New Asphalt Pavement Failure Criterion Based on Unified Strength Theory

• 作 者: 杨群 CHEN Lu 王屏 DAI Jingwang
• 机 构: Key Laboratory of Road and Traffi c Engineering of the Ministry of Education, Tongji University,
• 出 处: Journal of Wuhan University of Technology(Materials Science
• 发表日期: 2015年03期
• 关键词: asphalt pavement compressive Criterion unified affects considering criterion geo

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 asphalt pavement.

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) can not describe the marked difference between tension strength and compressive strength or variable intermediate principal stress, which 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. and compared with the traditional theory. Results show that the tension-compression strength ratio of asphalt mixture, which is used as a material parameter, Therefore, the UST whic h considers both tension-compression strength ratio and intermediate principal stress is more in line with the material characteristics of asphalt pavement.