Problem $3\mathrm{.}9$

Use Seismo$-$Signal or USEE to plot the acceleration, velocity and displacement response spectra for the $1999$ Kocaeli $($Turkey$)$ earthquake $($Station D$$cze$,$ horizontal component$).$ Consider an elastic system with $5\backslash \%$ viscous damping and an inelastic system with ductility of $4.$ For the latter system, assume two inelastic response models, namely linear elastic$-$perfectly plastic and linear elastic strain hardening. Use four values for the post$-$yield hardening of $\backslash (1\backslash \%,5\backslash \%,10\backslash \%\backslash )$ and $\backslash (20\backslash \%\backslash ).$ Comment on the results. For the inelastic spectra use a viscous damping of $\backslash (0\mathrm{.}5\backslash \%\backslash ).$