Seismic Isolation: Available Devices, Recent Applications and Conditions for their Correct Use

摘要

Modern anti-seismic technologies, namely base isolation and energy dissipation,rnhave gained great popularity in the last decade as effective measures for seismicrnprotection of structures. Base isolation in particular is currently an active andrnexpanding subject area supported by performance-based earthquake engineeringrnmethods and the development of new materials and techniques. The paper, based onrnthe most recent authors’ experience and on the data provided by other members ofrnthe Anti-Seismic Systems International Society (ASSISi), gives an overview of thernworldwide applications and of the behaviour of seismically isolated buildings duringrnrecent earthquakes, including some preliminary data on the effects of the 2011rnChristchurch and Tohoku events. Particular attention is paid to the isolated buildingsrnin Italy, in the context of the effects of recent quakes. Based on the Italianrnexperience, some important conditions for the correct use of anti-seismic systemsrnare reported.