PSI - Issue 41

Abdoullah Namdar et al. / Procedia Structural Integrity 41 (2022) 403–411 Author name / Structural Integrity Procedia 00 (2019) 000–000

407

5

subsoil, which the geogrid is not under the embankment. This location of geogrid changes the shear strength of the subsoil in two different locations. Based on considering the economical concept for the construct of the embankment-subsoil, the whole parts of the subsoil did not reinforce and only some part of that was reinforced. The method proposed is to reduce the consumption of steel in the construction industry. The damage mechanism in the presented modeling is limited to the soil. It is assumed owing to the seismic acceleration the geogrid will not be damaged. Moreover, the geogrid movement is based on the geogrid-soil bonding. 3. Results for engineering decision making The concept of the soil-geogrid interaction is associated with the location of the geogrid installs in the subsoil is investigated. To make the embankment-subsoil more strong two locations for geogrid simulated in the subsoil. Figure 3 shows the nonlinear displacement and deformation for models 1, 2, and 3. In model 1 the embankment is collapse with lower nonlinear displacement compared to models 2 and 3. In models 2 and 3, the nonlinear displacement of both models is increasing. When the location of the geogrid changes the loading paths modifying, this phenomenon causes the seismic resistance of the model to appear in a very complicated mechanism. The geogrid is changing the distribution nonlinear displacement mechanism in the subsoil and embankment. According to figure 3 understood the collapse of embankment has more resistance with improving the subsoil shear strength. The collapse mechanism of each model has a different pattern. The results of the numerical simulation revealed that with the installation of the geogrid in the suitable location of the subsoil the vibration pattern of the embankment model changes during the collapse. Realizing the best location could install geogrid in the subsoil causes to improve the flexibility of the embankment subsoil model. The subsoil with higher tensile strength leads to minimization of the nonlinear collapse of the embankment model.

Fig. 3. The nonlinear displacement at the final stage of the simulation of models 1, 2, and 3.

The damage mechanism due to tensile load for steel is reposted (Fernandino et al., 2021), in the present study, in the embankment-subsoil model, when the subsoil is reinforced and nonlinear acceleration will not damage the steel. But the movement of the steel impacts the model seismic resistance. The strength and flexibility of the soil are