Hi
I have general question about use of appropriate waves while creating foundation superelements:
Psi module: What do pair of forces mean in X and Y directions
For Fatigue Analysis: Is it correct to use centre of damage wave and combine this with persistent dead and live platform loads to create superelement within psi? Then do I need to put this combination same for 1st pair (x and y direction) as well as 2nd pair (x and y directions)
For mode shapes: Do we need to use operational wave in combination with persistent dead and live loads? Again how to insert it for 1st and second pairs and x and y directions?
For seismic analysis: What operational waves to be taken into account? Is it 1 year wave? Again how to insert it for 1st and second pairs and x and y directions?
Many thanks.
Just apply and acceleration to the mass of the structure which will reflect the ground motion acceleration. Look at your seismic spectrum. It should give you a good indication of the acceleration your structure will experience. As I previously stated, the process is iterative as the stiffness of the piles will affect your seismic response.
Regards,
Geoff
If you will refer to my previous post, I suggest using an acceleration instead of environmental loading because that will more closely match the seismic loading.