D12.A.6.3 Pipe profile
The von Mises stress is checked in three stress points as shown in figure below.
Stress points for a pipe section
Section properties
- d = D - 2t
- r = 0.5 ( D-t )
- a = tan-1 Mz/My
- Ax = π/4 (D2 - d2)
- Ay = Az = 0.5Ax
- Ix = 2Iz =π/32 (D4 - d4)
- Iy = Iz = π/64 (D4 - d4)
Note: In STAAD.Pro, slightly different values are used for Ay , Az
and Ix , however this has insignificant influence on the force
distribution.
- AY = Az = 0.6Ax
- Ix = 2πR3t