Do I have to reanalyze my mat foundation model every time I open it in STAAD Foundation Advanced to get back the results ?

STAAD Foundation Advanced does NOT retain design data but it DOES retain analysis data. For example, if you have analyzed and designed a mat foundation and get out of the file and get back into it, you will be able to see the displacements, displacement summary, plate stress, plate stress summary in the output section. You will also be able to go to Mat Foundation Job > Mat Analysis/Design options > Output View Options and plot the plate stress or the soil pressure contours. In addition, you can go to the Calculation sheet and view the input or analysis related data like Job details, Load details, Mat Property, Soil Property, Analysis results like node displacement summary or plate stress summary. The above would NOT require a re-analysis of the model as the analysis data is retained by the software.

The design related data however is not retained. So to get the reinforcement calculation for the various zones you would have to run the design and do the reinforcement zoning before you can get the design data back. This design process however is very quick. It is the analysis that takes more time. Once you finish the design and reinforcement zoning, you will be able to get the reinforcement design calculations in the Calculation Sheet.