2025 Volume 81 Issue 13 Article ID: 24-13508
A basic study on a seismic response analysis of large-scale structures such as nuclear power plant buildings considering seismic uplift was conducted to improve the quality of seismic response analysis by high-fidelity finite element model and to pursue the rationality of the model. In addition to the usual finite element model in which the ground and the structure are combined, another model with reduced degrees of freedom was proposed by considering the contact condition between the ground and the structure. The results obtained from the analysis suggest that the high-fidelity finite element model may be able to consider the effects of foundation deformation and building geometry when considering the uplift of large-scale structures. In addition, it was shown that reducing the number of degrees of freedom by considering the contact condition is superior in terms of computational cost and can be used as a reasonable model in future seismic response analysis.
