FAQ 002777 EN 3 April 2019

Markus Baumgärtel Modeling | Structure RFEM RSTAB

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


Line joint:

Line joints control the connections between surfaces. Thus, complete decoupling of surfaces or yielding couplings via linear springs can be considered.
The line joint functions to reduce the stiffness in the adjacent first row of elements of the associated surface according to the degrees of freedom chosen. In concrete construction can with a line joint z. B. an assembly joint can be defined. In timber construction, modeling with line hinges is necessary due to the very limited rotation transmission of forces.

Line release:

With line sharing, elements connected to a line (bars, areas, and volumes) can be decoupled from each other. A new line will be generated in the same place, transmitting only the locked degrees of freedom. In contrast, non-linear effects can be taken into account for a line joint (see Figure 2).

First, the line release type must be created. This defines the open degrees of freedom or spring constant and optionally nonlinearities. Subsequently, the line release for bars, areas and volumes can be made on individual lines. The axis system of the release can also be manipulated in the same dialog box.

If line joints have already been used in a position, they can be quickly converted to a line release (see Figure 3). This makes it very easy to consider nonlinear effects in the system.


Line release Line joint Differences line release line joint



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