If you want a node to act as a support, at least one of its degrees of freedom must be restricted by a spring or blocked. In addition, the node must be a part of a surface or member. The forces, originating from the support and counteracting, are called support reactions.
Nodal supports are required to apply imposed deformations and can be provided with nonlinear properties (failure criteria for tensile or compressive forces, working and stiffness diagrams).
- Movable supports allow rotations around the support point and displacements in direction of the trajectory. The displacement perpendicular to the movement will be blocked. Movable supports are described as structurally single-valued due to the removal of a degree of freedom.
- Fixed supports or support hinges also allow rotations about the support point, but prevent horizontal or vertical displacement options. Fixed supports are described as structurally two-valued due to the removal of two degrees of freedom.
- Rigidly fixed supports block both rotation and displacement. Rigidly fixed supports are described as structurally three-valued due to the removal of three degrees of freedom.
Entering in RFEM and RSTAB
Nodal supports can be entered graphically and defined in RFEM and RSTAB by using 'Insert' → 'Model Data' → 'Nodal Supports' → 'Graphically', by using the corresponding button or tables of the Data Navigator.
Before creating a structural model, every user is giving thoughts to the boundary parameters of the system and how to best represent the model. Special attention should be paid to the orientation of the global coordinate system.
- How can I change the colors of the selection and preselection?
- After the calculation in the RF‑/DYNAM Pro - Equivalent Loads add-on module, the size of my file has increased significantly. The performance has worsened enormously. What could be the reason for this?
- Is it possible to make the generated member loads from area loads via plane to act eccentrically on the member cross-section?
- Why are my imperfections displayed graphically in different ways and can I adjust the display?
- What happens with the programs and add-on modules in the case of the timeout of a network license? And how can I increase the timeout?
- Why is it not possible to select a load case in the RF-/STEEL add-on module for design, although it is defined in RFEM/RSTAB?
- Does the load generation also work for curved members?
- What effects can renumbering elements have on the printout report and the add -on modules?
- In my model, some surfaces are displayed in gray, while others are displayed in white without a gray filling. The "solid transparent" display type is selected for the graphics. How can all surfaces be displayed in gray?
- How can I get the member end forces to design the connections?
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
The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions