Numerical study of the 3D failure envelope of a single pile in sand |
| |
| Institution: | 1. LUNAM Université, IFSTTAR, GERS, SV, F-44341 Bouguenais, France;2. LUNAM Université, Ecole Centrale de Nantes, Université de Nantes, CNRS, Institut de Recherche en Génie Civil et Mécanique (GeM), 1 Rue de la Noë, F-44321 Nantes, France;1. Technology and Engineering Solutions, Vestas Wind Systems A/S, Hedeager 42, 8200 Aarhus, Denmark;2. Department of Civil Engineering, Technical University of Denmark, 2800 Lyngby, Denmark;3. Department of Civil Engineering, Aalborg University, Sohngårdsholmsvej 57, 9000 Aalborg, Denmark;1. College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, Guangdong, PR China;2. Key Laboratory of Coastal Urban Resilient Infrastructure (MOE), Shenzhen University, Shenzhen 518060, Guangdong, PR China;3. Shenzhen Key Laboratory of Green, Efficient and Intelligent Construction of Underground Metro Station, Shenzhen University, Shenzhen 518060, Guangdong, PR China;1. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong;2. Research Institute of Civil Engineering and Mechanics (GeM), UMR CNRS 6183, Ecole Centrale de Nantes, Nantes, 44321, France;3. University of Lyon, INSA Lyon, Laboratoire GEOMAS, Villeurbanne 69621, France;1. National Technical University, Athens, Greece;2. University of Davis, CA, United States |
| |
| Abstract: | The paper presents a comprehensive study of the failure envelope (or capacity diagram) of a single elastic pile in sand. The behavior of a pile subjected to different load combinations is simulated using a large number of finite element numerical calculations. The sand is modeled using a constitutive law based on hypoplasticity. In order to find the failure envelope in the three-dimensional space (i.e. horizontal force H, bending moment M and vertical force V), the radial displacement method and swipe tests are numerically performed. It is found that with increasing vertical load the horizontal bearing capacity of the pile decreases. Furthermore, the presence of bending moment on the pile head significantly influences the horizontal bearing capacity and the capacity diagram in the H–M plane manifests an inclined elliptical shape. An analytical equation providing good agreement with the 3D numerical results is finally proposed. The formula is useful for design purposes and the development of simplified modeling numerical strategies such as macro-element. |
| |
| Keywords: | 3D failure envelope Capacity diagram Pile Hypoplasticity Radial displacement tests Swipe tests Analytical equation Sand |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
