Structural Instabilities and Zero Stiffness Problems in STAAD.Pro
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- เผยแพร่เมื่อ 18 มิ.ย. 2020
- The understanding of Zero Stiffness and Instabilities while doing the stiffness analysis of structures is a basic requirement to identify the modeling and mathematical instabilities that might exist in the structural model. Any disparities in this could have devastating effects on the structure. This STAAD.Pro CONNECT Edition webinar focuses on identification, understanding, and rectifying problems related to structural instability and zero stiffness problems.
In this session, you will learn:
- Introduction to Instability and Zero Stiffness problems in STAAD.Pro
- How to identify instability problems in a model
- Different types of instabilities present in the structure and how to rectify these problems
For more information on STAAD.Pro, please visit www.bentley.com/en/products/p...
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Very well explained. I was looking for these kinds of videos. Finally got it. Thanks a lot.
Please upload more videos similar to these warnings, explaining concept also & thank you very useful video
great explanation with concept 👍👍
When analyzing the truss discussed here using non linear analysis also giving partial moment release value of .9, the static checks are not satisfied for both force and as well as moment. How to rectify that?
I am trying to analyze a simple beam with pin support at both ends and a internal pin in between using non linear analysis but static check are failing. How to rectify that?
Excelente explicación, 👏🏻👏🏻 muchas gracias !
You all probably dont give a shit but does any of you know a tool to log back into an Instagram account?
I somehow forgot my account password. I would love any assistance you can give me
@Conrad Keith instablaster =)
@Dawson Graysen thanks for your reply. I found the site through google and I'm in the hacking process now.
I see it takes quite some time so I will get back to you later with my results.
@Dawson Graysen it did the trick and I finally got access to my account again. I am so happy!
Thank you so much, you saved my account !
@Conrad Keith You are welcome :)
Good Evening sir, as we are changing the percentage in moment release, how are these applied exactly on ground ? Like an example, you release a secondary beam of a RCC structure in staad but can you construct that kind of connection on ground ? Can you guide please. Thanks
Sir, in one of the structure which was being discussed at 34 min was with all pin supports and 44.5 min again with all pin supports but why the latter one was only failing due to pin supports ? And are these RCC or Steel structures ?? Should we have pin supports on one side and fixed on other side in a PEB ?
Simply "awesome"
Thanks Abhishek!
Mr. @@surojit_ghosh. Greetings. There are other problems that I am facing in staad connect fea. how can I connect with you?
A TRUSS FRAME ALL JOINT ARE WELD JOINT THAN IT REQUIRE TO MENTION MEMBER OF THIS FRAME "MEMBER TRUSS"? OR HOW % OF MOMENT RELEASE OR ALL MEMBER ARE FRAME MEMBER WITH OUT MOMENT RELEASE
IN STAAD ANALYSIS AND DESIGN
In my structure some warnings are like no member is loaded for the floor load generation.
But I found my all floor loads are assigned properly in load case details as well as reference load cases.
So why this type of warnings are there and how to rectify those warnings?
Please guide.
This warning indicates that for the applied floor load, there are few members present which are not subjected to any floor load component. You can isolate the floor load and use PRINT LOAD DATA command to investigate this issue. For more information, you can go through Bentley Communities site (communities.bentley.com/products/ram-staad/f/ram-staad-forum) where similar type of problems has been discussed.
A TRUSS FRAME ALL JOINT ARE WELD JOINT THAN IT REQUIRE TO MENTION MEMBER OF THIS FRAME "MEMBER TRUSS"? OR HOW % OF MOMENT RELEASE OR ALL MEMBER ARE FRAME MEMBER WITH OUT MOMENT RELEASE
IN STAAD ANALYSIS AND DESIGN
Static Check Results do not show the results for load combination, it shows the primary loads only. Can you advise ?
Static check results are reported only for those load cases which are analyzed. Load combinations are just the algebraic sum of results and hence it is not reported under statics check results. If you want, you can convert the load combination cases to repeat load cases - then under static check results, those loads will be reported.
Very well explained, can you send me the examples to try it ?
Please advise the 3 models you presented, where I can find in STAAD Pro ?
is this warning will appear ? if we do not apply any lateral load Fz.
Warnings will be reported if there is any instability condition present in the model and reporting does not depend on whether there is any load in that direction or not. On basis of the load application, you need to decide whether the warning is harmless or you need to rectify the structure.
thanks for all information. i want know design manholes of sewerage & rain network
Thank you for reaching out. Are you looking for a product to perform the structural design of the manhole cover or are you looking to sizing for water flow?
This problems makes StaadPro very difficult to use and especially when models become more complex.