SDOF System
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ζ: Viscous damping ratio (%).
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αy: Base shear coefficient (Fy / (m·g)). Defines normalized strength.
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Hiso, Hkin:
Post-yield hardening (% elastic k).
Spectrum
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Calculated by varying the SDOF period between Tstart and Tend.
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Integration: Newmark-beta (β=1/4, γ=1/2).
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Material: Bilinear with combined hardening.
Spectrum Comparator (2025)
Leandro Morillas et al.
meih.ugr.es