Dissertation > Transportation > Road transport > Road works > Roadbed, pavement engineering > Pavement Engineering > Road : use of the material points > Asphalt Pavement

Numerical and Experimental Studies for Multi-Cracks of Asphalt Pavement with Semi-Rigid Basement Asphalt

Author ZhangCheng
Tutor MiaoYu
School Huazhong University of Science and Technology
Course Geotechnical Engineering
Keywords Asphalt Pavement Multiple cracks Viscoelastic Finite Element Method Stress intensity factor Temperature stress Dynamic Response Extended Analysis
CLC U416.217
Type Master's thesis
Year 2010
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Semi- rigid asphalt pavement cracking problem has become a problem that can not be ignored in the highway construction , semi- rigid asphalt pavement with multiple cracks , explore the characteristic temperature loads and traffic loads has important theoretical and practical significance. This paper studies the mechanical behavior of asphalt pavement with multiple cracks and crack propagation , the main contents are as follows : 1, an overview of the level of research and development in related fields at home and abroad , using the generalized Maxwell model to simulate the viscoelastic properties of the asphalt mixture . 2 , the effect of temperature changes in the response of asphalt pavement containing multiple cracks finite element simulation analysis . First, based on the theory of heat transfer of road temperature field calculation and analysis, Second, this temperature field pavement temperature stress load analysis . The multiple crack spacing changes of temperature stress and the crack tip stress intensity factor . 3 , binding kinetics and fracture mechanics theory , modal analysis and transient analysis , analysis of dynamics of semi- rigid asphalt pavement with multiple cracks under traffic loads . Discuss moving vehicular loads , multiple crack spacing changes of the crack tip stress field and the stress intensity factor . 4 , combined with a road-building project in Henan , were analyzed by the numerical simulation of crack propagation path of semi- rigid asphalt pavement with multiple cracks under traffic loads , respectively modulus of the surface layer , base modulus , the thickness of the surface layer , the grassroots thickness as well as the relative position of multiple cracks crack propagation by laboratory experiments , derived asphalt trabecular crack propagation path , and were compared with the results of numerical simulation , both in good agreement .

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