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Isoductile strengths and strength reduction factors of elasto‐plastic SDOF systems subjected to simple waveforms
Author(s) -
Cuesta Isabel,
Aschheim Mark A.
Publication year - 2001
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.51
Subject(s) - structural engineering , waveform , reduction (mathematics) , strength reduction , displacement (psychology) , acceleration , ductility (earth science) , simple (philosophy) , quadratic equation , constant (computer programming) , energy (signal processing) , mathematics , engineering , materials science , physics , computer science , classical mechanics , geometry , composite material , electrical engineering , philosophy , creep , voltage , psychotherapist , psychology , epistemology , programming language , finite element method , statistics
The inelastic response of elasto‐plastic SDOF oscillators subjected to 24 simple waveforms was studied. The waveforms contain linear, quadratic, sinusoidal, and triangular acceleration components that repeat for not more than several cycles. Similarities and differences in oscillator response characteristics are presented, organized by a characteristic period. The strengths and corresponding strength reduction factors required for constant ductility responses are discussed. Response data are compared with expectations based on the concepts of equal energy, equal displacement, and preservation of force. Limitations on the applicability of the equal energy concept are identified. Copyright © 2001 John Wiley & Sons, Ltd.

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