SeismoStruct 2016 to 2020

04-Unexpected behaviour/errors
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Uruloki
Posts: 4
Joined: 10 Apr 2021, 14:39

SeismoStruct 2016 to 2020

Post by Uruloki »

Hi, i have frame model that analysis with seismostruct 2016 version but i need to add seismic isolators that model. 2016 version there is no options with bearing elements.

I tried the open model with 2020 version then run analysis but 2020 version give an error
Image

There is difference with hysteretic curves

Version 2016
Image

Version 2020
Image

How can i fix this problem?

Model files

Version 2016
https://drive.google.com/file/d/1cx7BuP ... sp=sharing

Version 2020
https://drive.google.com/file/d/12_i7km ... sp=sharing
Uruloki
Posts: 4
Joined: 10 Apr 2021, 14:39

Re: SeismoStruct 2016 to 2020

Post by Uruloki »

Sorry for the picture link

I tried the open model with 2020 version then run analysis but 2020 version give an error
Image

There is difference with hysteretic curves

Version 2016
Image

Version 2020
Image
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seismosoft
Posts: 1184
Joined: 06 Jul 2007, 04:55

Re: SeismoStruct 2016 to 2020

Post by seismosoft »

The differences are relatively small and they are probably attributed to a loose convergence criterion (see instabilities in the top of the curve in v2016). With more stringent criteria you will probably get very similar response.
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Uruloki
Posts: 4
Joined: 10 Apr 2021, 14:39

Re: SeismoStruct 2016 to 2020

Post by Uruloki »

Hi again, actually i want create hysteretic curve so add eartquake aceleration version 2016 and there ise 2016 hysteretic curve

Image

Image

And totaly same model on version 2020, only difference is convergence criteria

Image

convergence analysis detail

Image

Hystereric curve

Image

Am i missing something?
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seismosoft
Posts: 1184
Joined: 06 Jul 2007, 04:55

Re: SeismoStruct 2016 to 2020

Post by seismosoft »

The values of 0.10 for the convergence criteria are extremely loose. You should not set them larger than 1e-4. This is probably causing the disrepancies.
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Uruloki
Posts: 4
Joined: 10 Apr 2021, 14:39

Re: SeismoStruct 2016 to 2020

Post by Uruloki »

seismosoft wrote: 16 Apr 2021, 13:14 The values of 0.10 for the convergence criteria are extremely loose. You should not set them larger than 1e-4. This is probably causing the disrepancies.
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Still same

Image

Image

Image
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seismosoft
Posts: 1184
Joined: 06 Jul 2007, 04:55

Re: SeismoStruct 2016 to 2020

Post by seismosoft »

We cannot know what differences there are between your v2016 and v2020 models. However, we already checked the v2016 model that you sent us, we ran it with v2016 and v2020, and the differences between them were negligible, hence there must be some difference between the models.

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