Earthquake Energy Partitioning in Base Isolated and Dynamically Damped Structures

by Hirokazu Iemura, Kyoto Univ, Japan,

Document Type: Proceeding Paper

Part of: Structural Safety and Reliability


New earthquake energy spectra are proposed for practical design procedures using energy concepts. The spectra show integrated earthquake input energy of a unit mass with given natural period and damping ratio. The total input energy and its partitioning in complex structures are evaluated with an example application of modal analysis and the proposed spectra. Numerical simulations are carried out for inelastic structures to show the earthquake energy partitioning in time and in space. Inelastic earthquake response and earthquake partitioning of structures with base isolators or with tuned mass dampers subjected to earthquake ground motions is evaluated to verify their engineering significance.

Subject Headings: Base isolation | Earthquakes | Damping | Dynamic structural analysis | Inelasticity | Equations of motion | Structural response | Power spectral density

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