A BEMFEM convolutional approach to the unilateral contact problem of seismic soilpipeline interaction
A numerical approach is presented for seismic soilpipeline interaction considered as an inequality problem of structural engineering. Thus the unilateral contact conditions due to tensionless and elastoplastic softeningfracturing behaviour of the soil as well as gapping are taken into account. The numerical approach is based on a double discretization, on a Laplace transformation of the equality problem conditions to convolutional ones and on mathematical programming. The number of problem unknowns is therefore significantly reduced and a non-convex linear complementarity problem is solved in each time step.
unilateral contact problems coupling fem and bem