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  1. Rahul Leslie

    OpenSTAAD

    In a nutshel, I wonder whether the function... openSTAADObj.Geometry.GetNodeList ...is working fine, in anybody's experience. In my case, with the VBA code given in above post, it is giving error, saying: Run-time error '5' Invalid procedure call or argument where could I be wrong? Rahul Leslie
  2. Rahul Leslie

    OpenSTAAD

    Hi, I have been trying to extract model details via OpenSTAAD, but it is showing error right from the start (Error 438)... The code is as below Private Sub CommandButton1_Click() Dim openSTAADObj As Object Set openSTAADObj = GetObject(, "StaadPro.OpenSTAAD")...
  3. Rahul Leslie

    Generating seismic loads methods

    Hi.. I suppose the following article too might help you in getting some basic idea of Equivalent Lateral Force Analysis, Modal Response Spectrum Analysis, Time History Analysis; and each’s corresponding Non-linear counterpart...
  4. Rahul Leslie

    Modeling issues in SAP2000

    @Usman3301, could you upload the ".S2K" file of the model you have modeled in SAP2000? ("file > export > .S2K file", I suppose)
  5. Rahul Leslie

    imposing a displacement profile on a structure

    Got it... you inserted a node in a beam that was passing through the diaphragm centre, inserted at that location (as seen in the pic)... it then automatically got added to the diaphragm. On this node, you applied a support... and then assigned a support displacement as a load... [thumbsup2]
  6. Rahul Leslie

    imposing a displacement profile on a structure

    With diaphragms, a node automatically appears at it's centre, and one can't himself put the node there to the diaphragm ... That node is usually no selectable, and so one can't (i suppose) assign a restraint to it. How did you manage to do it !!??
  7. Rahul Leslie

    imposing a displacement profile on a structure

    Are you doing pushover?
  8. Rahul Leslie

    Multi point response spectrum

    The same thing I’m also interested in knowing about. All I know is that for a set of PSD curves to be applied on a structure, you have to process and determine another set of Cross-PSD, derived for all combinations of PSD’s, like C-PSD(i,j) derived from PSD(i) and PSD(j) (and obviously not for...
  9. Rahul Leslie

    Ansys APdl solid or shell element smeared Reinforcement?

    Just model the slab with solid elements, with the outer layers matching the concrete cover, and the layers next to the outer layers not much thicker than the depth required by the two overlaid reinforcement layers (one perpendicular to the other) together. Also for the layers next to the outer...
  10. Rahul Leslie

    Ansys APdl solid or shell element smeared Reinforcement?

    I know only SOLID65 having such features... Not sure whether any new element can take 'Concrete' properties. With smeared reinforcement approach, I presume the following will do: cross section of slab shown Rahul Leslie
  11. Rahul Leslie

    User Defined Wind Loads & Diaphragms

    Hi.. I presume all that was asked about has been answered. But still I shall put in my view As far as I know, for rigid diaphragms: (1) The central node of the diaphragm is located at its centre of mass, where the seismic loads are applied. (2) Wind load in each direction is to be applied...
  12. Rahul Leslie

    ANSYS APDL - How to create Joint at the connection of three beam elements?

    Hi.. With BEAM44, one could define element types with end-releases, and use them in cases such as this one. Not sure whether BEAM44 is in active library now, or legacy, or totally discontinued. Maybe you can replace one element at the connection end of the meshed beams with BEAM44. Key-options...
  13. Rahul Leslie

    Pushover analysis for user defined material and links

    Not sure, but it is worth a try: Since you’re using links, I’m sure you must have stumbled upon this -- see fig. of screenshots attached (although from ETABS, corresponding ones should be there in SAP2000). Ignore values shown (only meant to show how the curve goes)... still not sure whether...
  14. Rahul Leslie

    Helix - SAP2000 - Show without twist the elements

    You may get a break by changing the approach of modelling. This is because SAP2000, like most other packages, for beam elements, assume the local axis-2 (local y-axis in STAAD) to be perpendicular to the beam axis, lie on the vertical plane passing through the beam, and point upwards. So...
  15. Rahul Leslie

    Signing CQC modal cases

    << My question is what is SAP2000 doing? >> SAP2000 doesn't do this, because it hasn't included the 'Dominant mode signage' (DMS) option in it: Probably because Prof. Edward Wilson -- the developer of the original 1973 SAP-IV, and still an associate of the SAP2000 research team -- hasn't yet...
  16. Rahul Leslie

    Reponse Spectrum Method Applicability

    Hi KootK, Your book suggestion is excellent -- it does go into the fundamentals of RSA. Hi everyone, I happened to read a few of the earlier thread (I have joined the forum only recently), and happen to come across the thread on doing RSA with P-Delta effects included...
  17. Rahul Leslie

    Signing CQC modal cases

    Presume ROBOT is trying to do Dominant Mode Signage, where, after doing the SRSS/CQC method, gives for each quantity (BM, SF, etc.) the sign obtained for that quantity at that location for a single mode analysis -- the analysis for the Dominant Mode. Packages with this feature (not SAP2000)...

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