What are the differences between a line hinge and a line release?


Line Hinge:

Line hinges control the connections between surfaces. It is possible to consider entire decouplings of surfaces or elastic couplings by means of linear springs.
when using a line hinge, the stiffness in the adjacent first element row of the assigned surface is reduced according to the selected degrees of freedom. In concrete construction can be used to define an assembly gap. In timber construction, modelling with line hinges is necessary due to the very limited rotation transmission of forces.

Line Release:

Line releases allow you to decouple elements connected to a line (members, surfaces, and solids). A new line is generated at the same location, which only transfers the locked degrees of freedom. A line hinge can, however, also consider nonlinear effects (see Figure 2).

First, the line release type must be created. Thus, the program defines the open degrees of freedom or spring constant and, if necessary, nonlinearities. Then, you can apply the line release to members, surfaces, and solids on single lines. You can also manipulate the axis system of the release in the same dialog box.

If line hinges have already been used in a position, they can be quickly converted to a line release (see Figure 3). In this way, it is very easy to consider nonlinear effects in the structure.


Line release Line hinge Differences line release line hinge



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