![geofoam model in flac3d geofoam model in flac3d](https://i1.rgstatic.net/publication/315714257_Assessment_of_Lateral_Earth_Pressure_Reduction_Using_EPS_Geofoam-A_Numerical_Study/links/58de23b192851cd2d3e3c00e/largepreview.png)
Also, the isolation efficiency of geofoam inclusion against the permanent displacement, A d, and application point of the seismic force to the yielding retaining wall were investigated. In the present study at seismic record of the near-field, EPS geofoam showed a better performance than the far-field record in reduction of lateral forces. According to the results, the isolation efficiency of geofoam inclusion against the forces imposed to the retaining wall, A P, was achieved in static condition more than dynamic condition. Retaining walls at the heights of 6 and 9 m and two types of EPS geofoam, EPS15 (γ = 0.15 kN/m 3) and EPS20 (γ = 0.2 kN/m 3), were modeled at relative thicknesses (t/H) of 0.1 and 0.2. Two earthquake records were selected for present research: far-field and near-field.
![geofoam model in flac3d geofoam model in flac3d](https://i.ytimg.com/vi/xIFr5E-rDMQ/maxresdefault.jpg)
In order to evaluate the performance of geofoam inclusions, parameters such as wall height, type of retaining wall (yielding and non-yielding types), density and thickness of geofoam inclusion were studied.
#Geofoam model in flac3d software#
The parametric study results revealed that the geocell modulus and the interface friction angle directly influence the performance of geocell reinforced bed under dynamic loading condition.In the present numerical study, using the finite difference software FLAC (version 7), the effect of EPS geofoam inclusions was investigated on the improvement of the retaining walls response in static and dynamic conditions. Further, the parametric study was conducted to investigate the effect of different geocell properties on the dynamic behaviour of reinforced foundation bed. With the help of HSA technique, the effect of confinement area and the height of geocell in reducing the amplitude of vibration was investigated. Further, it was noticed that the modelling of geocell through the HSA approach provided the accurate prediction of the experimental results.
![geofoam model in flac3d geofoam model in flac3d](https://itasca-int.objects.frb.io/assets/img/site/software/wharfs.jpg)
The elasticity of the foundation bed was improved by 102% with the provisions of geocell. Similarly, 42% change of resonant frequency was observed as compared to the unreinforced condition. From the results, 56% reduction in displacement amplitude was observed in the presence of geocell reinforcement. The isolation efficiency of the confined cell was determined in terms of the reduction in displacement amplitude, peak particle velocity, and the improvement in elasticity of the foundation bed. The 3D cellular confinement was simulated using two techniques, namely, Equivalent Composite Approach (ECA), and Honeycomb Shape Approach (HSA). Primarily, the numerical model was validated with the results of field resonance tests, performed on the foundation beds reinforced with and without cellular confinement systems. The numerical analysis was carried out using the three dimensional explicit finite difference package FLAC 3D. This paper investigates numerically the potential use of cellular confinement systems in isolating the machine induced vibrations.