Pallet rack systems used to store cargo in logistics warehouses can collapse during earthquakes, causing progressive collapse of the entire rack. In this study, a coupled analysis method was developed to calculate the contact force based on the penalty contact theory and to consider the action and reaction forces between the pallet rack system and the cargo. The results of the seismic behavior analysis of the pallet rack system, conducted using the ASI-Gauss code, showed that the natural period changed in varying conditions of the loading levels and weights of the cargoes. In the fully loaded condition, the fall of the cargoes was simulated as the seismic response increased.
ISOBE et al. (2025) studied this question.