Analysis of Vibro-Isolated Building Excited by the Technical Seismicity of Traffic Effects

By location of a building in the vicinity of underground tube structure the effect of train operation excites the groundborne vibration. The solution of vibration transfer from the subsoil environment to the building structure is demonstrated using the example of a multistorey reinforced concrete building. The application of an elastic layer at foundation base level is used in order to eliminate excessive vibrations of these technical seismicity effects. The building is loaded by the non-stationary history of vibrations in accelerations. The measured time histories in acceleration were selected and then the typical history was used as an input for a dynamic analysis of the structure. Two 3-D numerical models of the building take into account the individual storeys, firstly modelled with vibro-isolation of building and secondly without this elastic part. The elastic layer was considered as the elastic subsoil of the Winkler-Pasternak model below the whole area of the upper part of the dual foundation plate and as the elastic support for columns and walls above the piles on the upper foundation plate level. The response prediction for vibro-isolated and non-isolated structure is compared and discussed. In the conclusion, the methodology of vibro-base isolation is evaluated. Keywords— Analysis, building, validation, vibro-isolation.