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AN ANALYTICAL HYSTERESIS MODEL FOR ELASTOMERIC SEISMIC ISOLATION BEARINGS
Author(s) -
KIKUCHI MASARU,
AIKEN IAN D.
Publication year - 1997
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/(sici)1096-9845(199702)26:2<215::aid-eqe640>3.0.co;2-9
Subject(s) - bearing (navigation) , structural engineering , seismic isolation , elastomer , displacement (psychology) , hysteresis , base isolation , natural rubber , engineering , earthquake engineering , geotechnical engineering , geology , materials science , computer science , mechanical engineering , composite material , physics , quantum mechanics , frame (networking) , psychology , artificial intelligence , psychotherapist
For the purpose of accurately predicting the seismic response of base‐isolated structures, an analytical hysteresis model for elastomeric seismic isolation bearings is proposed. An extensive series of experimental tests of four types of seismic isolation bearings—two types of high‐damping rubber bearings, one type of lead‐rubber bearing and one type of silicon rubber bearing—was carried out with the objective of fully identifying their mechanical characteristics. The proposed model is capable of well‐predicting the mechanical properties of each type of elastomeric bearing into the large strain range. Earthquake simulator tests were also conducted after the loading tests of the individual bearings. In order to show the validity of the proposed model, non‐linear dynamic analyses were conducted to simulate the earthquake simulator test results. Good agreement between the experimental and analytical results shows that the model can be an effective numerical tool to predict not only the peak response value but also the force–displacement relationship of the isolators and floor response spectra for isolated structures. © 1997 by John Wiley & Sons, Ltd.