Lateral rigidity of moment frame and shear wall

[Samuee]

Hi wall, recently I have created 3 models of lateral frame and compare their lateral rigidity

1) 300mm think box 8m x 8m shear wall, 30m high
2) moment frame 30m high with 5story (6m each), and 3 bays(8m each bay),2 abyss in transverse direction. Means on plan there are 4x2 = 8 columns
Columns are rc column 600mm x 1000mm, beams are 400mm x 600mm deep
3) combination of 1 and 2

They are all subject to lateral load of 2500kN in total, I observe that top drift of 1 is 3.6mm and 2 is 49mm which is reasonable, for 3 the top drift become 2.8mm, however I observed that in model 3, over 99% of shear force is taken up by the wall, while only 20kN from 2500kN wind shear transfer to the column, is it reasonable? coz the moment frame should have a certain degree of rigidity 49mm vs 3.6mm top drift (7:100), if only 99% of shear is taken up by the core wall, it seems a bit weird

I also attach the etabs mode for your reference

Thanks buddy

 

[BradGile]

Your combined structure looks like a outrigger system so reasonable to me.

 

[Samuee]

Does it mean if I would like the column to share more significant amount of Shear, I need to connect them to core wall with stiffer elements like outrigger truss?