Nonlinear time-domain soil–structure interaction analysis of embedded reactor structures subjected to earthquake loads

摘要: Abstract A generalized time-domain method for soil–structure interaction analysis is developed, based upon an extension of the work domain reduction Bielak et al. The methodology combined with use a simple hysteretic soil model Ramberg–Osgood formulation and applied to notional Small Modular Reactor. These benchmark results compare well (with some caveats) those obtained by using industry-standard frequency-domain code SASSI. provides path forward investigation other sources nonlinearity, including associated more physically-realistic material models incorporating pore-pressure effects, gap opening/closing, effect nonlinear structural elements, 3D seismic inputs.