›› 2009, Vol. 30 ›› Issue (6): 1627-1630.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Discussion on nonlinear generalized Winkler model

ZHOU Feng1, 2，ZAI Jin-min1，MEI Guo-xiong1   

  1. 1. College of Civil Engineering, Nanjing University of Technology, Nanjing 210009, China; 2. College of Transportation, Southeast University, Nanjing 210096, China
  • Received:2007-06-27 Online:2009-06-10 Published:2011-03-09

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Abstract:

Without considering continuity and nonlinearity of subgrade is the limitation of Winkler model; and it is modified by Lifking model. However, the effect of foundation shape on coefficient of subgrade reaction considered by Lifking model is excessive. Asymmetry of coefficient of subgrade reaction along long and short sides of rectangular foundation is also caused. Nonlinear generalized Winkler model is presented to overcome the disadvantage of Lifking model, and to redefine the characteristic function of Winkler model. Nonlinear generalized Winkler model not only considers the effect of foundation shape and size on rigidity of subgrade reaction but also simulates several typical forms of subgrade reaction distributions. The nonlinear generalized Winkler model simulates the practical p-s curve by piecewise linear approximation. The nonlinearity of subgrade is also considered. The example results show that nonlinear generalized Winkler model is rational and available.

Key words: Winkler model, nonlinearity, coefficient of subgrade reaction

CLC Number: 

  • TU 4
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