Study simulation of shallow foundation behavior using different finite element models
M. Waheed1,*, N. Asmael2
Simulation of shallow foundation using different FEM was studied.
Behavior of small and large scale shallow foundation in clayey soil was determined.
For a small scale, the hardening soil model is more realistic.
In case of large scale, the three simulation models can be used.
The hardening soil model is the best for a large scale.
The behavior of the shallow foundation depends mainly on the soil supporting it. The numerical programs provide simulation of soil behavior in large scale that cannot be conducted practically. It represents a great benefit of numerical analysis. The computer program should include the appropriate material model to produce realistic and logical results. This paper aims to study simulation of shallow foundation using different models of finite elements and comparing the numerical result with experimental one. The Plaxis-3D program is used for developing the numerical models. Three models are utilized during modeling soil behavior, i.e. Mohr-Coulomb, Hardening and soft soil model. The behavior of small and large scale shallow foundation under axial loading in clayey soil was studied. The purpose of this study is to assess and compare the result of modeling with the experimental one to find which model can better predict the soil behavior. It is found that for the small scale foundation, the simulation of the Mohr-Coulomb model matches the load-settlement curve at the initial straight portion and then over predicts, so a great care must be taken to use this model. The soft soil (creep) model gives the straight line response to a wide range which is invalid (compared with the experimental curve). The representation using the hardening soil model is more realistic and gives better results. In case of the large scale foundation, these three models can be used for simulation, where the simulation of the hardening soil model is the best.