Line hinges control the connections between surfaces. It is possible to consider entire decouplings of surfaces or elastic couplings by means of linear springs. In concrete construction, a line hinge 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.
Types of Line Hinges
- Deformations of each FE node of the line of a surface can be released or coupled with a line hinge in x-, y- and z-direction.
- The rotation can be released around the longitudinal axis of a line.
Entering in RFEM
Line hinges can be defined by using the menu 'Insert' → 'Model Data' → 'Line Hinges'. In contrast to supports, the degree of freedom is activated for line releases by checking the box (for supports, the degree of freedom is then unchecked).
Besides the standardized gamma method, you can display the semi-rigid composite beams also as a framework model.
Depending on stiffness, mass, and damping, structures react differently to wind action.
Which units are specified in the result display of the support reactions (kN or kN/m)? A note about this is missing in the graphic.
In the case that the support reactions are given in kN/m, for which distance does the value apply?
- I design a cross-section created in the SHAPE‑THIN program by using the RF‑STEEL EC3 add-on module, but the program shows the error message "ER006 Invalid type of c/t-part for cross-section of type General." What can I do?
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I have modeled a ceiling slab supported on a shear wall. The shear wall should only absorb axial forces. So I have inserted a line hinge between the surfaces and defined it the way that the hinges are available for all internal forces except for those in the ux direction.
Although there is no hinge defined for ux, the plate deforms without being supported by the shear wall. Where is the error?
- Where do I find the setting to specify the entered structural component as a "wall" or "slab"?
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Is it possible to model and design tapered castellated beams in RF-STEEL AISC?
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Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements