Aim of the paper is the definition of optimal design parameters characterizing the isolation system of a bridge, both in the case of elastomeric (VI) and sliding bearings (SI), having viscoelastic or rigid-plastic behavior, respectively, installed between the piers and the deck. The problem is treated by means of an analytical approach. Using the frequency response analysis, a simple procedure is proposed to determine the optimal value of the viscous coefficient or the yield displacement of the isolators. The adequacy of the proposed procedure is finally verified through time-history analyses performed on a practical case under natural earthquakes.
Optimal design of the seismic protection system for isolated bridges / Losanno, Daniele; Spizzuoco, Mariacristina; Serino, Giorgio. - In: EARTHQUAKES AND STRUCTURES. - ISSN 2092-7614. - 7:6(2014), pp. 969-999. [10.12989/eas.2014.7.6.969]
Optimal design of the seismic protection system for isolated bridges
LOSANNO, DANIELE;SPIZZUOCO, MARIACRISTINA;SERINO, GIORGIO
2014
Abstract
Aim of the paper is the definition of optimal design parameters characterizing the isolation system of a bridge, both in the case of elastomeric (VI) and sliding bearings (SI), having viscoelastic or rigid-plastic behavior, respectively, installed between the piers and the deck. The problem is treated by means of an analytical approach. Using the frequency response analysis, a simple procedure is proposed to determine the optimal value of the viscous coefficient or the yield displacement of the isolators. The adequacy of the proposed procedure is finally verified through time-history analyses performed on a practical case under natural earthquakes.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
