I am checking an existing elevated mat two way slab. I only included a small dead load to make sure the model would run correctly and the design status is showing failures in sections. The floor was originally designed for a live load of 150 psf and the only load that is applied is 10 psf as an arbitrary dead load. When I audit the individual sections, the report shows no failures.
Failures in Ram Concept are denoted with the crack symbol on the specific section, or sections, that fail. If you audit one of those sections it should provide the details of the failure. Most likely, your issue stems from some unusual cross sections (or cross section trimming) that is not what was considered in the original design.
Hi Seth, is there a way I can send you the model to look over?
You can attach it directly (zipped) to a reply post using Insert... or use the "Secure File Upload" link process below left.
20160104 - B Bldg - Penthouse-test.zip
Consider the basic case of strip 5-2. This looks like a classic drop panel span, and as such the cross section trimming should probably be set to "None" with a reasonable inter cross section slope limit (0.25 - 0.5), rather than trimming it to "slab rectangle". For more on design strips for drop panels, see: https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/4514/cross-section-trimming-tn
If these are just drop caps for punching and not drop panels, then that's another matter, and slab rectangle trimming or zero slope limit will work.
The other issues are for strips along walls where it may not be necessary for design checks, Here are some details on that: https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/138547/design-strips-walls/419614#419614
Beyond I find it can be helpful to allow the program to add reinforcement to see how much rebar the program will add and where even when the bulk of the reinforcement is user provided. When I tried that in your file (with the revised strips I mentioned above) I found rebar being added for ductility only (Section 10.3.5). This is happening since the bottom bars are continuous through the drop panels (but not at the bottom of the panels) and hence more top bars are being added to compensate. You may not want to consider the ductility design, at least not until the live loads are added. For more see "59.6.3 Section 10.3.5 Ductility (Non prestressed)" in the manual.