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by seismosoft
18 Jan 2020, 08:42
Forum: 05-Future developments & requests
Topic: nonlinear analysis of slab
Replies: 1
Views: 16

Re: nonlinear analysis of slab

Unfortunately, SeismoStruct 2020 does not feature a nonlinear slab element. What you could do is to use the beam section types (rcars or rcts sections) with a small depth to simulate the slab.
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by seismosoft
14 Jan 2020, 16:39
Forum: 04-Unexpected behaviour/errors
Topic: Very different results when modeling with different element classes.
Replies: 12
Views: 97

Re: Very different results when modeling with different element classes.

No, the localisation issues are related to all fibre models.
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by seismosoft
13 Jan 2020, 17:22
Forum: 03-Analytical/modelling capabilities
Topic: elm_Inv
Replies: 1
Views: 19

Re: elm_Inv

There are several posts in the forum regarding the convergence issues and how to solver them. Note that there is also a section in the program manual on what to do when one comes across specific divergence messages.
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by seismosoft
13 Jan 2020, 17:17
Forum: 04-Unexpected behaviour/errors
Topic: Very different results when modeling with different element classes.
Replies: 12
Views: 97

Re: Very different results when modeling with different element classes.

There are several publications on the localisation issues in fibre modelling.
Please refer to these papers.
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by seismosoft
12 Jan 2020, 14:37
Forum: 04-Unexpected behaviour/errors
Topic: Very different results when modeling with different element classes.
Replies: 12
Views: 97

Re: Very different results when modeling with different element classes.

The results are by no means 'very different'. The response of the two models is similar, within acceptable limits, e.g. the difference in the yield strength of the models is approximately 6%. The main difference in the models is the fact that in the infrmFB model that 10% strain level (where fractur...
by seismosoft
11 Jan 2020, 16:48
Forum: 04-Unexpected behaviour/errors
Topic: Very different results when modeling with different element classes.
Replies: 12
Views: 97

Re: Very different results when modeling with different element classes.

This is strange. Can you please send the two files to support@seismosoft.com, so that we check the models?
Thanks.
by seismosoft
11 Jan 2020, 10:41
Forum: 02-Getting started with the modelling
Topic: RC beam-column joint
Replies: 10
Views: 4958

Re: RC beam-column joint

If you model the joint with a link element, the energy dissipated is the area below the force-deformation curve. You may find several beam-column joint examples in the SeismoStruct verification report. Note that the corresponding SeismoStruct files are available from the program menu. Seismosoft Sup...
by seismosoft
11 Jan 2020, 10:39
Forum: 04-Unexpected behaviour/errors
Topic: Very different results when modeling with different element classes.
Replies: 12
Views: 97

Re: Very different results when modeling with different element classes.

This is not reasonable. Are you sure that all the other parameters are the same? How many integration sections are you using with the infrmFB element type? Can you change the element type using the default parameters in each case and see if you get the similar results?
Seismosoft Support
by seismosoft
10 Jan 2020, 10:33
Forum: 03-Analytical/modelling capabilities
Topic: Damping energy
Replies: 3
Views: 117

Re: Damping energy

Hello Michal,
Although I am not an expert on the field, I am not aware of any indirect method to calculate the energy dissipated only due to Rayleigh damping.
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by seismosoft
10 Jan 2020, 10:30
Forum: 04-Unexpected behaviour/errors
Topic: Very different results when modeling with different element classes.
Replies: 12
Views: 97

Re: Very different results when modeling with different element classes.

Note that for the default infrmFB and infrmFBPH parameters, the results should not be very different. However, if you make significant changes to the plastic hinge length, the differences are expected to be high, as huffte very correctly pointed out.
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