I have run an modal analasys and a seismic analysis witch generates forces. Ive had a lok kat the mambrane forces in the plate but there are only tention forces.why aren't there any comp. forces? does the seismic force witch is gen. for the x- dir. the max respons of the quanteties in +x and -x dir. tis is not on the basis of latheral force method where the signs of the forces ar ceept.
is it the -Nyy/Nyy as the compretion/tenstion??? Need explantion
You should look at results for particular mode rather than CQC combination unless you create the signed quadratic combination.
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