Checking reactions in the support
Checking the support reactions after analysing the structure is done with the following option, available in the "Stress / Strain" group of the upper toolbar in the "Analysis" tab (in the "Structure" tab):
Reactions
The "Reactions" option is used to display the reactions on the external supports or links, i.e. the forces exerted on the modelled structure by the terrain or the supporting elements.
By left-clicking on a defined node with external linking, the program will display the forces and reaction moments in the three spatial directions.
The values of the reactions are referenced to the global axes of the model. A reaction force with a positive sign follows the positive direction of the axis. Moments referenced to an axis indicate a rotation about that axis, being positive in the counterclockwise direction.
In the "Properties - Reactions" dialogue box that appears, there are three options to choose from.
- By choosing "Selected combination" the particular loadcase or combination of loadcases to be checked is specified.
- By selecting "Simple loadcase", a specific loadcase can be selected from the drop-down menu to check the support reactions associated with that loadcase.
- The other options in the drop-down menu correspond to the different groups of loadcase combinations defined in the model ("Displacements", "Rolled and reinforced steel", "Cold formed steel", "Timber", "Aluminium", "Concrete", "Concrete in foundations" and "Ground bearing pressures").
- By choosing "Foundation equilibrium combination envelopes", the maximum and minimum values of the group of combinations used in the equilibrium checks of the foundation elements are displayed.
- Selecting "Bearing pressure combination envelopes" displays the maximum and minimum values of the group of combinations used in the ground stress checks.
The values do not have to match between the latter two, since the majorisation and combination coefficients are different for each combination of loadcases.
Finally, to hide the displayed information, left-click on the support again.
