Foundation-Plate Mat Support versus Plate Pin Supports

I have been designing an RHS with a base plate and gusset stiffeners. I've used master-slave command for the location of my loads and used Plate Mat Support as supports. The error was always "ERROR IN SUPPORT INPUT OR THERE IS NO SUPPORT INPUT. ANALYSIS WILL NOT BE PERFORMED. DATA-CHECK MODE ENTERED." even though the support command is clearly present in STAAD Command Editor, and acccordingly arranged with SLAVE command. What must be the error and solution for this?

Alternatively, I used plain pin supports located at every node of the plate of my model base plate. No error was found with this said model. How reliable is this compared to using Plate Mat Support? Thank you in advance!

Note: I'll post my model files after the shift. Local network has been locked for now. 

Parents Reply
  • Thanks for sharing the file. Here I think the value of subgrade modulus is creating the problem. You have used 200 kN/m2/m value which is kind of soft support and hence may be the displacement is so high the program is unable to find a solution. I would request you to review that part and use a higher value if possible. When as a trial I use 500 instead of 200 the file run without any error. One more point is that you have defined compression only springs which is causing some more issues in the model. If you change it to none most of the warnings will be solved.

    Thanks & Regards,
    Abhisek Mandal
    Global Technical Support

    Answer Verified By: Lake Osnaznara 

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