non-linear seismic response of low-rise liquid storage tank isolated by lead-rubber bearings

Earthquakes have generated serious damages to a great number of industrial equipments, especially liquid storage tanks that are tremendously important regarding to economic and environmental consequences. therefore, it is highly demandingto utilize methods for decreasing the seismic vulnerability of such structures. base isolation as a seismic protective device is already recognized and its evolution continues to spread. this study focuses on the seismic assessment of steel storage tanksisolated by lead-rubber bearings (lrb) which modeled in sap2000 v20.0. base isolation has appeared as one of the most powerful and valuable high-tech systems for keeping safe infrastructure under real ground motions. the effect of isolation onboth the impulsive and the convective (sloshing) responses of the liquid storage is investigated for steel tanks storage, which is presented that base isolation can decrease remarkably the hydrodynamic forces, overturning moments and axial compressivestresses in the storage tank without considerably intensifying the horizontal displacements of the liquid surface expected to the convective motion.