I think there is a problem with the load case list, when defining a moving load.
I define a moving load case #101 "HS20-16a" and then run calculations. Robot automatically creates two more cases HS20-16a (+) and HS20-16a (-). This is normal and OK.
I then define a combination call it #102 "1.2g + 1.5TRUCK".
It appears in the calculations box, the load types box, and the combination table. So far so good. See pics;
Robot then automatically creates the (+) and (-) cases for the new combination case. However unlike with the simple case, Robot duplicates the originally defined combinateion with a new case, #7. There are now two combinations called "1.2g + 1.5TRUCK". There is a difference between the two dialogue boxes. See pic;
My steel design still checks case 102. ;
This is actually VERY DANGEROUS as you may be checking an envelope of cases including #102. You will only be told the controlling case, and may assume another case is the worst one, when actually Robot is just using Zero as all member forces for the case you intended to check for.
Additionally, there is no case 102 in the drop down;
Please advise if this is a known issue and if it's planned to be fixed. On top of that, it seems to me silly that Robot adds the two (+) and (-) cases into a different order on the list. Makes organising the list of cases difficult. If I manually change the case number, next time I run analysis it goes back to the previous.
Why can't the user specify the case number for the two additional cases?
Solved! Go to Solution.
No, it's different to the post you refer to. I understand that I need to use the case with no (+) or (-), which I have done.
The problem in this case is; I defined my combination as case 102. Robot has then created 3 (not 2 as usual) extra cases.
The results are not shown in my case I created, but in the new duplicate case.
Case 102 shows up in some dialogue box but not another. Worse, the steel design module recognises case 102 which nas no results in it.
This moving load cases bug is creeping around again
Please see pictures below. I have 5 moving load cases. Then I create 3 case combinations.
Case 100 is renamed to case 41. I don't think it should be renamed, but it happens.
Case 101 and 102 do NOT generate an envelope, and they DO NOT generate any internal forces / results.
I will send file via email for checking. Thanks,
hmmmmm that one. bit embarrasing not getting that! cheers,
SUGGESTION: if robot has more cases than the default limit, the program can SHOW A WARNING MESSAGE! hahah