Effect of loading eccentricity on the ultimate lateral resistance of twin-piles in clay

Soils and Foundations

Fengyuan Wu¹  Lijun Ke¹  Hao Zhang²  Suyun Meng³  Zihao Zhao⁴  Guoqing Zhao⁴  Jim Shiau⁴ 

[1] Jiangsu Research Center for Geotechnical Engineering Technology, Hohai University, Nanjing 210098, China;Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China;

关键词: Piles;    Twin-pile group;    Lateral soil resistance;    Clays;    Numerical limit analyses;    Analytical upper bound plasticity calculations;   

DOI  :  

来源: DOAJ

【 摘 要 】

This paper studies the effect of loading eccentricity and pile spacing on the ultimate lateral soil resistance of twin-piles using finite element limit analysis and analytical upper bound plasticity methods. Two kinematic mechanisms corresponding to the failure modes produced by the advanced finite element simulations are postulated with different eccentricity and pile spacing cases. Comparisons have shown excellent agreements between the two approaches. A series of parametric studies are then subsequently performed. Numerical results have shown that loading eccentricity considerably affects ultimate lateral soil resistance, leading to a maximum reduction of 50%. In addition, the curve of normalised pile resistance versus pile spacing ratio is dissimilar to that without considering the effect of loading eccentricity. The proposed solutions and failure mechanisms in this study will provide a deepened insight on the performance of twin-pile group under eccentric loads.

【 授权许可】

Unknown