Load Group in Staad Physical Modeller

Question

Can you help me understand how the Load Group should be used in the Staad Physical Modeller? 
 
 Thanks!

Modestas · Answer

Load Groups in the Physical Modeler are the equivalent to the Reference Loads in the Analytical Modeler. The main difference between Reference Loads and simple Load Case is that Reference Loads are not analyzed by the program. Some more details on this can be found here: communities.bentley.com/.../reference-load-case 
 When creating Load Combinations in the Physical Modeler, you can select an option "Include Load Groups" which allows to use Load Groups (or Reference Loads) as well as Load Cases in the Load Combinations. As you noted, if you will be performing a non-linear analysis, it is necessary to set the option of Combination Load Cases to "REPEAT Primary Load Cases" in the File -> Options -> Analysis model. This will combine the Load Groups or Load Cases as Repeat Loads rather than usual Load Combinations. 
 So for complex large models with non-linear analysis using the Load Groups will save the analysis time. If the model is simple and takes several seconds to analyze it, then using Load Case will be fine too. 
 You may check this Wiki as well for more details on Reference Loads: Reference Loads An Introduction - RAM | STAAD | ADINA Wiki - RAM | STAAD | ADINA - Bentley Communities

Load Group in Staad Physical Modeller

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