Seismosoft | Earthquake Engineering Solutions

Thank you for your prompt reply. Your suggestion does help me a lot.

<t>hi<br/>
i want to calculate a constant-ductility inelastic spectra with a negative post-yield stiffness ratio. <br/>
<br/>
i use the seismosignal , it seems it can only deal with the postive post-yield stiffness ratio. <br/>
<br/>
is there any solution to do a constant-ductility inelastic spectra ...

Thank you very much. I see it now. It is really a nice option.

does the seismostruct apply the gravity load automatically after the masses are defined? or should i define the gravity load in "apply loads" using the "permanent load" option??

thank you