Non-linear modeling of seismic isolation systems made of recycled tire-rubber |
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| Institution: | 1. Civil Engineer, Spoerer Ingenieros Asociados SpA, Marchant Pereira 367, Of.701, Santiago, Chile;2. Professor, Pontificia Universidad Católica de Chile, National Research Center for Integrated Natural Desaster Management CONICYT/FONDAP/15110017, Av. Vicuña Mackenna 4860, Santiago, Chile;3. Professor of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, US;1. Department of Civil Engineering & Construction Engineering Management, California State University Long Beach, Long Beach, CA, USA;2. Department of Structures for Engineering and Architecture, University of Naples Federico II, Naples, Italy;3. Department of Industrial Engineering, University of Naples Federico II, Naples, Italy;1. Department of Civil Engineering, The University of Hong Kong, Haking Wong Building, Pokfulam Road, Hong Kong;2. School of Civil and Environmental Engineering, University of New South Wales, Sydney NSW 2052, Australia;1. School of Civil, Mining & Environmental Engineering, University of Wollongong, NSW 2522, Australia;2. Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, VIC, Australia;1. College of Civil Engineering, Fuzhou Univ., Fuzhou, 350108, China;2. Fujian Provincial Key Laboratory on Multi-disasters Prevention and Mitigation in Civil Engineering, Fuzhou Univ., Fuzhou, 350108, China;3. Civil, Construction-Architecture and Environmental Engineering Department, Università degli Studi dell’Aquila, L''Aquila, 67100, Italy |
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| Abstract: | This article considers the effectiveness of a seismic isolation system composed of a shallow layer of soil mixed with sand and rubber from shredded tires. A thorough review of past work is first provided, which is then followed by an evaluation of the constitutive properties of sand-rubber soil mixtures when these undergo large states of deformation and slip. Finally, a comprehensive set of simulations that involve a structure underlain by a strongly non-linear, seismic isolating layer when subjected to a variety of actual earthquakes scaled to various peak accelerations, are considered in detail. It is shown that the concept of using soil-rubber mixtures for the purposes of seismic isolation appears promising. A thickness for the rubber–soil mixture of just 2–3 m is likely to be enough to achieve good levels of reductions in the seismic response of the structure. This suggests the desirability of following these analyses with large-scale experimental verifications, not only to fully validate the concept, but also to quantify and assess the numerical predictions with our simple even if non-linear mechanical models, and verify the large-strain constitutive properties of the soil mixtures inferred from laboratory analyses. |
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| Keywords: | Geotechnical seismic isolation Rubber-soil mixture Recycled tire-rubber |
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