i am currently designing an irrigation channel which requires application of compression springs along with seismic loads. i have defined seismic loads first (load no. 4). i have used repeat load cases to combine all the loads.
In summary, i can see the moments being introduced due to seismic forces but it seems they are not being combined with other load cases. For eg. the forces summary for load cases excluding and including seismic forces is exactly the same (shown in figure below)?
i am unable to exactly pin point the problem as to why earthquake effect is not combining?
Load case definitions
load case (without seismic load)
load case (with seismic effect)
What is the answer to this? I am experiencing the same problem.
Please be sure to add the following commands after each seismic load case
PERFORM ANALYSIS
CHANGE
This is required when you are trying to combine seismic loads with other loads using REPEAT LOADs.