For a proper analysis (rather than the usual assumed depth to fixity) the problem is a beam on elastic foundation with variable lateral spring stiffness.
The usual numerical solution is to discretise the pile and soil into somewhere between 10 and 20 elements. Where the load is nominally static, simple lateral springs can be used to represent the soil. If a dynamic load is important, some estimate of the damping coefficient of the soil is required to be added, and a dynamic FE model will be needed.
With very soft soils, the issue of slow lateral movement of the pile through the soil should be carefully considered.
Dr Harry Poulos has published considerable on this issue.
Method above agreed. Most probably one of the easyest methods to generate an adequate result.
Be sure you are avare of the lateral forces within the springs. They need to be set in relation to the max. admissible resistance provided by the soil.
Hello,
I used PLAXIS 2D to model a single pile and pile groups subjected to lateral load on top at natural ground surface.
Pile model: The pile is modeled using plate elements. The beam elements are based on Mindlin’s beam theory.
Soil model: Mohr-Coulomb, Hardening Soil and Linear Elastic models are selected for analyses.
Boundary conditions: The bottom boundary is rigid. Standard fixities are used at the left and right boundaries of the model.
Interface element: The soil-structure interaction is modeled using an elastic-plastic model to describe the behavior of interfaces.
I hope this may help you.
Can someone give me a step by step procedure to simulate a pile test in plaxis 3d 2013
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