Question.

How is the horizontal seismic force applied in AutoPIPE Vessel, is it a uniformly distributed load along the height of the vessel?

Answer:

The seismic force is distributed along the height of the vessel but not uniformly distributed, it is distributed as a proportion of the weight of each section times the distance from the datum:

Fx (horizontal force on a section) = Cvx * V

 

Where Cvx = wx.hx/(sum wi.hi), wx=weight of each section, hx = distance from the datum of that section.