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Floor response spectra for base‐isolated multi‐storey structures
Author(s) -
Fan FaGung,
Ahmadi Goodarz
Publication year - 1990
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.4290190307
Subject(s) - base isolation , structural engineering , base (topology) , natural rubber , spectral line , bearing (navigation) , engineering , acceleration , seismic isolation , peak ground acceleration , geotechnical engineering , isolation (microbiology) , geology , ground motion , materials science , computer science , physics , mechanical engineering , mathematics , composite material , mathematical analysis , microbiology and biotechnology , classical mechanics , frame (networking) , astronomy , artificial intelligence , biology
Abstract A study of floor response spectra for a base‐isolated multi‐storey structure under sinusoidal and seismic ground excitations is carried out. Several base isolation systems including the laminated rubber bearing, the pure‐friction, the resilient‐friction, the Électricité de France and the sliding resilient‐friction systems are considered. A sinusoidal ground acceleration and several earthquake accelerograms (including those of El Centro 1940, Pacoima Dam 1971 and Mexico City 1985) are used to evaluate the floor response spectra. The characteristics of the spectra generated by different base isolation systems are studied, and the results are compared with those for the fixed‐base structure. It is shown that the structural contents can be protected against earthquakes by the use of properly designed base isolation systems. In particular, the laminated rubber bearing system appears to be remarkably effective in protecting the secondary systems under a variety of conditions.