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  1. ThomasH

    Use of AI for learning and practicing structural design

    I have both "used" ChatGPT and more like "played" with it. The use has mostly been translations. For that that it is very good, but it usually requires that you know both languages. ChatGPT can be very helpful choosing the exact wording but you need to check the end result. But it does speed up...
  2. ThomasH

    Can we PLEASE go back to the old forum!

    I think that the forum is slowly becoming better. "My Forums" is back but I got the feeling that my list of forums had grown :). My mistake was that I decided to "Unwatch" everything and start over. And for each individual forum I add I have to make individual settings, that is a lot of mouse...
  3. ThomasH

    MSC NASTRAN for ABAQUS CAE

    One possibility may be to import the model into a pre-processor that works with both Abaqus and MSC.Nastran. But I think that will require a lot of testing to insure everything ultimately works as you intend it to work.
  4. ThomasH

    Can we PLEASE go back to the old forum!

    My first experience from the "new" forum was a lot of e-mails. Perhaps it is not the best default setting to activate everything. There was (and perhaps still is) a recommendation to not use e-mail any address in a post. The purpose is to avoid spam, perhaps someting to keep in mind regarding...
  5. ThomasH

    Srand7: Global Stiffness Matrix is Singular - Frame with Semi-rigid connections

    I am also unfamiliar with the software, but I saw something in IDS post. Exponent 50, if that means numbers with 50 zeros you may have have numerical issues.
  6. ThomasH

    AISC VS rigorous buckling analysis

    The terminology may differ a bit depending on the software. I work with all-purpose FEM-software and "Linear Elastic Buckling" is an eigenvalue problem. If you take "Euler buckling" it is the same thing. So, you can test the accuracy of the solver by modelling the basic Euler cases for members...
  7. ThomasH

    Some scientists have an idea to bui

    You mention "Some scientists", do you have a reference for this idea?
  8. ThomasH

    Metal Buildings - Independent Analysis

    I would use a software that allows me to model the beams with plate elements. Then the tapered beams can be modelled correct and stiffeners and other "plates" can be included.
  9. ThomasH

    AISC VS rigorous buckling analysis

    There is more in Eurocode then just shell stability. But regardless of it you use Eurocode or AISC, the purpose of the models (or equations) is to predict the strength (or stability) of a beam/column/structure. And the structure doesn't know what code you use [smile]. FEM. if it is set up...
  10. ThomasH

    AISC VS rigorous buckling analysis

    I am not in detail familiar with AISC. But in my experience FEM is often used to calculate a critical buckling stress. Then you can use models in the code to get allowable stresses. The key is to use the correct imperfections and I usually base them on buckling modes. That means that you...
  11. ThomasH

    AISC VS rigorous buckling analysis

    I don't know what you are after here but to use a buckling factor from a linear buckling analysis won't work. As you say yourself, there is no strength involved in that analysis. What you can do is to use it to determine a "critical stress" for a plate or a "buckling length" for a member and...
  12. ThomasH

    Increase in plastic strains after unloading

    If I speculate a bit, could be completely wrong [smile]. When the load is applied you have a total strain that consists of an elastic part and a plastic part. When you unload the elastic part should disappear but could not that change result in an increased plastic strain at another location. I...
  13. ThomasH

    Baltimore Bridge collapse after ship collision

    I agree. I think the interesting part now will be how this plays out in the courts. There is a lot of money involved.
  14. ThomasH

    Baltimore Bridge collapse after ship collision

    I have followed the tread since the beginning but not read everything in detail. But I have one question. Early in this there were some statements regarding this being intentional. I am not interested in different conspiracy theories, but has there been any reliable information regarding this...
  15. ThomasH

    Tank Ice Pressure Calculation

    I was involved in a project with water frezing a few years ago. A number I remember is that when water is confined and starts to expand (freeze) there is a pressure of more than 1000 MPa. Or, you create room for the expansion [smile].
  16. ThomasH

    chemical plant vs refinery vs water/waste water treatment plant

    The refineries I have worked with are often quite different from Waste water treatment plants. Some equipment are the same but the process is different. But what is it that you are changing in your work? Is it the technical part that you now want to work with a chemical plant? Or, is it the role...
  17. ThomasH

    chemical plant vs refinery vs water/waste water treatment plant

    This may be wrong but I assume that you are describing your own experience [smile]. What, in your experience, was the difference between the refinery and the water/waste water plant? What I am after is what you consider to be a difference? And, why are you so interested in these specific areas...
  18. ThomasH

    chemical plant vs refinery vs water/waste water treatment plant

    I have been involved in all three and I don't think you can just say that one is more challenging than the other. They are different, that's all. But if you compare them to other types structures there are things that makes them different. There are usually more dynamic loads than in a...
  19. ThomasH

    Technical drawing reviewing too time consuming?

    I think that AI may in the future be able to assist with things like that. One challenge will probably be how to describe the task to a computer. I think that is the main thing with AI. To be able to communicate with a computer as you do with a human. That is also what the Turing test is about...

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