Robot Structural Analysis is over estimating loads in at least 10%. In an excersise, i have performed of a pretty simple structure where the spans are 5mx5m, without considering the self-weight and single-story. I have used panels for two-way distributed load and the value of this load is 200kgf. The column in the middle (axels 2-B) should have to support the load of 5mx5mx200kgf=5000kgf but as can be seen is 5537.87kgf. This means that the distribution and calculation of the loads transferend to columns is at least 10% OVER. So be carefull with the results. This over-estimated load seems to be reducted while the number of floors are added. Lets say, if a single-story is added, wich means that we have a two-story structure, the load in the base of the column in the first floor should be 10000kgf and with the 10% of the over-estimated load should be aroud 11000kgf, but instead is 10655.48kgf. A three-story structure under the same conditions should have a reaction in the same column of 15,000kgf, again, the reaction is 15664.77kgf.
