caa a22 4500 44584714X CHVBK 20180317145402.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s10518-011-9244-8 doi (NATIONALLICENCE)springer-10.1007/s10518-011-9244-8 Effects of air temperature on the cyclic behavior of elastomeric seismic isolators [Elektronische Daten] [Donatello Cardone, Giuseppe Gesualdi, Domenico Nigro] The mechanical properties of elastomers can change significantly due to air temperature variations. In particular, prolonged exposure to subzero temperatures can result in rubber crystallization, with a considerable increase in the shear stiffness of the material. As a result, the seismic response of structures with elastomeric isolators can be strongly influenced by air temperature. Current seismic codes, indeed, require an upper and lower bound analysis, using suitable modification factors, to account for the changes in the cyclic behavior of elastomeric isolators due to air temperature variations. In this study, the sensitivity of the cyclic behavior of elastomeric isolators to air temperature variations is investigated based on the experimental results of an extensive test program on six different elastomeric compounds for seismic isolators, characterized by a shear modulus ranging from 0.5 to 1.2MPa at 100% shear strain and 20°C. The cyclic tests have been performed on small-size specimens, subjected to shear strain amplitudes and frequency of loading typical for elastomeric seismic isolators, at seven different air temperatures, ranging from 40 to −20°C. The effects of rubber crystallization due to prolonged exposure to low-temperatures have been also investigated. A finite element model for the evaluation of the temperature contour map inside a full-size elastomeric isolator exposed to low air temperatures has been also developed. In the paper, the experimental outcomes are compared with the modification factors provided by the current seismic codes to account for the temperature effects on the mechanical properties of elastomeric isolators. Springer Science+Business Media B.V., 2011 Seismic isolation nationallicence High damping rubber bearings nationallicence Air temperature nationallicence Rubber crystallization nationallicence Upper and lower bound analysis nationallicence Experimental cyclic tests nationallicence Finite element thermal analysis nationallicence Cardone Donatello University of Basilicata, Potenza, Italy aut Gesualdi Giuseppe University of Basilicata, Potenza, Italy aut Nigro Domenico University of Basilicata, Potenza, Italy aut Bulletin of Earthquake Engineering Springer Netherlands 9/4(2011-08-01), 1227-1255 1570-761X 9:4<1227 2011 9 10518 https://doi.org/10.1007/s10518-011-9244-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10518-011-9244-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cardone Donatello University of Basilicata, Potenza, Italy aut NATIONALLICENCE 700 1- Gesualdi Giuseppe University of Basilicata, Potenza, Italy aut NATIONALLICENCE 700 1- Nigro Domenico University of Basilicata, Potenza, Italy aut NATIONALLICENCE 773 0- Bulletin of Earthquake Engineering Springer Netherlands 9/4(2011-08-01), 1227-1255 1570-761X 9:4<1227 2011 9 10518 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer