Effects of Flexural Rigidity Ratio of Footing Beam to Column of Cylindrical Lattice Shell Roofs on Dynamic Interactions with Multi-layered Soil

In the seismic response of buildings, it is understood that phase differences and amplitude differences arise due to the heterogeneity of the soil, and that the dynamic interaction between the soil and the structure differs. The properties of the soil are one of the factors that influence the seismic response of structures, and to analyze this effect, it is necessary to consider the coupled effect with the soil in seismic response analysis. Therefore, this paper is intended as an investigation of the effects of the flexural rigidity ratio k of the footing beams to the columns of spatial structures built on horizontally divided soil, on the free vibration characteristics and the seismic response behavior of the structures, taking into account the coupling with the soil. In addition, the differences in response characteristics with and without coupling to the soil are also investigated.