RE: FAIL TO GENERATE A LOAD COMBINATION - DEFINE COMBINATION

Sye — Mon, 05 Oct 2020 21:17:44 GMT

Just 2 12 and 22

RE: FAIL TO GENERATE A LOAD COMBINATION - DEFINE COMBINATION

Ignacio Rojas — Mon, 05 Oct 2020 20:54:52 GMT

Thank you Sye.

Here is the editor sheet:

STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 29-Sep-20
END JOB INFORMATION
INPUT WIDTH 79
UNIT METER KN
JOINT COORDINATES
1 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 INCIDENCES
1 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 START
ISOTROPIC CONCRETE
E 2.17185e+07
POISSON 0.17
DENSITY 23.5616
ALPHA 1e-05
DAMP 0.05
TYPE CONCRETE
STRENGTH FCU 27579
END DEFINE MATERIAL
MEMBER PROPERTY AMERICAN
1 2 69 TO 74 PRIS YD 0.7 ZD 1.2
3 TO 68 PRIS YD 0.8
CONSTANTS
MATERIAL CONCRETE ALL
SUPPORTS
1 3 FIXED
17 TO 76 FIXED BUT FY MX MY MZ KFX 24592.6 KFZ 24592.6
11 TO 16 PINNED
DEFINE MOVING LOAD
TYPE 1 LOAD 88.75 88.75
DIST 6.3 WID 18.3
TYPE 2 LOAD 154 154
DIST 6.3
TYPE 3 LOAD 18 18
DIST 6.3
LOAD 1 LOADTYPE None TITLE DEAD LOAD ESTRUCTURA
SELFWEIGHT Y -1
LOAD GENERATION 10 ADD LOAD 1
TYPE 1 9.15 0 0 ZINC 2
LOAD GENERATION 10
TYPE 2 0 0 0 ZINC 2
LOAD GENERATION 10
TYPE 3 18.3 0 0 ZINC 2
LOAD COMBINATION 200
2 1.0 12 1.0 22 1.0
PERFORM ANALYSIS PRINT ALL
PERFORM ANALYSIS PRINT ALL
FINISH

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!

Ignacio

RE: FAIL TO GENERATE A LOAD COMBINATION - DEFINE COMBINATION

Sye — Mon, 05 Oct 2020 19:24:04 GMT

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

RE: FAIL TO GENERATE A LOAD COMBINATION - DEFINE COMBINATION

Ignacio Rojas — Mon, 05 Oct 2020 18:30:16 GMT

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?

Thanks in advance!

Ignacio

RE: FAIL TO GENERATE A LOAD COMBINATION - DEFINE COMBINATION

Sye — Mon, 05 Oct 2020 16:43:11 GMT

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.