Abstarct: Abstract Soil is a porous medium that normally consists of three phases: solid, liquid and gas. The solid phase is the particles and grains that make up the soil environment, the liquid phase includes water or other liquids that are placed between the holes in the soil environment, and the gas is the air between the soil particles. When the soil reaches the condition of saturation, all the holes in it are filled with water. In the normal state, the force and stress that is applied to the soil environment is distributed between the two main parts of solid particles and water in the environment. The total stress applied to the solid and liquid phase is called total stress, and the stress exchanged between soil particles is called effective stress. In a general definition, soil liquefaction is a phenomenon in which the soil loses its strength and hardness under factors such as earthquakes or any other force that has a relatively high frequency and intensity, and behaves similar to the behavior of a liquid. In other words, liquefaction is a process in which sediments remaining at levels below the water level temporarily or permanently lose their properties, including strength and hardness, and behave as a liquid with viscous behavior instead of a solid. After liquefaction, the soil has little shear resistance and there is a possibility of extensive and deep deformations in such a way as to cause major damages to the upper structure. The amount of cement or clay in soil particles depends on the amount of drainage limitation (water draining from the soil environment). Also, the amount of deformation of the soil depends on the softness of the constituent materials, the thickness and extent of the liquefied laxyer materials, the slope of the ground and the distribution of transfer loads from the building or its adjacent structures. On the other hand, some structures, such as storage tanks for petrochemical products (oil, gasoline, diesel, etc.), for several reasons, including geographical and environmental conditions, must be built next to the coasts and close to the sea, which have soil with the possibility of Saturation and liquefaction are high. Also, baxsed on engineering principles, one of the most optimal foundations for maintaining these structures is circular foundations. Circular foundation is a suitable and economic foundation for maintaining structures including telecommunications towers, oil tanks, water and air sources and in general for most structures with axial symmetry relative to the central axis perpendicular to the foundation due to less consumption of materials. And in case of scientific justification, its use is much more affordable than circular and rectangular foundations. Since the aforementioned structures have high dimensions and weight, they should be investigated from various aspects such as foundation settlement, liquefaction in the soil environment below the structure, soil bearing capacity, and the rotation of the structure. In this thesis, the MIDAS GTS NX finite element software, which is a powerful software in the field of geotechnical and structural analysis, has been used to investigate the performance of the annular foundation during the liquefaction of the soil environment. The variables studied in this research include the ratio of the inner radius to the outer radius of the annular foundation, the amount of compaction in the soil environment under the foundation, which is used to investigate the occurrence of liquefaction and disturbance in the seismic performance of this category by applying acceleration maps at the baxse level to the structures. It has been paid from the foundations. As a result of the analysis, it has been determined that in some accelerations of the input maps, the amount of liquefaction in the soil increases with the increase in the ratio of the inner to outer radius of the foundation. On the other hand, with the increase of the maximum ground acceleration, which is called PGA 1 for short, the pore water pressure ratio, which is determined by the RU parameter in this research, increases in the first seconds of the earthquake. Also, with the increase of density in the soil environment, the liquefaction parameter decreases. In another result obtained from the analyzes performed on the models, it can be stated that the performance of annular foundations is relatively better in terms of the amount of settlement compared to solid circular foundations and registers less settlement.