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RF-/JOINTS Steel - Rigid Add-on Module for RFEM/RSTAB
Rigid Joints According to EN 1993-1-8
With the RF-/JOINTS Steel - Rigid add-on module, it is possible to configurate and design moment resisting joints of rolled and welded I-beams. The design is carried out according to the following standard:
- EN 1993-1-8:2010 (including National Annexes)
Three different types are available: rigid beam to column joint with end plate, rigid end plate connection as beam joint and rigid splice plate connection.
The design of the joints is carried out with the output of almost all necessary intermediate values and with graphical output of the corresponding component loadings so that the calculation can be always monitored and verified by the user.
All connections are displayed as 3D graphic with the output of all necessary dimensions of plates and angles including bolt hole arrangements. The graphics can be transferred to the printout report including dimension lines as well as descriptions of bolts and welds.
- Beam to Column joint category: connection possible as joint of the beam to the column flange as well as joint of the column to the girder flange
- Beam to Beam joint category: design of beam joints as both moment resisting end plate connections and rigid splice connection
- Automatic export of model and load data possible from RFEM or RSTAB
- Bolt sizes from M12 to M36 with the strength grades 4.6, 4.8, 5.6, 5.8, 6.8, 8.8 und 10.9 as long as the strength grades are available in the selected National Annex
- Almost any bolt spacing and edge distances (a check of the allowable distances is performed)
- Beam strengthening with tapers or stiffeners on the top and bottom surface
- End plate connection with and without overlap
- Connection with pure bending stress, pure normal force load (tension joint) or combination of normal force and bending possible
- Calculation of connection stiffnesses and check if a hinged, semi-rigid or rigid connection exists
End plate connection in a beam-column setup
- Joint beams or columns can be stiffened with tapers on one side or with stiffeners to one or both sides
- Wide range of possible stiffeners of the connection (e.g. complete or incomplete web stiffeners)
- Up to ten horizontal and four vertical bolts possible
- Connected object possible as constant or tapered I-section
- Ultimate limit state of the connected beam (such as shear or tension resistance of the web plate)
- Ultimate limit state of the end plate at the beam (e.g. T-stub under tensile stress)
- Ultimate limit state of the welds at the end plate
- Ultimate limit state of the column in the area of the connection (e.g. column flange under bending – T-stub)
- All designs are performed according to EN 1993-1-8 and EN 1993-1-1
Moment resisting end plate joint
- Two or four vertical and up to 10 horizontal bolt rows
- Joint beams can be stiffened with tapers on one side or with stiffeneres to one or both sides
- Connected objects are possible as constant or tapered I-sections
- Ultimate limit state of the connected beams (such as shear or tension resistance of the web plates)
- Ultimate limit state of the end plates at the beam (e.g. T-stub under tensile stress)
- Ultimate limit state of the welds at the end plates
- Ultimate limit state of the bolts in the end plate (combination of tension and shear)
Rigid splice plate connection
- For the flange plate connection, up to ten bolt rows one behind the other possible
- For the web plate connection, up to ten bolt rows possible each in vertical and horizontal direction
- Material of the cleat can be different from the one of the beams
- Ultimate limit state of the joint beams (e.g. net cross-section in the tension area)
- Ultimate limit state of the cleat plates (e.g. net cross-section under tensile stress)
- Ultimate limit state of the single bolts and the bolt groups (e.g. shear resistance design of the single bolt)
After starting the module, the joint group (rigid joints) is selected first, followed by joint category and joint type (rigid end plate connection or rigid splice plate connection). The nodes to be designed are then selected from the RFEM/RSTAB model. RF-/JOINTS Steel - Rigid automatically recognizes the joint members and determines from its location whether they are columns or beams. The user can intervene here.
If certain members are to be excluded from the calculation, they can be deactivated. Structurally similar connections can be designed for several nodes at the same time. The governing load cases, load combinations or result combinations have to be selected for the loading. Alternatively, you can enter the cross‑section and load data manually. The joint is configured step by step in the last input table.
The design is carried out according to EN 1993-1-8 and EN 1993-1-1. It is assumed that the internal forces are directly located in the defined node. In case of beam-column connections, additional eccentricities thus appear to the connection level which have to be considered in the calculation. Besides the design of the sufficient ultimate limit state of the connection, a calculation and classification of the connection with regard to stiffness is performed.
Result windows list details of all calculation results. Moreover, a 3D graphic is created where it is possible to show and hide single components as well as dimension lines and, for example, weld data.
The summary shows whether or not the individual designs have been fulfilled. In addition, the node number and the governing load case or the governing load/result combination are indicated.
When selecting a design, the module shows the detailed intermediate results including the actions and the additional internal forces from the connection geometry. Moreover, there is the option to display the results by load case and by node. The connections are represented in a realistic 3D rendering possible to scale. In addition to the main views, it is possible to show the graphics from any perspective.
You can add the graphics with dimensions and labels to the RFEM/RSTAB printout or export them as DXF. The printout report includes all input and result data prepared for test engineers. It is possible to export all tables to MS Excel or as a CSV file. A special transfer menu defines all specifications required for the export.
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