Hello. I am having trouble modeling design strips on a slab at a shear wall area, which cantilevers out at two sides around the shear core. I am using PT to attempt to limit deflection but I am having problem with top stress failure. I know I may have a problem even in the most optimal scenario, but I am having problem figuring out what that optimal design strip is. The south side of the shear core has a 4ft beam and a shear wall above it. The edges have a cmu block wall and a conc. roof (so the linear load is around 1000 lb/ft. I just needed help in figuring out were I should connect my design strips and under what criteria. There is a bridge at the southern most point being held by a beam to another building so I used a line support load to hold it. SLAB AREA PROBLEM.cpt
Some people ignore the strips parallel to and along walls. It's not a bad idea. See: https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/138547/design-strips-walls
For this case, the only failure I see is remote to the core, strip 3C-1. This is clearly a beam, 24" thick, but the design strip is quite wide, set to be designed as a two-way slab (and trimmed to a slab rectangle). That may be OK (all the tendons still pass through the trimmed cross sections), but a little surprising.
For general tips on design strips for beams see: https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/4507/ram-concept-design-strips-tn#beams
Some other strips in the model are probably not right either. Strip 2-1 encroaches into the same beam as noted above. Strip 5-1 also straddles the beam (and is highly skewed).