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RE: STAAD Foundation

April 7, 2017, 2:49 pm
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Erika: The STAAD.Pro Advanced Analysis license does NOT include STAAD Foundation Advanced (SFA). To use SFA, you will need to have a separate license for the product. The current version of STAAD.Pro is 20.07.11.82 and that of SFA is 08.00.01.33. The News Feed in each of these programs announce when a new version is released. In the near future we are going to release a Connect Advisor application which would keep track of all updates for programs and notify users accordingly. Tank Foundation module is part of the SFA software itself and so no separate download is required other than downloading SFA.

Also just wanted to add that STAAD Foundation as a product has been replaced by STAAD Foundation Advanced (SFA).
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STAAD Foundation

April 7, 2017, 1:28 pm
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Hello, 

If you own a licence of the Advanced Analysis processor in STAAD Pro V8i, do you automatically have access to STAAD Foundation? If so, how do I make sure I am using the most current version of the program? Also, i would like to utilize tank foundation design in STAAD foundation....is that a module that I will need to download from somewhere or can i access it directly from STAAD Foundation? 

Thank you in advance. 

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RE: URGENT!!!! INSTABLE JOINTS

April 9, 2017, 11:48 pm
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URGENT!!!! INSTABLE JOINTS

April 9, 2017, 5:12 pm
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URGENT!!!

Please help me with this warning!

See attached staad file[View:/cfs-file/__key/communityserver-discussions-components-files/5932/6x6shelter17.std:940:0] 

***NOTE - VERY WEAK SPRING ADDED FOR STABILITY
 
    **NOTE** STAAD DETECTS INSTABILITIES AS EXCESSIVE LOSS OF SIGNIFICANT DIGITS
             DURING DECOMPOSITION. WHEN A DECOMPOSED DIAGONAL IS LESS THAN THE
             BUILT-IN REDUCTION FACTOR TIMES THE ORIGINAL STIFFNESS MATRIX DIAGONAL,
             STAAD PRINTS A SINGULARITY NOTICE. THE BUILT-IN REDUCTION FACTOR
             IS   1.000E-09
 
             THE ABOVE CONDITIONS COULD ALSO BE CAUSED BY VERY STIFF OR VERY WEAK
             ELEMENTS AS WELL AS TRUE SINGULARITIES.
 
 
 ***WARNING -  INSTABILITY AT JOINT    61   DIRECTION = MY
  PROBABLE CAUSE SINGULAR-ADDING WEAK SPRING
  K-MATRIX DIAG=  9.2110398E+19 L-MATRIX DIAG=  3.0714429E+09 EQN NO     155
  ***NOTE - VERY WEAK SPRING ADDED FOR STABILITY

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RE: STAAD Error on design of beam with cover plate

April 10, 2017, 12:04 am
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The design if I sections with cover plates was not available in STAAD.Pro build 20.07.11.33. Please upgrade to the latest STAAD.Pro version (20.07.11.82) where this design will be performed.
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RE: ***WARNING - INSTABILITY AT JOINT 234 DIRECTION = FZ

April 10, 2017, 12:11 am
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There are a lot of members in your model which are not intersecting, so this leads to instabilities. To fix that, select all the members in the model and go to Geometry -> Intersect Selected Members -> Intersect. Once this is done, go to Tools -> Check Duplicate -> Members and merge duplicate beams. This should take care of any warnings in your model.
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RE: STAAD Error on design of beam with cover plate

April 10, 2017, 12:29 am
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It seems your primary concern is failing of the member in code checking. I have checked with SS6 - Build Number 20.07.11.82 and it is failing there too with a ratio of 1.767. This is not an error in program, rather this is an information on the failure of a member in code checking.

If you go for a detailed design output by providing a TRACK 2 command in the list of design parameters, you will find that the member primarily failed in Major Axis Bending, and also in the associated interaction equations. So, you need to increase the Major Axis Bending Capacity of this beam.
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STAAD Error on design of beam with cover plate

April 9, 2017, 11:38 pm
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Hi,

I am getting error in designing beam with cover plate. 

[View:/cfs-file/__key/communityserver-discussions-components-files/5932/9m.std:940:0]

I am using (SS6 20.07.11.33). 

