In order to define the right effective strength parameters for this model, based on the undrained shear strength, a small investigation was performed. During an earthquake, the soil behaviour is assumed to be undrained. Based on soil investigation from Groningen, a silty clay layer was defined and used as a one layered soil profile of 20 m depth. This should give a better approximation of the pile response when compared to 3D calculations or measurements. With this option, plastic behaviour is now incorporated into the 2D pile behaviour. In the latest version of PLAXIS (2015) a limiting lateral soil resistance can be defined. They depend mainly on the pile to pile distance specified for the embedded beam. These interfaces (springs) are defined by the interface stiffness factor, which are determined and validated in previous master thesis projects for mostly axial loading. The embedded beam (row) within PLAXIS 2D is in fact a 2.5D situation, where the pile (or beam) is connected to the soil elements of the FEM by special interfaces.
#How to model a pile in plaxis 2d free#
Static pushover analysis, free field site response analysis of the Groningen situation and the kinematic loading of the embedded pile will be addressed. In this aspect a study on the possibilities and limitations of the embedded beam (row) within PLAXIS 2D will be performed. The main one, which is also applied in this master thesis, is by performing 2D FEM analyses on the soil and subsequently the pile behaviour. There are several ways of approximating the soil-pile behaviour during an earthquake. However, the influence of these human induced earthquakes on pile foundations and an easy and time efficient FEM calculation method is not yet available or well described in Dutch literature. Apart from the complex numerical models for masonry and the effect of earthquake loading on these structures, a lot of research is currently performed on the soil properties and its effect on the wave propagation. In the last few years the research activities on the effect of human induced earthquakes on (piled) foundations has grown enormously. Modelling of dynamic pile behavior during an earthquake using PLAXIS 2D: Embedded beam (row)
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