Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Multi-Scale Approach for Near-Surface Pavement Cracking and Failure Mechanism. USDOT Region V Regional University Transportation Center Final Report
Near-surface cracking is one of the predominant distress types in flexible pavements. The occurrence of near-surface cracking, also sometimes referred to as top-down cracking, has increased in recent years with the increased construction of relatively thick flexible pavements. However, understanding the mechanisms of near-surface cracking and its integration into pavement design protocols remains a challenge. A mechanistic-empirical approach requires a thorough understanding of the mechanisms of cracking on the surface or in the proximity of tires as well as an experimental characterization simulating field failure conditions. The analysis of this problem can become a very complex task due to multi-axial stress states in the vicinity of tires. This study investigated the near-surface response to non-uniform tire contact stresses and analyzed the potential for occurrence of cracks near the surface in a typical relatively thick flexible pavement structure. The Generalized Finite Element Method (GFEM) was utilized to analyze the pavement structures in three-dimensions (3-D) considering the viscoelastic effects. This method provided a computational framework where arbitrary orientation of cracks in a finite element mesh is possible.
Multi-Scale Approach for Near-Surface Pavement Cracking and Failure Mechanism. USDOT Region V Regional University Transportation Center Final Report
Near-surface cracking is one of the predominant distress types in flexible pavements. The occurrence of near-surface cracking, also sometimes referred to as top-down cracking, has increased in recent years with the increased construction of relatively thick flexible pavements. However, understanding the mechanisms of near-surface cracking and its integration into pavement design protocols remains a challenge. A mechanistic-empirical approach requires a thorough understanding of the mechanisms of cracking on the surface or in the proximity of tires as well as an experimental characterization simulating field failure conditions. The analysis of this problem can become a very complex task due to multi-axial stress states in the vicinity of tires. This study investigated the near-surface response to non-uniform tire contact stresses and analyzed the potential for occurrence of cracks near the surface in a typical relatively thick flexible pavement structure. The Generalized Finite Element Method (GFEM) was utilized to analyze the pavement structures in three-dimensions (3-D) considering the viscoelastic effects. This method provided a computational framework where arbitrary orientation of cracks in a finite element mesh is possible.
Multi-Scale Approach for Near-Surface Pavement Cracking and Failure Mechanism. USDOT Region V Regional University Transportation Center Final Report
H. Ozer (Autor:in) / C. Duarte (Autor:in) / I. L. Al-Qadi (Autor:in)
2010
65 pages
Report
Keine Angabe
Englisch
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