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Ultimate Capacity Analysis and Determination of the Position of Failure Surface for Uplift Piles

Author:
Su, Qian  Zhang, Xiaoxi  Yin, Pingbao  Zhao, Wenhui  


Journal:
MATHEMATICAL PROBLEMS IN ENGINEERING


Issue Date:
2014


Abstract(summary):

Ultimate capacity and failure surface position of uplift piles are dependent on soil parameters. In this paper, the horizontal slice method is used to discuss the relation among the ultimate uplift capacity, the failure surface position, and soil parameters with Mohr-Coulomb failure criterion. According to the limit equilibrium analysis, the ultimate uplift capacity is calculated by dividing soil around the pile into slices with considering the potential failure surface as a group of several sectional planes. Then the multivariate function used to calculate ultimate capacity is established and optimized by the sequential quadratic programming. Through the numerical calculation and comparison with the previous research, the results show that the method is reasonable and effective and can be used to determine the failure surface and the magnitude of the ultimate capacity of uplift piles.


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