Phase2 Model > Loading > Liner Moments
The Liner Moment options in the Loading menu of the Phase2 Model program, allow you to define moment and rotation boundary conditions for Liners.
Add Liner Moment
The Add Liner Moment option allows you to apply an active (non-zero) moment load to a Liner.
Add Liner Hinge
The Add Liner Hinge option allows you to specify a zero bending moment condition for a Liner (i.e. the location of a "hinge" which allows the liner to freely rotate at that point).
Liner Moment versus Liner Hinge
It is important to understand the difference between the Add Liner Moment and Add Liner Hinge options in Phase2:
When you define a moment load with the Add Liner Moment option, the moment is applied as an initial loading condition to the Liner.
When you define a hinge with the Add Liner Hinge option, a zero bending moment condition will be enforced at that point. The Liner will be free to rotate about the hinge. Axial force and shear force in the liner can be transmitted across the hinge location, but the bending moment at the hinge will remain zero throughout the analysis.
A Liner Moment = 0 (applied with the Add Liner Moment option) is NOT equivalent to a Liner Hinge. A Liner Moment = 0 would have no effect on the analysis (i.e. this simply means that no load is applied). For this reason, Phase2 does not allow you to add a Liner Moment = 0.
Add Rotation Restraint
The Add Rotation Restraint option allows you to specify a clamped condition (zero rotation) for a point on a liner. This allows you to model clamped conditions at the end of a beam, for example.