Include Moving Load in Load combination

I have generated the moving live load using... However, I am not able to include the generated moving live load in the load combination...Can someone guid eme how to include the generated moving live load in the load combination ??? 

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  • The generated moving loads can be combined with other loads using one of the 2 methods listed next

    First option: (Supported by both GUI & editor)

    When you apply the moving load from within General > Load & Definition > Load Case Details you will see the option as highlighted

    You need to select an already defined load that want to add to each and every generation of the moving load.

    If there are multiple such cases that you would like to add, you would first need to generate a REPEAT LOAD with those existing cases and then use the REPEAT LOAD as the predefined load to be added. An example (using the editor) is provided next.

    Say you have a situation where you would like to add dead load (load case 1) and imposed load (load case 2) with the generated moving load cases, you would first define a REPEAT LOAD (load case 3) which would combine the loads 1 and 2. Subsequently this load 3 would be added to each generation of the moving load case as explained next.

    LOAD 1 DEAD LOAD

    SELFWEIGHT Y -1

    LOAD 2 IMPOSED LOAD

    MEMBER LOAD 1 TO 6 12 TO 17 23 TO 28 34 TO 39 45 TO 50 UNI GY -1

    LOAD 3 DEAD + IMPOSED

    REPEAT LOAD

    1 1.0 2 1.0

    LOAD GENERATION 10 ADD LOAD 3

    TYPE 1 7.5 0 0 ZINC 10

    Second option: (editor based only)

    One can use a manual procedure of typing the data in using the editor, as shown below.

    DEFINE MOVING LOAD

    TYPE 1 LOAD 20. 20. 10. DISTANCE 10. 5. WIDTH 10.

    LOAD 1

    SELF Y -1.0

    LOAD GENERATION 10

    TYPE 1 7.5 0. 0. ZI 10.

    PERFORM ANALYSIS

    CHANGE

    load combination 101 1 1.0 2 1.0

    load combination 102 1 1.0 3 1.0

    load combination 103 1 1.0 4 1.0

    load combination 104 1 1.0 5 1.0

    PERFORM ANALYSIS

    FINISH



  • Can you pls screenshot  how do you add in the generated load case into the repeat load command? 

  • It's opposite - you need to add the Repeat Load (or primary load case) into the Moving Load Generator:



  • Do you mean I shall add in defined repeat case as (actor 1* dead load) + (factor 2 * imposed load), now repeat case become load case 3 , then in generate load command, add in the load case 3 as predefined load ?? 

  • Btw, I want the generated load to be factored, by doing this way only the DL and IL defined earlier are factored, the generated load case isn't factored .... How to make the generated load case bcome factored ? Why is it impossible to degine a load combo directly factor the DL, IL and generated load case ? 

  • Do you mean I shall add in defined repeat case as (actor 1* dead load) + (factor 2 * imposed load), now repeat case become load case 3 , then in generate load command, add in the load case 3 as predefined load ?? 

    Yes.



  • Btw, I want the generated load to be factored, by doing this way only the DL and IL defined earlier are factored, the generated load case isn't factored .... How to make the generated load case bcome factored ? Why is it impossible to degine a load combo directly factor the DL, IL and generated load case ? 

    You can create the factored combinations of moving loads by using the STAAD Editor as explained in the second option posted previously.



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