On the 22th of May 2013, during several release tests, in order to acquire the dynamic response of a base-isolated structure, and their soil-structure interaction, several accelerometers have been installed within the structure and on the surrounding soil. The building is located in Augusta City (Italy) an earthquake-prone area. The dynamic behaviour of the structure, together with the soil, has been monitored and analysed. In fact, it is well know the capability of a fixed-base structure to modify the motion of the surrounding soil during an earthquake or a release test, but there is very little information about this kind of soil-structure effects for base-isolated structures. During this experimental campaign the dynamic behaviour of two surrounding structures has been monitored before, during and after each test. The base-isolated structure has been characterized in terms of eigenfrequencies, equivalent viscous damping factor and mode shapes in ambient noise (considering the superstructure as a fixed-base structure) and during release tests (monitoring the dynamic behaviour of superstructure, base isolation system and underground floor).
Analysis of dynamic behaviour of a base isolated building: a release test in Augusta (SI), Italy.
PONZO, Felice Carlo;DITOMMASO, ROCCO;NIGRO, Domenico Salvatore;
2014-01-01
Abstract
On the 22th of May 2013, during several release tests, in order to acquire the dynamic response of a base-isolated structure, and their soil-structure interaction, several accelerometers have been installed within the structure and on the surrounding soil. The building is located in Augusta City (Italy) an earthquake-prone area. The dynamic behaviour of the structure, together with the soil, has been monitored and analysed. In fact, it is well know the capability of a fixed-base structure to modify the motion of the surrounding soil during an earthquake or a release test, but there is very little information about this kind of soil-structure effects for base-isolated structures. During this experimental campaign the dynamic behaviour of two surrounding structures has been monitored before, during and after each test. The base-isolated structure has been characterized in terms of eigenfrequencies, equivalent viscous damping factor and mode shapes in ambient noise (considering the superstructure as a fixed-base structure) and during release tests (monitoring the dynamic behaviour of superstructure, base isolation system and underground floor).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
