Seismosoft | Earthquake Engineering Solutions

Dear seismosoft support,

I have a single story single bay steel frame with infill panel, and I would like to add the current infill panel to a multistorey steel frame which is attached https://www.dropbox.com/s/h866pk5t3dos2 ... 1.spf?dl=0, and run the static time-history analysis.

For the struct curve and shear curve parameters, could I just copy them from the infill panel in current single story frame to multistorey?

I understand I should recalculate the strut area 1 in multistorey frame instead of using the strut area in single frame. However, I am not sure whether I should also recalculate the equival contact length hz, horiz. offset and vert. offset? For example, the current parameters for infill panel in single frame is:
Equival. contact: 25.4
Horiz. offset:0.3
Verti. offset: 0.3

If I recalculate these with the multistorey frame, it would change to:
Equival. contact: 16
Horiz. offset: 2.6
Verti. offset: 6.5

Which one should I use for multistorey? Thank you very much.

Dear zhwang,

Please consult the User Manual and Help System about the infill panels. The properties of the infill element do not depend on the number of storeys you have in your model. The infill's properties depend on the infill panel's properties and on the frame members' properties that surround it.

Dear Zoi,

Thank you very much for your kind reply. I have a careful reading on the User Manual and Help System in this part.

My current understanding is that the Strut Curve Parameters and Shear Curve Parameters are the properties of infill element themselves. If I change the size of the infill panel, these parameters still keep same.
However, some other parameters such as Strut Area 1, Equivalent contact length-hz, Horizontal and Vertical offsets depend on both the infill panel’s properties and the surrounding frame member’s properties. Thus, if I change the size of infill panel or the size of surrounding frame (including size of beams and columns of frame, and panel height), I should recalculate the Strut Area 1, Equivalent contact length-hz, Horizontal and Vertical offsets.

Could you please help me to check whether my understanding is correct?

Thank you very much.

Dear Zhwang,

Yes, you have understood it correctly.