Ein Modell zur Berechnung des Verformungsverhaltens von horizontal hochzyklisch beanspruchten Pfählen

A model for the behavior of horizontally high-cycle loaded piles

For the prediction of the deformation for long or intermediate long piles under lateral high cycle load, embedded in non-cohesive soil, a simplified engineering model for drained conditions is developed based on the high cycle accumulation (HCA) model of NIEMUNIS, WICHTMANN and TRIANTAFYLLIDIS [1]. The monotonic soil deformation under static load is approximated by elastic springs, placed around the pile, whereas the accumulation of soil deformations under cyclic loading is modelled by viscous dashpots (cyclic creep) according to the HCA model. In most instances this contemplation is physically validated by element tests. In conjunction with the pile the spring-dashpot elements represent an elastically embedded beam system. Two versions of the model with a two-sided arrangement of springs and dashpots on the Lee- and Luv-side and a one-sided arrangement only on the Lee-side will be presented. The pile displacement prediction of the model is compared with the results obtained by existing engineering models already known in the literature and the solution of a 3-D-finite element simulation with the HCA model.