The hysteretic energy as a performance measure in analytical studies

Hysteretic energy dissipation is often employed as a measure of performance for systems subjected to earthquake excitation. This mainly stems from quasi-static cyclic tests where fuller hysteresis loops (i.e., higher energy absorption) are taken to indicate better performance when comparing systems...

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Bibliographic Details
Published in:Earthquake spectra 2018-05, Vol.34 (2), p.719-739
Main Authors: Kazantzi, Athanasia K, Vamvatsikos, Dimitrios
Format: Article
Language:English
Subjects:
acceleration
buildings
data bases
data processing
earthquakes
elastoplastic materials
energy
engineering geology
ground motion
loading
magnitude
numerical models
oscillations
seismic intensity
Seismology
spectra
spectral analysis
strong motion
vibration
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Summary:Hysteretic energy dissipation is often employed as a measure of performance for systems subjected to earthquake excitation. This mainly stems from quasi-static cyclic tests where fuller hysteresis loops (i.e., higher energy absorption) are taken to indicate better performance when comparing systems with similar strength under the same cyclic loading protocol. However, seismic loading offers a different proving ground, where energy absorption is strongly correlated with energy input, while the nonstationary loads imply that the beneficial hysteretic effects observed in a cyclic test may never be realized. Given the current state of art in models and methods of performance-based earthquake engineering, we ask whether earthquake records at a given seismic intensity will cause peak/residual displacements or accelerations that favor models having fuller hysteresis. Using incremental dynamic analysis on story-level oscillators with varying hysteretic characteristics, it is demonstrated that hysteretic energy dissipation does not consistently correlate with seismic performance.
ISSN:8755-2930
1944-8201
DOI:10.1193/112816EQS207M