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Recent content by Bill2001

  1. Bill2001

    Composite beam in STAAD

    Ed, Thanks for your helps! I don't know why we should model the structutre this way. Don't you think this is a limitation in STAAD? When you use Digital Canal Composite Beam, do you also get so large axial forces in the girders? BTW I see you are an advanced user of STAAD using REPEAT in your...
  2. Bill2001

    Composite beam in STAAD

    Ed, Thanks for your help. Could you please say why I have to change the support? Bill
  3. Bill2001

    Composite beam in STAAD

    edward1 Thanks for your help! I did the same to my model. All axial forces are gone now. Could you please take a look at my modified model see if you find any irregularities in my modified model. Please not that I used PERFORM ROTATION X 90 to rotate my original model, then I specified the...
  4. Bill2001

    Composite beam in STAAD

    edward1 Thanks for your reply and please fogive me if I am late in responding you. I am not sure if one can specify the member offset distance in conjunction with the beta command. Please see attached pictutre. LOCAL means that the distances f1, f2, f3 are in the same member coordinate system...
  5. Bill2001

    Composite beam in STAAD

    edward1, Thanks for your help indeed. I must try this software. Bill
  6. Bill2001

    Composite beam in STAAD

    Hi edward1, Thanks for your reply. I am glad to hear that you have successfully modeled a composite beam in STAAD. I was about to give it up and try other software for this problem. Have you applied MEMEBER OFFSET command to steel girders? I have done the same, but the max mid span moment is not...
  7. Bill2001

    Composite beam in STAAD

    Thanks again SteveGregory, Do you know how I can get rid of the axial force in the beam? I have used the EXPLICIT definition method in STAAD to create a composite beam (CM.std) The steel beam and concrete slab act monolithically and as expected for load case 1, max Mz=5000 kNm, but it doesn’t...
  8. Bill2001

    Composite beam in STAAD

    Thanks SteveGregory, I don't know how I can make a rigid floor diaphragm. Just wonder if you mind helping me on this? Again thanks a lot. Bill
  9. Bill2001

    Composite beam in STAAD

    Thanks for your reply. I did as you suggested. I still get axial force. What do you think? I have attached my modified model. Billhttp://files.engineering.com/getfile.aspx?folder=6e74ad62-57ad-4dd7-8022-c63e834e44b8&file=Composite_Master-Slave.std
  10. Bill2001

    Composite beam in STAAD

    Thanks for your hint, but what do you think about the section force computed by STAAD? I mean small bending moment and large axial force. Unfortunately, I don't have any other software to verify the results. Suppose this is a bridge deck, what shall we do if the section forces are not correct...
  11. Bill2001

    Composite beam in STAAD

    Hi, I am trying to model a composite beam (steel beam + concrete slab). For this purpose I modeled my composite beam as a steel beam and plate elements. I applied then an offset distance 0.95 m to the steel beams. Now I see that the steel beam gets a very large axial force and the Mz moment at...
  12. Bill2001

    Master-Slave Connection

    1) Slave directions at joints may not be supported directions or have displacements imposed. 2) Master and/or slave joints may not be inclined supports. Hope this helps you. Bill
  13. Bill2001

    Element Release - Plate Elements

    Hi friends, Just wonder if any of you has any experience applying "ELEMENT RELEASE" command to release one or more degrees of freedom at the corner nodes of the elements? Appreciate if you could upload a sample Kind regards Bill
  14. Bill2001

    Slab Design as per NS3473

    Hi, I am trying to perform a concrete design on plate elements as per NS3473 in STAAD.Pro V8i (Release 20.07.04.12). Can STAAD.Pro design plate elements (slab design) for membrane stresses such as Sx, Sy and Sxy when setting TRACK=20? What is your experience? I will be glad to have your...
  15. Bill2001

    Axis in STAAD.Pro & Section Wizard

    Hi, When importing user defined sections from Section Wizard, does STAAD.Pro use the same axis (Z & Y axis) system as Section Wizard or does STAAD.Pro instead use the V & U axis of Section Wizard? I need clarification on this because I am dealing with some unsymmetrical steel shapes where the...
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