Seismic Isolation Systems for Buildings Subjected to Vrancea Earthquakes
Tomme: LIX (LXIII) Fascicle: 3 | 2013
Pages: 91-102
Abstract text:
The efficiency of the base isolation method was demonstrated by the major earthquakes of the late twentieth century and early twenty-first century. However, in Romania, the first seismic isolated building was finished in 2010; thus, no data are available concerning the behaviour of those buildings to Vrancea earthquakes. The paper presents a comparative study between two seismic isolation systems. The first system is composed of lead rubber bearings and nonlinear fluid viscous dampers and the second system is composed of low-damping rubber bearings and friction dampers. The study shows that the minimum displacements and minimum base shear forces are obtained with the isolation system composed of low-damping rubber bearings and friction dampers. With the isolation system composed of lead rubber bearings and nonlinear fluid viscous dampers are recorded the minimum accelerations, both at the level of the isolation plane and at each level of the building.
Key Words:
friction damper; low-damping rubber bearing; nonlinear fluid viscous damper; nonlinear time-history analysis
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