Amirkabir University of Technology Amirkabir Journal of Civil Engineering 2588-297X 54 9 2022 11 22 Effect of Number and Type of Soil Layers on the Response of Buried Structures to Explosion Effect of Number and Type of Soil Layers on the Response of Buried Structures to Explosion 3451 3470 4751 10.22060/ceej.2022.19195.7100 FA Mobin Hematyan Department of Civil Engineering, Bushehr Branch, Islamic Azad University, Bushehr, Iran Hadi Dashti Department of Civil Engineering, Bushehr Branch, Islamic Azad University, Bushehr, Iran Journal Article 2020 10 31 In the field of buried or underground structures, the objective of passive defense is to properly design, improve and place such structures. Among the best methods to analyze the problems are numerical and computer models. In the present research, using the previous results, the accuracy of surface explosion loading modeling results was evaluated. Moreover, the structures buried in different soils and the layered system were investigated after ensuring these models. To model the effect of soil-structure interaction, the analysis is performed non-linearly using Abaqus software. The structure is buried in the soil as a single layer, double layers, and triple layers with a burial depth of 8 m above the ground while comparing the displacement and stress. The soils used in this research are soft sand, hard sand, and clay. The results show that the highest displacement is related to the placement of the first layer of soft sand, the second layer of hard sand, and the third layer of clay. However, the lowest amount of displacement is associated with a single layer of soft sandy soil. Also, changes in the material and the number of layers sometimes lead to a reduction of more than 100% and 19% respectively in the resulting stresses and the displacement in the buried structure. This issue shows the necessity of the effect of soil layering in the design of buried structures. In the field of buried or underground structures, the objective of passive defense is to properly design, improve and place such structures. Among the best methods to analyze the problems are numerical and computer models. In the present research, using the previous results, the accuracy of surface explosion loading modeling results was evaluated. Moreover, the structures buried in different soils and the layered system were investigated after ensuring these models. To model the effect of soil-structure interaction, the analysis is performed non-linearly using Abaqus software. The structure is buried in the soil as a single layer, double layers, and triple layers with a burial depth of 8 m above the ground while comparing the displacement and stress. The soils used in this research are soft sand, hard sand, and clay. The results show that the highest displacement is related to the placement of the first layer of soft sand, the second layer of hard sand, and the third layer of clay. However, the lowest amount of displacement is associated with a single layer of soft sandy soil. Also, changes in the material and the number of layers sometimes lead to a reduction of more than 100% and 19% respectively in the resulting stresses and the displacement in the buried structure. This issue shows the necessity of the effect of soil layering in the design of buried structures. https://ceej.aut.ac.ir/article_4751_ebad33b3c9fa1d10327bb55f9e79e2f3.pdf