3D vs 1D analysis

[uncracked]

Hi ,

I am trying to compare the results of a 3D analysis to 1D analysis for a 3 span continuous bridge (60'-75'-60'). I have placed a point load of 1kips on the centre of the intermediate span of the 1D model.. while i have a wheel loads (0.5 +0.5)kips on the centre of the intermediate span of the 3D FE model.

1) I am unable to get the same moment.. infact the moment in the 1D model is twice that from 3D model...

any suggestions..
Uncracked

 

[wiktor]

Your total (sum of all moments in all stingers) MY moment from the 3-D model should be almost equall to the moment from 1-D model, or check your input data.