Bending moment capacity added to calculation sheets
10th August 2009
In the calculation sheet for pipes and combined walls and the calculation sheet for sheet piles, a cell has been added to show the bending moment capacity. To calculate the bending moment the steel grade can be selected from a drop down list.
The bending moment capacity M is the product of the section modulus W_{x} and the minimum yield strength f_{y}:
M = W_{x} × f_{y}.
For combined walls the bending moment capacity is calculated with the formula:
W_{x} = (I_{prim} + I_{sec}) / (0,5 × Ø × b)
with
I_{prim}  moment of inertia of the tubular piles 
I_{sec}  moment of inertia of the intermediate sheet piles 
Ø  outside pipe diameter 
b  system width = Ø + width of intermediate sheet piles + 5 cm (width interlocks) 
