Momen and shear effects of shell elements

[Shz713]

Hi all,

I have designed bridge deck using shell elements in CSIBridge. Since the solver and method of calculation is similar to other CSI products, I'm posting here. (Similar concrete bridges as shown in Watch and Learn videos for CSiBridge)

After running vehicular loading, I need to find the load effects due to the applied load, such as moment and shear. For shell elements, the result of stress and force can be displayed nicely. Thought, which one is the moment (M11,M22...) and correct shear (V12,V23,,,)?

I am fully aware of local axis direction, sign convention and other things, yet I cannot figure out which one represent moment and shear of let's say deck slab.

Link
Link

shed some lights on this matter pls

cheers

Shoot for the Moon, even if U miss, U still land among Stars!

 

[chekre]

M11, M22 are the moments in the 2 directions of the deck and M12 is the twisting moment.
If you want to know which one corresponds to which direction, display ur local axis and M11 is the moment along axis 1 as well for M22.
You can also check the magnitude of moment and deduce which one is your major and minor moment and reinforce your deck according to it.
same thing applies for shear.

 

[Shz713]

Dear Checkre,

Thanks for your input. local axis one is along the bridge center-line and local axes 2 is normal to bridge center-line. Which one can be taken as moment due to external load considering the fact the vehicle is moving in high speed and somehow both local 1 and local 2 axes are induced.
So I take M11 and M22 as moment? Average of them? maximum negative will be hogging moment and maximum positive will be sagging moment?

For shear, I take average of maximum and minimum of V12 and V23 respectively?

Cheers mate

Shoot for the Moon, even if U miss, U still land among Stars!