Experimental Tests And Analytical Model Of High Damping Rubber Dissipating Devices_Astaa & Ragnib_Elsevier 2006_11p.pdf

Engineering Structures 28 (2006) 1874–1884ate/engstructExperimental tests and analytical model of high dampingrubber dissipating devicesA. Dall’Astaa,?, L. RagnibaDipartimento di Progettazione e Costruzione dell’Ambiente, Universit`a di Camerino, Ascoli Piceno, ItalybDipartimento di Architettura Costruzioni e Strutture, Universit`a ica delle Marche, Ancona, ItalyReceived 14 November 2005; received in revised form 16 March 2006; accepted 17 March 2006Available online 22 May 2006AbstractHigh damping rubber (HDR) consists of natural rubber to which black carbon ?ller is added to increase its damping properties. The use of HDRas a dissipating device in structural systems is very promising in terms of controlling the response under live actions like wind or earthquake. Theuse of HDR does however entail some problems because its dynamic behaviour is pletely understood and the few HDR models that existare pletely satisfactory for seismic analysis of structures equipped with HDR-base dissipation devices. Experimental tests were performedto obtain more accurate information about the behaviour of the material under cyclic shear paths with different strain rate and strain amplitude. Anonlinear viscoelastic damage model was proposed to describe the behaviour of rubber under cyclic Elsevier Ltd. All rights :High damping rubber; Mullins effect; Experimental tests; Dynamic behaviour of damper devices; Rheological model1. IntroductionIn the last fewyears great interest has been generated in highdamping rubber (HDR) due to its increasing use in industry, forexample in vibration isolators, earthquake bearings, dissipatingdevices, but also because of its extensive use in vehicle consists of natural rubber to which black carbon ?ller isadded in order to improve a wide range of desirable materialproperties such as the strength and damping capacities. Theaddition of this ?ller however also has other effects, that arenot always desirable, such as the