Good Day,
I am currently evaluating the structural design of a 3-storey RC structure supported on a mat/raft foundation in STAAD Pro. To do this I created two models, one with isolated fixed supports and a second model with a plate mat. Upon completing the analysis for both models, I observed a significant variance in the force effects on my members due to the change in foundation type. Therefore my main queries are as follows:
1. Which support type should I use in STAAD Pro to accurately represent the support conditions of a mat foundation for a building.
2. Is it adequate to model my structure with fixed supports in STAAD Pro and then export these results to STAAD foundations to design the mat foundation.
Any assistance will be highly appreciated.
NB: I have attached the model with the isolated pads.communities.bentley.com/.../Wall-seperated-from-frame-_2B00_-isolated-pads.zip
Best Regards,