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  1. Graphical Display of Mode Shape in RF-/STEEL AISC

    Eigenvalue Solver for Member Design in RF-/STEEL AISC

    The determination of the critical buckling moment is carried out in RF-/STEEL AISC by using the eigenvalue solver which allows an exact determination of the critical buckling load.

    The eigenvalue solver is completed by a display window of the eigenvalue graphics which ensures the check of the boundary conditions.

  2. Module Window 1.1 General Data

    Input

    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 due to its location if they are columns or beams. The user can intervene here.

    If certain members are to be excluded from the calculation, they can be deactivated. Similarly designed joints can be analyzed simultaneously for several nodes. The governing load cases, load combinations or result combinations have to be selected for the loading. It is also possible to enter sections and loads manually. The joint is configured step by step in the last input table.

  3. Module Window 1.4 Geometry

    Design

    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.
  4. Module Window 3.1 Designs - Summary

    Results

    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.

  5. Features

    General
    • 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
    • Designs:
      • 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 ten horizontal bolt rows possible
    • 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
    • Designs:
      • 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
    • Designs:
      • 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)
  6. RF-/JOINTS Timber - Timber to Timber | Features

    • Design of hinged connections
    • Biaxial inclination of the connected member (for example a jack rafter joint)
    • Connection of any number of members on one node for the ‘Main member only’ type
    • Screw diameter of 6 mm – 12 mm
    • Automatic check of the minimum distance between screws
    • Optional free definition of screw distances
    • Transfer of eccentricity from RFEM/RSTAB
    • Crosswise or parallel screw alignment
    • Definition of up to 16 screws in a row
    • Graphical visualization of joints in the add-on module and in RFEM/RSTAB
    • Possibility to perform all required designs
  7. Window 1.1 General Data

    RF-/JOINTS Timber - Timber to Timber | Input

    First, it is necessary to select the joint type and the design standard.

    The connected members are imported from the RFEM/RSTAB model. The module automatically checks if all geometric conditions are fulfilled.

    Also the loads are imported automatically from RFEM/RSTAB. In the Geometry window, you can specify the screw parameters (diameter, length, angle, etc.).

  8. RF-/DYNAM Pro - Nonlinear Time History | Features

    • User-defined time diagrams as a function of time, in a tabular form, or as harmonic loads
    • Combination of the time diagrams with RFEM/RSTAB load cases or combinations (enables definition of nodal, member and surface loads as well as free and generated loads varying over time)
    • Combination of several independent excitation functions
    • Nonlinear time history analysis with the implicit Newmark analysis (RFEM only) or the explicit analysis
    • Structural damping using Raleigh damping coefficients or Lehr's damping
    • Direct import of initial deformations from a load case or combination (RFEM only)
    • Stiffness modifications as initial conditions, for example axial force effect, deactivated members (RSTAB only)
    • Graphical display of results in a time course monitor
    • Export of results in user-defined time steps or as an envelope
  9. RF-/DYNAM Pro - Nonlinear Time History | Nonlinearities

    • Nonlinear member types, such as tension and compression members or cables
    • Member nonlinearities, such as failure, tearing, yielding under tension or compression
    • Support nonlinearities, such as failure, friction, diagram, and partial activity
    • Release nonlinearities, such as friction, partial activity, diagram, and fixed if positive or negative internal forces
  10. RF-/STEEL | Features

    • General stress analysis
    • Automatic import of internal forces from RFEM/RSTAB
    • Complete graphical and numerical results of stresses and stress ratios integrated in RFEM/RSTAB
    • Various options to adjust graphical results for evaluation
    • Flexible design in multiple design cases
    • Clearly arranged result tables for quick overview available immediately after design
    • High efficiency due to the minimum of data required for input
    • Flexibility due to detailed settings of parameters and extent of calculation

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First steps

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