›› 2012, Vol. 33 ›› Issue (1): 301-306.

• Numerical Analysis • Previous Articles     Next Articles

Research on bearing capacity of inclined uplift pile under wave cyclic loading

FAN Shu-li1，CHEN Jian-yun1，ZHANG Jun-qing2   

  1. 1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China; 2. The Design Institute of Civil Engineering & Architecture, Dalian University of Technology, Dalian, Liaoning 116024, China
  • Received:2010-10-23 Online:2012-01-10 Published:2012-01-17

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Abstract: Accompanying the development of ocean engineering, research on the bearing capacity of pile foundation under the action of wave cyclic loading has been given special attention for the design of offshore structures. Based on the concept of cyclic-softening effect, cyclic strength of the soft soil and Mohr-Coulomb yield criterion are combined together to numerically evaluate cyclic bearing capacity of inclined uplift pile under wave cyclic loading. A perfect elastoplastic finite element method for numerical assessment of bearing capacity of inclined uplift pile is developed. Dynamic ultimate bearing capacity of inclined uplift pile under cyclic loading is studied. The influences of load cycle times, static stress ratio, pile length, pile diameter and pile modulus on the cyclic ultimate bearing capacity of inclined uplift pile are analyzed. It can be concluded that the bearing capacity of the foundation under cyclic loading is less than that of under static load. The effects of wave cyclic loading lead to nonuniform distribution of cyclic strength of soil beside the inclined uplift pile and reduce the cyclic bearing capacity of pile foundation. The results also show that the ultimate bearing capacities of inclined uplift pile improve gradually with the increase of the load inclination, pile length, pile diameter, pile modulus, soil cohesion and soil modulus.

Key words: ocean engineering, wave cyclic loading, cyclic strength, cyclic bearing capacity, pile foundation

CLC Number: 

  • TU 473.1+1
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