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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.

  • Working with RF-PIPING

    After activating the RF‑PIPING add‑on module, a new toolbar is available in RFEM and the project navigator and tables are extended. Piping modeling is performed in a similar way as members. Pipe bends are defined by using tangents (straight pipe sections) and bend radius at the same time. Thus, it is easy to subsequently change bend parameters.

    It is also possible to extend the piping subsequently by defining special components (expansion joints, valves, and others). The implemented libraries of structural components facilitate the definition.

    Continuous pipe sections are defined as sets of piping systems. For piping loads, member loads are assigned to the respective load cases. The combination of loads is included in piping load combinations and result combinations. After the calculation, you can display deformations, member internal forces and support forces graphically or in tables.

    Pipe stress analysis according to standards can then be performed in the RF‑PIPING Design add‑on module. You only need to select the relevant sets of piping systems and load situations.

  • 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
  • Features of RF-/STEEL Members

    • Cross-section optimization
    • Transfer of optimized cross-sections to RFEM/RSTAB
    • Design of any thin-walled cross-section from SHAPE-THIN
    • Representation of stress diagram on a cross-section
    • Determination of normal, shear, and equivalent stresses
    • Stress results of individual internal forces types
    • Detailed representation of stresses in all stress points
    • Determination of the maximum Δσ for each stress point (for fatigue design, for example)
    • Colored display of stresses and stress ratios facilitating quick overview of crucial or oversized zones
    • Parts list and quantity surveying
  • Features of RF-STEEL Surfaces (Available in RFEM Only)

    • Determine principal and basic stresses, membrane and shear stresses as well as equivalent stresses and equivalent membrane stresses
    • Stress analysis for structural surfaces including simple or complex shapes
    • Equivalent stresses calculated according to different approaches:
      • Shape modification hypothesis (von Mises)
      • Maximum shear stress criterion (Tresca)
      • Maximum principal stress criterion (Rankine)
      • Principal strain criterion (Bach)
    • Optional optimization of surface thicknesses and data transfer to RFEM
    • Serviceability limit state design by checking surface displacements
    • Detailed results of individual stress components and ratios in tables and graphics
    • Filter function for surfaces, lines, and nodes in tables
    • Transversal shear stresses according to Mindlin, Kirchhoff or user-defined specifications
    • Parts list of designed surfaces
  • RF-/STEEL | Input

    In order to facilitate the data input, there are surfaces, members, sets of members, materials, surface thicknesses, and cross-sections preset. It is possible to select the elements graphically using the [Select] function. The program provides access to the global material and cross-section libraries.

    Load cases, load combinations, and result combinations can be combined in various design cases.

    Combination of surface and member elements and separate designs allow you to model and analyze only the critical areas such as frame joints by surface elements. The other parts of the model can be designed by member analyses.

  • RF-/STEEL | Results

    After the calculation, the module displays the maximum stresses and stress ratios sorted by cross-section, member or surface, set of members, and x-location. In addition to the result values in tables, the corresponding cross-section graphic including stress points, stress diagrams, and values is displayed as well. The stress ratio can refer to any kind of stress type. The current location is highlighted in the RFEM/RSTAB model.

    In addition to the result evaluation in the module, it is possible to represent the stresses and stress ratios graphically in the RFEM/RSTAB work window. It is possible to individually adjust the colors and values.

    Result diagrams of a member or set of members facilitate targeted evaluation. Furthermore, you can open the respective dialog box of each design location to check the design-relevant cross-section properties and stress components of all stress points. It is possible to print the corresponding graphic including all design details.

  • Concrete stresses and rebar stresses

    SHAPE-MASSIVE | Reinforced Concrete Design

    • Stresses σ and strains ε of concrete and reinforcement without considering concrete tensile strength (cracked state)
    • Ultimate limit state design (existing safety) or design of defined internal forces
    • Location of the neutral axis α0, y0,N, z0,N
    • Curvatures ky, kz
    • Strain in neutral center ε0 and governing strains at compressive edge ε1 and at tensile edge ε2
    • Governing steel stress ε2s
  • SHAPE-THIN | Features

    • Modeling of the cross-section via elements, sections, arcs and point elements
    • Expandable library of material properties, yield strengths, and limit stresses
    • Section properties of open, closed or non-connected cross-sections
    • Effective properties of cross-sections consisting of different materials
    • Determination of weld stresses in fillet welds
    • Stress analysis including design of primary and secondary torsion
    • Check of c/t-ratios
    • Effective cross-sections according to
      • European Union EN 1993-1-5 (including stiffened buckling panels according to Section 4.5)
      • European Union EN 1993-1-3
      • European Union EN 1999-1-1
      • Germany DIN 18800-2
    • Classification according to
      • European Union EN 1993-1-1
      • European Union EN 1999-1-1
    • Interface with MS Excel to import and export tables
    • Printout report
  • SHAPE-THIN | Cross-Section Properties and Stresses

    SHAPE-THIN determines the section properties and stresses of any open, closed, built-up, or non-connected cross-sections.

    Cross-Section Properties
    • Cross-sectional area A
    • Shear areas Ay, Az, Au, and Av
    • Centroid position yS, zS
    • Moments of inertia Iy, Iz, Iyz, Iu, Iv, Ip, Ip,M
    • Radii of gyration iy, iz, iyz, iu, iv, ip, ip,M
    • Inclination of principal axes α
    • Cross-section weight G
    • Cross-section perimeter U
    • Torsional constants J, JSt.Venant, JBredt, Js
    • Location of the shear center yM, zM
    • Warping constants Iω,S, Iω,M or Iω,D for lateral restraint
    • Max/min section moduli Sy, Sz, Su, Sv, Sω,M with locations
    • Section ranges ru, rv, rM,u, rM,v
    • Reduction factor λM
    Plastic Cross-Section Properties
    • Axial force Npl,d
    • Shear forces Vpl,y,d, Vpl,z,d, Vpl,u,d, Vpl,v,d
    • Bending moments Mpl,y,d, Mpl,z,d, Mpl,u,d, Mpl,v,d
    • Section moduli Zy, Zz, Zu, Zv
    • Shear areas Apl,y, Apl,z, Apl,u, Apl,v
    • Position of area bisecting axes fu, fv
    • Display of the inertia ellipse
    Statical Moments
    • First moments of area Qu, Qv, Qy, Qz with location of maxima and specification of shear flow
    • Warping coordinates ωM
    • Warping areas Qω,M
    • Cell areas Am of closed cross-sections
    Stresses
    • Normal stresses σx due to axial force, bending moments and warping bimoment
    • Shear stresses τ due to shear forces as well as primary and secondary torsional moments
    • Equivalent stresses σeqv with customizable factor for shear stresses
    • Stress ratios, related to limit stresses
    • Stresses for element edges or center lines
    • Weld stresses in fillet welds
    Shear Wall Sections
    • Section properties of non-connected cross-sections (cores of high-rise buildings, composite sections)
    • Shear wall shear forces due to bending and torsion
    Plastic Design
    • Plastic capacity design with determination of the enlargement factor αpl
    • Check of the c/t-ratios following the design methods el-el, el-pl or pl-pl according to DIN 18800
  • SHAPE-THIN | Results

    All results can be evaluated numerically and graphically and displayed in a visualization. Selection functions facilitate the targeted evaluation.

    The printout report corresponds to the high standards of the FEA software RFEM and the frame analysis software RSTAB. Modifications are updated automatically.

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Do you have questions or need advice?
Contact our free e-mail, chat, or forum support or find various suggested solutions and useful tips on our FAQ page.

(267) 702-2815

info-us@dlubal.com

First Steps

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.