Seismosoft | Earthquake Engineering Solutions

Thanks.
I adopt only one element type: infrmFB for all the beams and pillars.
If it is possible I can share the file to simplify the check.

I am running SeismoStruct v2023 Release-1 Build-120
In the "Edit Material Properties" I have the following parameters:
Modulus of elasticity (kPa) 2,1000E+008
Yield strength (kPa) 235000,00
Strain hardening parameter (-) 0,00
Fracture/buckling strain (-) 0,20
Specific Weigth (kN/m3) 76,70

The ...

Thanks for your reply.
The HEA280 section shows a resistance modulus Wel equal to 1013 cm^3 and a plastic one equal to 1112 cm^3. Taking into account a S235 steel (elastic-perfectly plastic behaviour) it follows that the elastic limit bending moment is equal to 238 kNm and ultimate (plastic) one is ...

I am new to SeismoStruct and I am solving a simple steel frame (two bays with different span, two floors, elastic pefectly plastic model with 235 MPa strength)
with one beam loaded by a distributed permanent element load and an acceleration time history applied to all the supports (all fixed).
My ...