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  • More than 45,000 users in 95 countries
  • One software package for all application areas
  • Free support provided by experienced engineers
  • Short learning time and intuitive handling
  • Excellent price/performance ratio
  • Flexible modular concept, extensible according to your needs
  • Scalable license system with single and network licenses
  • Proven software used in many well-known projects


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Wind Simulation & Wind Load Generation

With the stand-alone program RWIND Simulation, wind flows around simple or complex structures can be simulated by means of a digital wind tunnel.

The generated wind loads acting on these objects can be imported to RFEM or RSTAB.

  • Effective Cross-Section of a Cold-Formed Z-Section in SHAPE-THIN 9

    SHAPE-THIN | Cold-Formed Sections

    SHAPE-THIN determines the effective cross-sections according to EN 1993-1-3 and EN 1993-1-5 for cold-formed sections. You can optionally check the geometric conditions for the applicability of the standard specified in EN 1993‑1‑3, Section 5.2.

    The effects of local plate buckling are considered according to the method of reduced widths and the possible buckling of stiffeners (instability) is considered for stiffened sections according to EN 1993-1-3, Section 5.5.

    As an option, you can perform an iterative calculation to optimize the effective cross-section.

    You can display the effective cross-sections graphically.

    Read more about designing cold-formed sections with SHAPE-THIN and RF-/STEEL Cold-Formed Sections in this technical article: Design of a Thin-Walled, Cold-Formed C-Section According to EN 1993-1-3.

  • Graphical Output of Response

    CADS Footfall Analysis | Solution

    There is a known complexity of calculating footfall response on irregular floors or staircases of any type. Footfall Analysis uses the RFEM model and the modal analysis results of RF-DYNAM Pro - Natural Vibrations to predict the vibration levels at all locations on a floor. A rigorous analysis method is essential to enable an accurate investigation of the dynamic behavior of the floor.

    The software incorporates the most up to date analysis procedures allowing the user to select between the two most used calculation methods available, namely the Concrete Centre Method (CCIP-016) and the Steel Construction Institute Method (P354).

  • Analysis Input

    CADS Footfall Analysis | Features

    • Footfall Analysis links with RFEM, using its model geometry, so that the user is not required to create a second model specifically for footfall analysis
    • Allows the user to analyze any type of structure for footfall analysis, irrespective of the shape, material or use
    • Quick and accurate predictions of resonant and impulsive (transient) responses
    • Cumulative measurement of vibration levels – VDV analysis
    • Intuitive output enabling the engineer to improve critical areas in a cost-effective way
    • Pass/fail limit check in accordance with BS 6472 and ISO 10137
    • Available excitation forces: CCIP-016, SCI P354, AISC DG11 for floors and stairs
    • Frequency weighting curves (BS 6841)
    • Quick investigation for full model or specific areas
    • Vibration Dose Analysis (VDV)
    • Adjusting the minimum and maximum walking frequency as well as the walker’s weight
    • User-defined input damping values
    • Varying the number of footfalls for resonant response, user input or software calculated
    • Environmental response limit based on BS 6472 and ISO 10137
  • Eigenmode mass participation graph

    CADS Footfall Analysis | Output

    • Overall maximum response factors and critical nodes
    • Resonant analysis (maximum response factor, RMS acceleration, critical node, critical frequency)
    • Impulsive (transient) analysis (maximum response factor, peak acceleration/velocity, RMS acceleration/velocity, critical node, critical frequency)
    • Vibration dose values for both resonant and impulsive analyses

    • Response factor vs walking frequency
    • Mass participation vs eigenmodes
    • Velocity time history
  • Warping Torsion Analysis in RF-/STEEL AISC

    Due to the integrated RF-/STEEL Warping Torsion module extension, it is possible to perform the design according to Design Guide 9 in RF-/STEEL AISC.

    The calculation is performed with 7 degrees of freedom according to the warping torsion theory and enables a realistic stability design including consideration of torsion.

  • 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 shows a display window of the eigenvalue graphics which enables check of the boundary conditions.

  • Consideration of Lateral Intermediate Supports in RF-/STEEL AISC

    In STEEL AISC, it is possible to consider lateral intermediate supports at any location. For example, it is possible to stabilize only the upper flange.

    Furthermore, user-defined lateral intermediate supports can be assigned, for example single rotational springs and translational springs at any location at the cross-section.

  • RF-/JOINTS Steel - Rigid | 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 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.

  • RF-/JOINTS Steel - Rigid | 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.
  • 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.

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First steps

We provide hints and tips to help you get started with the main programs RFEM and RSTAB.

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Knowledge Base

In addition to our technical support (e.g. via chat), you’ll find resources on our website that may help you with your design using Dlubal Software.