The ratios for member 1 and 2 were 0.025 when the applied wind load was 0.02 KN. The ratios changed for both columns to 0.918 when the wind load was increased to 50 KN.
For the member 3, the failure was due to slenderness as I already explained in my earlier post and so this ratio is independent of the load you apply. Hence ratio would not change even if you increase the load from 0.02 KN to 50 KN. You need to either bypass the slenderness check or use a bigger section to make it pass.
The 350 mm+ displacement I was referring to, was for the case when wind load was increased to 50 KN. The screenshot below shows that
