In a time history analysis, why don the pipe forces for each element add up to the load shown for a support?
A-5. The idea that the pipe forces for each element should add up to give you, say, a support load at a limit stop would be correct in a time independent analysis (W, P, T1, etc.). But, in a time history analysis, the values you see for any entity (displacements, support loads, pipe forces, moments etc.) are the enveloped values (i.e., the absolute maximum value of [for that node] the entity when compared with values at all time steps). So, there is no telling whether the numbers are going to add up.
