CALCULATION OF VERTICAL STEEL TANK (VOLUME 5000 m3) STRESS-STRAIN STATE UNDER HORIZONTAL SEISMIC ACTION IN THE SOFTWARE PACKAGE ANSYS

Abstract

Russia is one of the largest suppliers of oil in the world market, and therefore the problem of oil storage is one of the main for oil companies. The development of the infrastructure of oil trunk transportation facili- ties, the emergence of new supply routes necessitates the construction of warehouses of commercial oil, petroleum products in areas with high seismic activity. In seismically active areas, large-capacity oil ware- houses are operated in the North Caucasus region, which include vertical steel tanks with volume up to 100 thousand m3. To ensure tanks safe operation, it is necessary to develop and improve approaches to the cal- culation of seismic resistance of such facilities. Oil and gas production facilities are classified as hazardous production facilities, which in case of accidents pose a serious threat to humans and the environment. Natural disasters (thunderstorms, earthquakes, etc.) are one of the main causes of tank accidents. An analysis of the effects of earthquakes shows that reservoirs can suffer significant damage. Despite some progress made in recent years in this segment of production, oil and petroleum products tanks remain among the most vulnerable to seismic effects. Therefore, the problem of ensuring the strength of cylindrical tanks for storage of petroleum products is important and very relevant. Also, the relevance of this issue is due to the increasing, according to recent data, the seismic activity of the planet. In the center of the earth- quake breaks occur and intense inelastic deformation of the medium. Deformations in the hearth are irreversible, and in the area external to the hearth, are continuous, elastic and mostly reversible. It is in this area that seismic waves propagate.