During the construction of the high-piled wharf, cracks may be induced in the top zone of the pre-stressed high-strength concrete pipe pile due to the high-frequency hitting. In this paper, the influence of the construction-induced damage and cracks on the mechanical properties of prestressed reinforced concrete (RC) pipe piles is studied. Finite element analysis is used to simulate the mechanical behaviour of the RC pipe piles with construction-induced damage and the corresponding ultimate bearing capacity of the damaged RC piles is predicted. Influence of different lengths of the construction-induced damage zone and maximum crack widths within the damage zone on the mechanical behaviour of the RC pipe pile is discussed. Results indicate that, the ultimate bearing capacity of the RC pipe piles with construction-induced damage in the top zone of the pile is reduced due to the damage. The failure of the RC pipe piles with construction-induced damage may occur at both the bottom and middle part of the pile for longer damage length and wider maximum crack width.

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Modelling the Mechanical Behaviour of the RC Pipe Pile with Construction-Induced Damage and Cracks

  • Weixin Yu,
  • Xiaohui Wang

摘要

During the construction of the high-piled wharf, cracks may be induced in the top zone of the pre-stressed high-strength concrete pipe pile due to the high-frequency hitting. In this paper, the influence of the construction-induced damage and cracks on the mechanical properties of prestressed reinforced concrete (RC) pipe piles is studied. Finite element analysis is used to simulate the mechanical behaviour of the RC pipe piles with construction-induced damage and the corresponding ultimate bearing capacity of the damaged RC piles is predicted. Influence of different lengths of the construction-induced damage zone and maximum crack widths within the damage zone on the mechanical behaviour of the RC pipe pile is discussed. Results indicate that, the ultimate bearing capacity of the RC pipe piles with construction-induced damage in the top zone of the pile is reduced due to the damage. The failure of the RC pipe piles with construction-induced damage may occur at both the bottom and middle part of the pile for longer damage length and wider maximum crack width.