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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: A Simplified Model for the Elastic Dynamic Behavior of Base Isolated Buildings
Author(s): Julio S. Miranda
Publication: Special Publication
Appears on pages(s): 337-352
Keywords: bearings; building codes; dynamic tests; structural design; earthquake-resistant structures; plastics, polymers, and resins; Structural Research
Abstract:Describes a mathematical model for the seismic elastic response of base isolated buildings as a function of the superstructure dynamic properties when this is assumed fixed at the base, and of the same superstructure when this is assumed to behave as a rigid body with a single degree of freedom when mounted on base isolators. The expressions derived in this paper provide the period and damping of the isolated building, the magnitude of the seismic story forces, the base shear, and the base displacement. The expressions are simple and can be readily cast into building code format. The derived expressions are compared to the 1994 Uniform Building Code (UBC); a case study suggests improvement of currently recommended procedures by the UBC is feasible.
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