Seismosoft | Earthquake Engineering Solutions

Could you please explain HC, HBD,HBE and HS in the Multi_linear curve of the seismistruct?
In the manual, there are only three examples about this curve, but I want to know the definition of each parameter exactly to find and estimation them for my model. For example, I don't know what is "slip parameter HS". Is it bond slip in milimeter?
Thanks for your forum

All the details of the model are described in the following report:
Sivaselvan M., Reinhorn A.M. [1999] "Hysteretic models for cyclic behavior of deteriorating inelastic structures," Report MCEER-99-0018, MCEER/SUNY/Buffalo.
You can download it from:
http://mceer.buffalo.edu/publications/c ... -0018.html

Also have a look at:
http://mceer.buffalo.edu/pdf/report/09-0006.pdf
Regards,
Seismosoft Support