Dear SeismoStruct,
I use the CCS(composite circle section) for the pile analysis, the shell of the pile is steel, I add the rebar inside. The reinforcement bars are defined by editing the reinforcement pattern. But why the output shows the strain and stress of the bars are zero?( I have selected stress/strain output in the 'Analysis Output' module) If I removed the bars, the results are the same as previous results, it means the bars didn't work with the concrete and steel cover in the CCS section.How can I solve my problem? Thank you very much.
No strain and stress of rebar
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Stelios_Antoniou
- Posts: 89
- Joined: 17 Jul 2011, 20:08
Re: No strain and stress of rebar
The stress/strain points are 'imaginary' areas that are used only for monitoring purposes, and do not really participate in the analysis, i.e. a stress-strain point at any location of the integration section does not necessarily mean the selected material appears in that particular location of the section.
Regarding the zero values that you got in the stress-strain output, please make sure that your model is actually loaded.
Regarding the zero values that you got in the stress-strain output, please make sure that your model is actually loaded.
Re: No strain and stress of rebar
Thank you for you reply. I used the pushover analysis. If I changed the section to RCCS, everything worked well in the same condition. So I am confused why the bar didn't work in the CCS section.
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Stelios_Antoniou
- Posts: 89
- Joined: 17 Jul 2011, 20:08
Re: No strain and stress of rebar
Can you please send me the problematic file, so that I have a look?
Thanks
Thanks
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seismosoft
- Posts: 1271
- Joined: 06 Jul 2007, 04:55
Re: No strain and stress of rebar
Dear Tracy,
For the benefit of other users, we include here the response already provided to you via email:
As noted by Stelios Antoniou, the max/min stresses and strains that can be found in the ‘Peak Stresses and Strains’ output module are different from the Stress Points values. The former are the max/min values of all ‘true’ integration points of the section, whilst the latter are selected ‘imaginary’ stress strain points that are defined by a user for monitoring purposes (and they can be found in the ‘Strains and Stresses in Selected Points’ output module).
Your model was giving max/min values of the S500 steel, since it has at least one rebar defined. If such rebar is removed, then the max/min values of S500 become zero (as in the screenshot that you sent), because there is no rebar defined, which is reasonable.
Regarding the Stress Points that you defined, they give always the same values, independently of the existence of a rebar or not, because they do not correspond to actual analysis integration points (i.e. they always output stresses and strains, as if there was a similar integration point at that location).
Seismosoft Support
For the benefit of other users, we include here the response already provided to you via email:
As noted by Stelios Antoniou, the max/min stresses and strains that can be found in the ‘Peak Stresses and Strains’ output module are different from the Stress Points values. The former are the max/min values of all ‘true’ integration points of the section, whilst the latter are selected ‘imaginary’ stress strain points that are defined by a user for monitoring purposes (and they can be found in the ‘Strains and Stresses in Selected Points’ output module).
Your model was giving max/min values of the S500 steel, since it has at least one rebar defined. If such rebar is removed, then the max/min values of S500 become zero (as in the screenshot that you sent), because there is no rebar defined, which is reasonable.
Regarding the Stress Points that you defined, they give always the same values, independently of the existence of a rebar or not, because they do not correspond to actual analysis integration points (i.e. they always output stresses and strains, as if there was a similar integration point at that location).
Seismosoft Support