...
Calculation of Environmental Durability Factor
...
where f_s can be calculated as:
Exposure | One-way | Two-way |
|---|---|---|
Normal |  |  |
Severe |  |  |
The strain gradient amplification factor (beta) in these equations is calculated as:
...
It is permitted to use beta of 1.2 if h >= 16” and 1.35 if h < 16”.
It is also permitted to use 25 for the 4(2 + d_b/2)^2 term as a simplificationis 20,000 psi for normal exposure and 17,000 psi for severe exposure.
Example calculations are attached at bottom of this page.
Applying the Environmental Durability Factor in Eriksson Culvert
...
Eriksson Culvert will then automatically calculate the required durability factors and multiply the design moments by them, creating a more conservative design. The calculated factors will be displayed in the text report for your reference:
...
| View file | ||
|---|---|---|
|