"Double I type 2 section – di2" causes error in static pushover analysis

[pcandeias]

Dear all,

when modelling a URM building with some "Double I type 2 section – di2" steel profiles, the following error is generated when trying to run a static pushover analysis in SeismoStruct 2023 Release-2 Build-25:

"""
Errors detected while sending data to solver:

Analysis 1
Errors detected in Classes Module:

Definition of elastic frame element classes: The element parameters should be larger or equal to zero. SeismoStruct cannot run the analysis.
"""

The underlying material type is a Menegotto-Pinto steel model. I was able to narrow down the error to the use of the di2 sections. If I replace them with "Double I type 1 section – di1" with exactly the same dimensions and zero "Flange to Flange distance" the above error does not occur.

Best regards,
Paulo

[z.gronti]

Dear pcandeias,

I tried to reproduce the error you mentioned without c=success. Please check the values assign in the material types and in the section.
If you get this error after checking the above mentioned, please send me your file at z.gronti@seismosoft.com to check it.