Shaking table test for ViBa-Soil-Structure Interaction

The ViBa is a massive structure hosted in a box within the soil and tuned to reduce the vibrations of existing structures in the event of seismic action.It exploits the wellestablished Structure-Soil Structure Interaction (SSSI) mechanism, thereby protecting the built environment in a non-invasive way through its radiated wave field.The efficiency of the ViBa has been proven to date through theoretical, numerical and experimental studies, but it has not yet been tested on a large shake table.Preliminary experimental tests on the 4m 4m shake table at Fuzhou University have been undertaken for the first time to test the efficiency of the ViBa technology for the seismic protection on a realistic case study.A 1:100 model of a Fujan Tulou has been selected for this application.The shake table tests focused on the efficiency of the ViBa buried in the 2m 2m 2m soil box filled with sand.Response-spectrum-compatible ground motion time histories consistent with the Chinese response spectrum have been simulated through a stochastic approach and used for the test.Preliminary results, herein presented, show the Vibrating Barrier did reduce the base acceleration of the Tulou.