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• W2044805936 startingPage "700" @default.
• W2044805936 abstract "The paper describes the behaviour of liquid storage slender and broad tanks isolated by the double variable frequency pendulum isolator (DVFPI). The DVFPI is a double sliding isolation system having elliptical sliding surfaces. The geometry and coefficient of friction of top and bottom sliding surfaces can be unequal. The governing equations of motion and energy balance equation of the tank-isolation system subjected to bilateral ground excitation are derived and solved in the incremental form. In order to investigate the behaviour of the DVFPI, the response is obtained under different parametric variations for a set of 20 far-field earthquake ground motions. Four different combinations of the DVFPI design cases having different isolator geometry and coefficient friction at top and bottom sliding surfaces are studied and the criterion to optimize its performance is proposed based on minimum responses and energy quantities. Further, influences of the initial time period, coefficient of friction and frequency variation factors at the two sliding surfaces and the tank aspect ratio are investigated. It is found that the performance of the DVFPI can be optimized by designing the top sliding surface with high initial stiffness relative to the bottom one and the coefficient of friction of both sliding surfaces to be equal for a slender tank whereas both surfaces should be designed with equal initial stiffness and coefficient of friction for a broad tank." @default.
• W2044805936 created "2016-06-24" @default.
• W2044805936 creator A5034498735 @default.
• W2044805936 creator A5043065487 @default.
• W2044805936 creator A5074710899 @default.
• W2044805936 date "2011-03-01" @default.
• W2044805936 modified "2023-10-18" @default.
• W2044805936 title "Double variable frequency pendulum isolator for seismic isolation of liquid storage tanks" @default.
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• W2044805936 doi "https://doi.org/10.1016/j.nucengdes.2011.01.012" @default.
• W2044805936 hasPublicationYear "2011" @default.
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