Seismic Design and Evaluation of Moment Resisting Frames Using Elastomeric Dampers

Abstract eng:
Passive energy dissipation mechanisms have the ability to enhance the dynamic performance of structures by reducing interstorey drifts and the inelastic deformation of the primary structural elements. The aim of the project of which this work forms a part is the experimental and analytical evaluation of elastomeric dampers (EDs) as passive energy dissipation devices. Elastomeric dampers consist of a rubbery material bonded between two steel plates; they have similar characteristics to viscoelastic dampers, but are less sensitive to frequency and temperature, a fact which make them more effective. This paper describes analytical and experimental research aimed at fully capturing the behaviour of a proprietary damper, developed by TARRC (the Tun Abdul Razak Research Centre, UK) and generating a numerical model of the damper for use in analysis and design. A modified Generalised Maxwell Model is shown to give an excellent fit to experimental test data. In addition, preliminary structural analyses using a simplified damper model show the potential benefits of elastomeric dampers on seismic performance.

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