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  • Users: OJM
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  1. OJM

    Euro code - LTB checks & 2 bay portal frame

    Hi all, I’ve got two questions. Firstly when designing a beam for lateral torsional buckling I always thought you assume it buckled about its weakest axis (I.e. use Izz) even if it is loaded parallel to its strongest axis (the MCr equation uses Iz) Is this the case? As in the blue book the main...
  2. OJM

    plasticity/creep/connector friction algorithm warning

    Hi all, I'm modelling a steel beam and and concrete composite floor (trying to find the load deflection curves). Now that I have specified the concrete and steel inelastic strains into the material, I get this error? Anybody know what it is? I've had a look online and i tried turning NLgeom on...
  3. OJM

    Meshing my beam

    I have solved the 2nd error, now only the meshing error needs addressing, I've verified the mesh and there are only warnings but no errors. Seems strange why it won't run. I've tried to partition the concrete so that it's all green but i can't manage to, i think the shape is too complicated - I...
  4. OJM

    Meshing my beam

    Please find the jnl file attachedhttps://files.engineering.com/getfile.aspx?folder=9da8a2d2-0f82-43c2-8777-c1a97e932921&file=HUO_B_model.jnl
  5. OJM

    Meshing my beam

    only*
  6. OJM

    Meshing my beam

    don't think I can attach a inp file one cae or jnl
  7. OJM

    Meshing my beam

    I clicked the top option and managed to get a mesh that kind of worked. However when I run the model I get two errors, these are shown in the 2nd picture below. I think the first one is about the mesh (Volume of 18 elemnts is zero small or negative) Should I make sure all the partitions of each...
  8. OJM

    Meshing my beam

    Thanks I have now managed to partition the slab into green and yellow parts. However when I go to mesh it, i'm getting this error, what should I do?
  9. OJM

    Meshing my beam

    Thanks, I've now managed to get yellow and green for my beam I deleted the partitioning around the holes and it seems to look better?? I'm still struggling to get the same for the concrete slab part of the design, as you can see the slab is awkward shape, this is because its cast against the...
  10. OJM

    Meshing my beam

    Hi all, Currently trying to mesh my A-symmetric beam properly using C3D8R elements, I know that i'm supposed to add partitions to improve the mesh so I've partitioned the holes in the beam. Is this how it is supposed to look like? shouldn't all of the beam be either pink or green? Thanks
  11. OJM

    Reached the limit for the number of nodes.

    I have blocked all the different parts in XYZ directions and increase the reduced the increment in my amplitude table of loads and still give the same errors. Any idea?
  12. OJM

    Reached the limit for the number of nodes.

    Yes embedded region was used for the rebar, I constrained the ends of the rebar in two directions (not 3) should this be enough? I'll look into doing eigenfrequency extraction analysis is this hard? Thanks
  13. OJM

    Reached the limit for the number of nodes.

    Sorry about the small images
  14. OJM

    Reached the limit for the number of nodes.

    So I cut the beam in half and applied a symmetric boundary condition, good news it works! (under 250,000 nodes). I have got a lot of errors, I think my beam mesh is wrong, I have used Hex elements and meshed the whole thing without partitions as partitioning would be hard with all the holes...
  15. OJM

    Reached the limit for the number of nodes.

    Hi all, I have a question, how can I reduce the number of nodes that I have for my model. It's quite a large beam (7.2m long with a 1m wide slab) and it says I have exceeded the 250,000 node limit and can't run it. Someone mentioned that I may be able to mirror it and thus cutting out half...
  16. OJM

    How to model 4 point bending test with Loading cycles

    Hi all, I am wanting to simulate a structural four point bending test on Abaqus of a slim floor composite section, I've assigned a amplitude table with all the loads at different times, however when I assign a load to the two loading plates at mid-span It won't let me just pick the amplitude...
  17. OJM

    Job keeps getting aborted?

    I fixed the rebar on the ends and it hard finally worked!!! Thank you for your help! very much appreciated
  18. OJM

    Job keeps getting aborted?

    I have tried to make a fresh model and this is what happens
  19. OJM

    Job keeps getting aborted?

    3 of the 4 sides of my slab have boundary conditions (one of which is ENCASTRE i.e. fixed in all directions), and the other is left as a free end, so you're saying this needs a boundary condition also? or are you talking about the rebar (beams)? I have not set and boundary conditions for the...
  20. OJM

    Job keeps getting aborted?

    Thanks for your reply, it is greatly appreciated. I have gone through your points, I have separated the layer of rebar from each other, and still have the same problem. Not quite sure what you mean but connect beam parts at a node, because they shouldn't meet (because they are spaced equally...

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