how can i apply these steps:

1-In the first step, the beams were simply supported at both ends. The column and the blind bolts were fixed temporarily in case of the motion of free bodies. Meanwhile, a low level of pretension was applied to all bolts to ensure that the contact interaction had been established.

2-In the second step, the temporary constraints for the column and blind bolts were removed, and the bolt pretension was increased to the value that was mentioned above. Simultaneously, the vertical loading was applied on top of the column through displacement control up to 110 mm.