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Geomechanics and Engineering
  Volume 8, Number 6, June 2015, pages 769-781
DOI: http://dx.doi.org/10.12989/gae.2015.8.6.769
 


An analytical analysis of a single axially-loaded pile using a nonlinear softening model
Yue-dong Wu, Jian Liu and Rui Chen

 
Abstract
    (1) Yue-dong Wu, Jian Liu: Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; (2) Yue-dong Wu, Jian Liu: Geotechnical Research Institute, Hohai University, Nanjing 210098, China; (3) Rui Chen: Shenzhen Key Laboratory of Urban and Civil Engineering for Disaster Prevention and Mitigation, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen University Town, Xili, Shenzhen, China.The skin friction of a pile foundation is important and essential for its design and analysis. More attention has been given to the softening behaviour of skin friction of a pile. In this study, to investigate the load-transfer mechanism in such a case, an analytical solution using a nonlinear softening model was derived. Subsequently, a load test on the pile was performed to verify the newly developed analytical solution. The comparison between the analytical solution and test results showed a good agreement in terms of the axial force of the pile and the stress-strain relationship of the pile-soil interface. The softening behaviour of the skin friction can be simulated well when the pile is subjected to large loads; however, such behaviour is generally ignored by most existing analytical solutions. Finally, the effects of the initial shear modulus and the ratio of the residual skin riction to peak skin friction on the load-settlement curve of a pile were investigated by a parametric analysis.
 
Key Words
    nonlinear softening model; single pile; land-transfer mechanism; skin friction; analytical analysis
 
Address
(1) Yue-dong Wu, Jian Liu:
Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;
(2) Yue-dong Wu, Jian Liu:
Geotechnical Research Institute, Hohai University, Nanjing 210098, China;
(3) Rui Chen:
Shenzhen Key Laboratory of Urban and Civil Engineering for Disaster Prevention and Mitigation, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen University Town, Xili, Shenzhen, China.
 

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