Abstract:
In the past, research on structural uplift focused mainly on the rocking of structures which were assumed to be rigid and supported by rigid ground. The contribution of structural flexibility and soil-structure interaction (SSI) were neglected. In this work, shake table tests were conducted to investigate the response of a single-degreeof-freedom (SDOF) system to earthquakes excitations. The SDOF system was a scaled model of a multi-storey RC building. A sand box was used to simulate the effect of subsoil. A comparison of both cases of rigid and sand supports showed that uplift of structures decreased activated bending moments, the maximum horizontal acceleration but increased horizontal displacement. It was also found that frequent uplift may not provide further reduction of structural responses.
