The Allowable Stresses tab allows you to define inputs for the calculation of allowable in-service tension and compression concrete stresses. The program can automatically check the stresses over the entire foundation and report the stresses graphically, as well as in tabular form, indicating the locations where the calculated stresses exceed those entered in this tab.
Note that within ADAPT-SOG, the stress checks are limited to the fiber stresses due to the combined action of bending and axial forces. The shear forces for each Design Strip are reported, but the shear stresses are not calculated.
The following table provides descriptions for the settings sections that appear on the SOG Allowable Stresses panel, based on the module and unit system you are using.
SOG Allowable Stresses Settings
| Setting | Description |
|---|---|
|
The SOG Allowable Stresses settings apply to the structural behavior of concrete slabs and beams that are subjected to tension and compression. |
|
|
Tension stresses as multiple of √f'c |
Settings are:
The program default allowable value for calculated tensile stress are: US Units: ft = 6*√f'c SI Units: ft = 0.5*√f'c MKS Units: ft = 1.62*√f'c |
|
Compression stress as multiple of f 'c |
Settings are:
The program default allowable value for calculated compressive stress for all units is: fc = 0.45*f'c |
|
Shear stresses |
The shear forces for each Design Strip are reported, but the shear stresses are not calculated. The program default allowable value for calculated shear stress are: US Units: vc = 1.7*√f'c + 0.20fp SI Units: vc = 0.14*√f'c + 0.20fp MKS Units: vc = 14.26*√f'c + 0.20fp |