ORION 18: DEALING WITH LOAD COMBINATIONS


In this tutorial, I would explain how the Orion software deals with load combinations.


STEP 1

To get to the load combination settings, Click 'Run' in the menu toolbar, then select 'Building Analysis'. In the 'Building Analysis' dialog box that appears, click 'Load Combinations' to see all load combinations currently applicable to your project

Load Combination Editor
NB: In the above project, there is only one (1) load combination as I deleted most of the combinations here.


STEP 2

Orion has default settings for selecting load combinations which are easy to use. To test them, click 'Loading Generator' in the dialog box seen above. The 'Automatic Loading Editor' dialog box appears, 
Here, 'Notional Loading' is selected by default. We will now select 'Wind Load' as well. This results in the creation of eleven (11) load combinations with Wind Load and Notional Loads considered. To confirm this selection, Click 'OK'.

Load Combination Editor with Notional and Wind Load selected


STEP 3

Load combinations can also be added or removed individually. To add, click on  at the top left of the dialog box. The newly created load combination can be seen immediately below the highlighted load combination and is an exact duplicate. Double click on each field (G, GP1, GP2, etc) on the newly created load combination to manually change the factor applied to it. To remove a load combination, click on it and then click on 

Other available types of loadings included in Orion are Soil Pressure, Temperature loading and Stage Construction loading

To check the meanings of the different load types (G, Q, GP1, QP1, etc) as used in the loading combinations, click 'Load Cases'.

STEP 4

The patterned loads, GP1, GP2 etc are represented with signs such as (=_=_ for GP1, _=_= for GP2.) What these signs represent, GP1, for example, is that for GP1, adverse load is applied to the first (1st) span, beneficial load is applied to the second (2nd), adverse for the third (3rd) and beneficial for the fourth (4th.) The equal to (=) representing adverse loading and underscore (_) representing beneficial loading.

When you are done, click 'OK' to set the load combination.



ORION 18: DEALING WITH LOAD COMBINATIONS ORION 18: DEALING WITH LOAD COMBINATIONS Reviewed by Izu Obi on 23:37:00 Rating: 5

No comments: