Journal
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
Volume 37, Issue 13, Pages 1511-1526Publisher
JOHN WILEY & SONS LTD
DOI: 10.1002/eqe.825
Keywords
high damping rubber; dissipating devices; seismic isolation; nonlinear behaviour; equivalent linear models
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High damping rubber (HDR) shows a quite complex constitutive behaviour, which is nonlinear with respect to strain and is dependent on the strain rate. In addition, it exhibits a transient response during which the material properties change (scragging or more generally the Mullins effect). A number of recent works were dedicated to analysing and modelling material behaviour. This paper studies the nonlinear dynamics of systems with restoring force produced by HDR-based devices in order to propose a procedure to define equivalent linear models considering both transient and stationary behaviours. The reliability of these linear models is tested by evaluating the upper and lower bounds of the seismic response of a structural system equipped with HDR-based devices (structural system with dissipative bracings and isolated systems). Copyright (C) 2008 John Wiley & Sons, Ltd.
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