Non-linear slosh dynamics of sloped wall tank with bottom-mounted object under seismic excitation

Abstract

The present study deals with the investigation of the non-linear slosh dynamics of a sloped wall tank with bottom-mounted object under seismic excitation. The potential flow theory has been adopted for modeling the liquid domain with a mixed Eulerian-Lagrangian method. The nonlinear seismic response of a sloped wall tank with bottom-mounted rigid internal object is suitably investigated under six different earthquakes. The selected earthquakes are classified based on their PGA/PGV ratios. The base shear force and hydrodynamic pressure are successfully quantified along with the impulsive and convective components. In order to study the influence of the internal object on the hydrodynamic behavior of the liquid tank, a parametric investigation is performed by altering the object's height. The necessity of non-linear analysis is reasonably justified by comparison of the results with those obtained from linear analysis, where a significant difference is observed between the linear and non-linear hydrodynamic responses. The developed non-linear finite element model in the current study is found to be more effective than the linear model and may be employed in designing structure-coupled sloped wall TLDs.