Elastic-plastic pile-frames interaction

Book chapter, 2026

A FE-algorithm for small deformation incremental plasticity is presented for the analysis of a plane frame interacting with a piled foundation. Both the frame and the piles, consisting of an elasto-plastic material, are analysed by using beam variables. For the interaction with the soil medium, non-linear load transfer functions are used. The solution of the non-linear equations arizing from the discretization is obtained by a Newton iteration procedure optimized by’slack’ line search. A few examples show the structural response for proportional, non-proportional and cyclic loading.