Error in code-based NTC 2018 and Eurocode 8 spectrum

03-Unexpected behaviour/errors
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MCortesc
Posts: 3
Joined: 29 Jun 2020, 15:38

Error in code-based NTC 2018 and Eurocode 8 spectrum

Post by MCortesc »

Good Morning,

For SeismoArtif 2020, I found an error when I try to create a design/inelastic spectrum using NTC18 Italian Code and EuroCode 8, Part 3. When I want to assign a behaviour factor (q), this value scales the all spectrum including the PGA (i.e. Sa (g) when the period is zero) which is conceptually wrong. To solve this I have to create by myself the spectrum using other routines and I cannot take advantage of the code-based spectrum tool you have, unless I use the elastic spectrum only.

I would appreciate if you solve this relevant issue.

Thank you in advance.
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seismosoft
Posts: 860
Joined: 06 Jul 2007, 04:55

Re: Error in code-based NTC 2018 and Eurocode 8 spectrum

Post by seismosoft »

Indeed there is a bug in the expressions of the design spectrum of NTC-18.
We will have ti fixed in the next release of the programs.
Thank you for spotting it
Seismosoft Support
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