Hello,
I am in trouble trying to generate a load combination between self-weight loads of a structure and moving loads on that same structure.
When I select the option "add new load cases > define combination", this is all I see:
As can be seen, on the right there are four load cases: one of self-weight and the other three of moving loads. However, in the left box ("add new load cases > define combination") I can only see the self-weight load, therefore I am not able to generate a load combination that includes all the load cases created (self-weight & moving loads).
Thanks in advance!
Ignacio
The moving load generations are not visible as these are not primary load cases. The easiest way to combine any existing primary load case with each moving load generation is to use the "Predefined Load to be Added" option and select the appropriate load as show next. If you double click on the GENERATE LOAD option from under the Load Case Details tree, you will get this Edit dialog box and you can then make the change.
Answer Verified By: Ignacio Rojas
Thank you very much!
As you can see, i used the "predefined load to be added" (as you told me) to add the self-weight load to all three moving load generations. But what if i want to combine more than one moving load generation? In this case, for example, the three of them. How can i do that?
You will find the answer in the post below
https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/177928/is-there-a-way-to-add-two-different-moving-loads-in-a-combination
Thank you Sye.
Here is the editor sheet:
STAAD SPACESTART JOB INFORMATIONENGINEER DATE 29-Sep-20END JOB INFORMATIONINPUT WIDTH 79UNIT METER KNJOINT COORDINATES1 0 0 0; 2 0 0 23.15; 3 18.3 0 0; 4 18.3 0 23.15; 5 0 0 6.5; 6 18.3 0 6.5;7 0 0 14.3; 8 18.3 0 14.3; 9 0 0 21.6; 10 18.3 0 21.6; 11 0 -15.15 6.5;12 18.3 -15.15 6.5; 13 0 -15.15 14.3; 14 0 -15.15 21.6; 15 18.3 -15.15 14.3;16 18.3 -15.15 21.6; 17 0 -5.65 6.5; 18 0 -5.65 14.3; 19 0 -5.65 21.6;20 0 -6.6 6.5; 21 0 -7.55 6.5; 22 0 -8.5 6.5; 23 0 -9.45 6.5; 24 0 -10.4 6.5;25 0 -11.35 6.5; 26 0 -12.3 6.5; 27 0 -13.25 6.5; 28 0 -14.2 6.5;29 0 -6.6 14.3; 30 0 -7.55 14.3; 31 0 -8.5 14.3; 32 0 -9.45 14.3;33 0 -10.4 14.3; 34 0 -11.35 14.3; 35 0 -12.3 14.3; 36 0 -13.25 14.3;37 0 -14.2 14.3; 38 0 -6.6 21.6; 39 0 -7.55 21.6; 40 0 -8.5 21.6;41 0 -9.45 21.6; 42 0 -10.4 21.6; 43 0 -11.35 21.6; 44 0 -12.3 21.6;45 0 -13.25 21.6; 46 0 -14.2 21.6; 47 18.3 -5.65 6.5; 48 18.3 -5.65 14.3;49 18.3 -5.65 21.6; 50 18.3 -6.6 6.5; 51 18.3 -7.55 6.5; 52 18.3 -8.5 6.5;53 18.3 -9.45 6.5; 54 18.3 -10.4 6.5; 55 18.3 -11.35 6.5; 56 18.3 -12.3 6.5;57 18.3 -13.25 6.5; 58 18.3 -14.2 6.5; 59 18.3 -6.6 14.3; 60 18.3 -7.55 14.3;61 18.3 -8.5 14.3; 62 18.3 -9.45 14.3; 63 18.3 -10.4 14.3; 64 18.3 -11.35 14.3;65 18.3 -12.3 14.3; 66 18.3 -13.25 14.3; 67 18.3 -14.2 14.3; 68 18.3 -6.6 21.6;69 18.3 -7.55 21.6; 70 18.3 -8.5 21.6; 71 18.3 -9.45 21.6; 72 18.3 -10.4 21.6;73 18.3 -11.35 21.6; 74 18.3 -12.3 21.6; 75 18.3 -13.25 21.6;76 18.3 -14.2 21.6;MEMBER INCIDENCES1 1 5; 2 3 6; 3 5 17; 4 17 20; 5 7 18; 6 18 29; 7 9 19; 8 19 38; 9 20 21;10 21 22; 11 22 23; 12 23 24; 13 24 25; 14 25 26; 15 26 27; 16 27 28; 17 28 11;18 29 30; 19 30 31; 20 31 32; 21 32 33; 22 33 34; 23 34 35; 24 35 36; 25 36 37;26 37 13; 27 38 39; 28 39 40; 29 40 41; 30 41 42; 31 42 43; 32 43 44; 33 44 45;34 45 46; 35 46 14; 36 6 47; 37 47 50; 38 8 48; 39 48 59; 40 10 49; 41 49 68;42 50 51; 43 51 52; 44 52 53; 45 53 54; 46 54 55; 47 55 56; 48 56 57; 49 57 58;50 58 12; 51 59 60; 52 60 61; 53 61 62; 54 62 63; 55 63 64; 56 64 65; 57 65 66;58 66 67; 59 67 15; 60 68 69; 61 69 70; 62 70 71; 63 71 72; 64 72 73; 65 73 74;66 74 75; 67 75 76; 68 76 16; 69 5 7; 70 9 2; 71 7 9; 72 10 4; 73 8 10; 74 6 8;DEFINE MATERIAL STARTISOTROPIC CONCRETEE 2.17185e+07POISSON 0.17DENSITY 23.5616ALPHA 1e-05DAMP 0.05TYPE CONCRETESTRENGTH FCU 27579END DEFINE MATERIALMEMBER PROPERTY AMERICAN1 2 69 TO 74 PRIS YD 0.7 ZD 1.23 TO 68 PRIS YD 0.8CONSTANTSMATERIAL CONCRETE ALLSUPPORTS1 3 FIXED17 TO 76 FIXED BUT FY MX MY MZ KFX 24592.6 KFZ 24592.611 TO 16 PINNEDDEFINE MOVING LOADTYPE 1 LOAD 88.75 88.75DIST 6.3 WID 18.3TYPE 2 LOAD 154 154DIST 6.3TYPE 3 LOAD 18 18DIST 6.3LOAD 1 LOADTYPE None TITLE DEAD LOAD ESTRUCTURASELFWEIGHT Y -1 LOAD GENERATION 10 ADD LOAD 1TYPE 1 9.15 0 0 ZINC 2LOAD GENERATION 10TYPE 2 0 0 0 ZINC 2LOAD GENERATION 10TYPE 3 18.3 0 0 ZINC 2LOAD COMBINATION 2002 1.0 12 1.0 22 1.0 PERFORM ANALYSIS PRINT ALLPERFORM ANALYSIS PRINT ALLFINISH
In bold type I have highlighted the load combination for the three moving loads, with multiplier factors equal to 1.0.
However, the moving loads range from 2 - 11 (type 1), 12 - 21 (type 2), 22 - 31 (type 3). So, my question is whether these multiplier factors affect all moving loads (30 total) or only the loads that correspond to the numbering 2, 12 and 21, as it is shown in bold font.
Thank you again!
Just 2 12 and 22