Seismosoft | Earthquake Engineering Solutions

Hi, huffte.
I get it. Thank you for your reply and suggestion.

Dear seismosoft,
Thanks for your seismosignal software and I am using it with a question. Can you tell me the type of damping used in the Elastic spectrum and Constant-ductility inelastic spectra analyses? This is initial stiffness or tangent stiffness proportional Rayleigh damping?

Thanks ...