Nonlinear seismic response of a partially-filled rectangular liquid tank with a submerged block

摘要: Abstract The seismic response of partially-filled two-dimensional rigid rectangular liquid tanks with a bottom-mounted submerged block is numerically simulated. Galerkin-weighted-residual based finite element method (FEM) used for solving the governing Laplace equation fully nonlinear free surface boundary conditions and also velocity recovery. Based on mixed Eulerian–Lagrangian (MEL) method, fourth order explicit Runge–Kutta scheme time-stepping integration conditions. A cubic-spline fitted regridding technique at every time step to eliminate possible numerical instabilities account Lagrangian node induced mesh distortion. An artificial damping term mimic viscosity damping. Three different earthquake motions characterized basis low, intermediate high frequency contents are study effect content dynamic this tank-liquid-submerged system. impulsive convective components hydrodynamic forces manifested in terms base shear, overturning moment pressure distribution along tank wall as well has been quantified vis-a-vis ground motions. It observed that tank-liquid system highly sensitive motion.