I'm working on a mat slab on grade to support a silo at a concrete batch plant and wanted to model the slab in RAM Concept.
1. Our model for a slab on grade has flagged ACI318 section 7.12. Per ACI318 section R7.12.1, this section is not for slabs-on-grade. Why does RAM Concept check temperature and shrinkage reinforcement for a mat slab on grade, and is there a way to turn off this check?
2. Is there a way to change RAM's program assigned distributed reinforcement default output from number of bars to a bar spacing (without changing to user defined bar spacing)?
3. Is there a way to view/output the formulas and calculations (for a report), similar to RAM Connection's reports?
1. ACI 7.12 is included in the Code Minimum Designer for both Elevated and Mat Foundations. The application to mat foundations follows from ACI 10.5.4, which is also waived for soil-supported slabs. To disable this check, you can either delete the Code Minimum Rule Set or edit the span segments and set Code Minimum Reinforcement Location to "None." Both of these options will completely disable all code minimum reinforcement checks.
2. Please see the frequently asked question, "How can I change the format of reinforcement on the Reinforcement Layer?" on the web page below for details:
http://communities.bentley.com/products/structural/structural_analysis___design/w/structural_analysis_and_design__wiki/8362
3. Unfortunately, RAM Concept does not report detailed formulas like RAM Connection. The Cross Section Auditor in RAM Concept summarizes details of each design check. See Chapter 32 "Using the Auditor" in the RAM Concept Manual for more information on the Cross Section Auditor.
Answer Verified By: Ryan Ankabrandt
1. To apply both top and reinforcement to the code minimum requirement, you can use user reinforcement and define the Slab Face = "Both." See the frequently asked question, "What is the significance of defining the reinforcement "Slab Face": Top, Bottom, or Both?" on the web page below for more discussion:
2. The ACI equations used to calculate the punching shear capacity are discussed in Section 68.5.2 "ACI 318 Specific Provisions" in the RAM Concept Manual. The equation used to calculate the punching shear demand is listed in Section 68.5.1 "Critical Section Properties and Equations for Actual Stress."