry and Materials Science; Criteria; Failure; Materials Science; Materials selection; Pavements; Shear stress; Strength; Stresses; 中间主应力; 应力分布规律; 抗压强度比; 沥青混合料; 沥青路面; 破坏准则; 统一强度理论; 路面材料; asphalt pavement; unified strength theory; strength theory
• DOI: 10.1007/s11595-015-1184-8
• ISSN: 1000-2413

This study aims to introduce an appropriate analytical method for asphalt pavement based upon unified strength theory （UST）. The traditional maximum shear stress strength theory （MSST） cannot describe the marked difference between tension strength and compressive strength or variable intermediate principal stress, which significantly affects the geotechnical materials. Our studies try to find a new asphalt pavement failure criterion that considers the influence of both tension-compression strength ratio and intermediate principal stress of asphalt mixture. In order to select a suitable theory on pavement material, the UST is introduced and compared with the traditional theory. Results show that the tension-compression strength ratio of asphalt mixture, which is used as a material parameter, dramatically affects the stress and stress distribution law in pavement; the pavement stress level increases dramatically after considering the intermediate principal stresses. Therefore, the UST which considers both tension-compression strength ratio and intermediate principal stress is more in line with the material characteristics of asvhalt pavement.