SandorR
Student
- Dec 17, 2020
- 16
EN 1993-1-1, clause 5.4.2(2) states:
"Internal forces and moments may be calculated according to elastic global analysis even if the
resistance of a cross section is based on its plastic resistance, see 6.2."
We can use elastic global analysis to compute our loads on structural components, but then check their resistance according to full plastic resistance. I'm curious, how does this give correct/conservative results?
If we increase our loads assuming linear theory and stop where the loads exceed the plastic capacity, would we not get possibly incorrect results? In reality as we are approaching the plastic limits, there is for example already significant redistribution of moments taking place.
Could somebody maybe provide some understanding as to why this method works?
Thank you!
"Internal forces and moments may be calculated according to elastic global analysis even if the
resistance of a cross section is based on its plastic resistance, see 6.2."
We can use elastic global analysis to compute our loads on structural components, but then check their resistance according to full plastic resistance. I'm curious, how does this give correct/conservative results?
If we increase our loads assuming linear theory and stop where the loads exceed the plastic capacity, would we not get possibly incorrect results? In reality as we are approaching the plastic limits, there is for example already significant redistribution of moments taking place.
Could somebody maybe provide some understanding as to why this method works?
Thank you!