Behavior of the Liquid Storage Tank Under Coupled Effect of Bidirectional Excitations and Angle of Incidence of Earthquake

The liquid storage tanks (LSTs) are the paramount structures in oil, nuclear and various chemical industries. The structural properties and sloshing of stored fluid can significantly alter the nature of the seismic response. Several failure incidences of LSTs are available in history because of earthquakes. Despite exhaustive research on this topic, the behavior of the rectangular steel LSTs under the near-field earthquake and long period far-field earthquakes demands more attention for a more stable design. The finite element (FE) analysis of LST is done on the ABAQUS platform. The behavior of the LSTs is studied by varying the angle of incidence of the earthquakes and the ratio between the different components of the earthquake. The resultant response due to bidirectional interaction and angle of incidence shows an increase in sloshing height; von Mises stress and top board displacement.