Quantification of nonlinear seismic response of rectangular liquid tank

摘要: Seismic response of two dimensional liquid tanks is numerically simulated using fully nonlinear velocity potential theory. Galerkin-weighted-residual based finite element method used for solving the governing Laplace equation with free surface boundary conditions and also recovery. Based on mixed Eulerian-Lagrangian (MEL) method, fourth order explicit Runge-Kutta scheme time integration conditions. A cubic-spline fitted regridding technique at every step to eliminate possible numerical instabilities account Lagrangian node induced mesh distortion. An artificial damping term which mimics viscosity brings in stability. Four earthquake motions have been suitably selected study effect frequency content dynamic tank-liquid system. The seismic vis-a-vis linear rectangular tank has studied. impulsive convective components hydrodynamic forces, e.g., base shear, overturning moment pressure distribution tank-wall are quantified. It observed that system very much sensitive ground motion. Such sensitivity more pronounced shallow tanks.