The Minimum f'c Report: "This report shows the minimum required concrete strength to satisfy the compressive stress requirements. The required concretecompressive strength for top and bottom of the section are reported in separate columns."
Is this report giving the required minimum concrete strength or a ratio? The column headings are in ksi not C/D ratio.
The report flags values less than 1.0.
The graphic output shows Force (ksi) vs. Position along box girder (ft).
The program is comparing the calculated compressive Stresses against the allowable compressive stresses.
Thank you for the feedback.
Your initial response states the value is the required minimum concrete strength in KSI. Your second response states it is a comparison. Do you mean a ratio?
When I check the calculated top and bottom stress for each load case against the allowable, I cannot validate the minimum f'c in the report.
Load Case 4 at 0.02 of span
Allowable f'c = 3.6 ksi
Calculated from analysis: Bottom Min= -0.543 ksi, Max = -0.024 ksi
Min f'c Report: Bottom 0.876* ksi