***ERROR***ABOVE LINE CONTAINS ERRONEOUS DATA.

GOOD DAY.  I AM NEW TO USING STAAD. I HAVE A MODEL AND I INPUTTED THE LOADS ETC. AND UPON RUNNING THE ANALYSIS THIS ERROR MESSAGE KEEPS COMMING UP

***ERROR*** ABOVE LINE CONTAINS ERRONEOUS DATA

I HAVE TRIED TO RESOLVE IT, BUT TO NO AVAIL. CAN ANYONE HELP ME IN RESOLVING THE ERROR. IT WOULD BE GREATLY APPRECIATED.

I AM ATTACHING MY MODEL . PLEASE ANY ASSISTANCE WILL HELP. 

 Design Practice - Copy3.std

  • Hi Nigel,

    There is a load command under MEMBER RELEASE specification:
    ......
    MEMBER RELEASE
    420 421 423 426 429 430 435 TO 438 447 TO 450 459 TO 461 469 470 475 TO 477 -
    478 START MX MZ
    MEMBER LOAD
    1 TO 25 30 TO 35 76 77 79 81 TO 83 86 TO 92 94 TO 96 98 TO 100 102 TO 109 -
    ......

    which is not in place.
    Also, there are seismic UBC loads that should be first load cases - move them before all load cases, you can do it in the Input file.



  • thank you for your response andrejlogunov.. but i do not know how to do this.. please help
  • The easiest way to move the seismic load is to open up the editor ( Edit > Edit Input Command File ) and move the two seismic load cases 7 and 8 ahead of the load case 1.

    You have applied member release MX. Releases are applied with respect to the member local axis. So a release MX essentially means that the member is allowed to rotate about it’s own axis which is not that common. If you want moment releases about major and minor axes, you should release MY and MZ instead as shown next

    MEMBER RELEASE

    420 421 423 426 429 430 435 TO 438 447 TO 450 459 TO 461 469 470 475 TO 477 -

    478 START MY MZ

    However if you release the moments at the bases of the columns at the top floor, your structure is going to be unstable against lateral loads resulting in huge displacements. So you should either consider the bases as fixed or should consider adding braces to increase the lateral stiffness. For now I have commented out the releases. Even with the column bases fixed, the displacements in your model are quite high and you should definitely check on that and make changes to your structure, specially the top portion.  

    Also as Andrej has pointed out, you have a block of member load command that is not within any load case. You may want to move that under the appropriate load case. For now I have commented the block out.

    A modified file is attached for reference.

    Design Practice - Copy3_modified.std