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RE: Envelope types

April 10, 2017, 2:18 am
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Envelope Type (like STRESS, STRENGTH, SERVICEABILITY etc.) are optional key words to specify qualitative nature of the load or load combination cases included in the envelop definition. Based on the nature of the load cases in the envelope, you can define appropriate design parameters for each envelope. You can refer Section 5.40 of the Technical Reference Manual of STAAD.Pro for more details.
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RE: Envelope types

April 10, 2017, 2:38 am
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Thanks for your reply

I've gone through the technical manual but I couldn't find any definition for the STRESS or STRENGTH envelopes.
The SERVICEABILITY and COLUMN envelopes are a little bit clear but I failed to understand the difference between the STRESS and STRENGTH envelopes.
I will appreciate it if you give me a clear explanation.
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RE: Buckling mode shapes

April 10, 2017, 3:42 am
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The mode shapes can be seen graphically only when the buckling analysis is performed using the Advanced Analysis Engine. The mode shapes can be found in the Postprocessing mode, Buckling vertical page.
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Buckling mode shapes

April 10, 2017, 2:28 am
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Hi,

After completion of  buckling analysis, how can I see graphically buckling mode shapes?

Regards,

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RE: Advanced cable analysis for cables with member offset command

April 10, 2017, 4:01 am
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Use of Member Offsets are not allowed for Cable members in STAAD.Pro.

For more details, please refer to the Notes mentioned under Section 1.18.2.8 - Advanced Non-Linear Cable Analysis, of Technical Reference Help Manual of STAAD.Pro.
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Advanced cable analysis for cables with member offset command

April 10, 2017, 1:31 am
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Hello Everyone,

I have a model where the cable is not extended to the centroid of the Beam (CHS). I have offsetted the cables by 680mm in the local longitudinal axis as per the following detail:-. However the results (displacement, bending moment, etc) are too Huge and not logical as the initial prestress is set to only 0.001kN.

In the initial model, I have not used the offset command on the cables and initial prestress was set to 350kN and the analysis results were convincing.

Do note that I have also tried used Tension member command (without prestress) for the cables With offset. Again, the results were convincing to me, which makes me wonder why the results with 0.001kN prestress can extremely excessive.

Please also note that the torsional moment of the CHS occurs in the anti-clockwise direction about it's longitudinal axis (Mx) and also about its major axis (Mz). When there is a torsional moment on the CHS, the offsetted cable should be able to prevent CHS rotation as the pivot point is at an eccentricity from the centroid. Whereas, if the cable is connected to the centroid, there is no local moment as the centroid does not rotate.

Please assist on this.

Thank you.

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RE: Envelope types

April 10, 2017, 4:11 am
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STRESS is mainly targeted for Load Envelope created for Allowable Stress based design and STRENGTH is mainly for Load Envelope created for Capacity based design. However, these names are tags only and optional.
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RE: Envelope types

April 10, 2017, 4:28 am
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Envelope types

April 9, 2017, 7:08 am
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Hi


Can any one tell me what is the difference between STRESS and STRENGTH envelope type?

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RE: ***WARNING - INSTABILITY AT JOINT 234 DIRECTION = FZ

April 10, 2017, 5:16 am
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Thank you that help me out alot.
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***WARNING - INSTABILITY AT JOINT 234 DIRECTION = FZ

April 9, 2017, 11:41 am
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Hello, 

I was wondering if any can help me with my STAAD model.

I have all the nodes and beams in, 

I have release the joints that need to be release. I am having troubles with 

instability at joints and I have tried everything to fix. Can some one please help me?

I have upload my STAAD please take a look. [View:/cfs-file/__key/communityserver-discussions-components-files/5932/working-progress-100-_2800_1_29002D00_nesw.std:940:0]

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RE: RAM Concept - Corrupted File

April 10, 2017, 7:32 am
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Once a file get's like this it can't be fixed. You can try restoring the backup files (.bak1 or .bak2), but depending how many times it was saved those may also be corrupt. We did correct the underlying issue and you should get version 6.02 to avoid it in the future. You can find out more about the error here:

I'm very sorry that you ran into this one.

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