Answer:
The line release would not be effective for these loads; that is, Surface 1 and Surface 2 would be rigidly connected. You can activate the display of the line-release axis system in Project Navigator - Display under Model → Line Releases (see Image 01).To determine the direction for the nonlinearity definition, it is important to know how the released object moves relative to the line release axis system of the original element.
In Image 02, Surface 2 is defined as a released object with the line release uz fixed if negative vz. The loading shown under 1 and 2 would move the released Surface 2 against the z-axis of the line release axis system. Thus, the line release would not be effective for these loads; that is, Surface 1 and Surface 2 would be rigidly connected.
