Linear and non linear numerical analysis of foundations by Bull J.W. (ed.)

By Bull J.W. (ed.)

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Sample text

Many computer codes have been especially written based on the ‘t-z’ approach [6–8], while the method can be simply implemented into finite element or finite difference general codes. However, it should be noted that an accurate evaluation of the ‘t-z’ relationships, even in the case where adequate geotechnical data are available, is always questionable and in most cases empirically derived. This could be considered as the main drawback of the method. Three-dimensional non-linear analyses, on the other hand, may be very computationally demanding, depending upon the size of the problem.

Baecher, G. B. : Northwestern University, pp. 220–46. Baecher, G. B. and Christian, J. T. (2003) Reliability and Statistics in Geotechnical Engineering, Chichester: John Wiley. Becker, D. E. (2001) Site characterization, in Geotechnical and Geoenvironmental Engineering Handbook, ed. R. : Kluwer Academic Publishers, pp. 69–106. Boone, S. J. (2004) Evaluating damage to buildings from settlement and constructioninduced movement, The International Conference on Structural and Foundation Failures, Singapore, pp.

However, in the particular case of a pile in a homogeneous or even stratified soil profile under vertical loading, a 2D axisymmetric approach could be applied. Numerical simulation of a pile using 1D elements and an idealization of soil response by discrete springs with linear or multilinear branches, well known as the ‘t-z’ approach, represents further simplifications of the issue. Owing to the limited number of degrees of freedom, the required computational time is practically negligible, rendering the method most attractive.

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