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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.

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  1. Figure 01 - Loading of Lower Flange by Wheel Loads

    Design for the Lower Flange of Suspension Cranes According to DIN EN 1993-6

    For suspension cranes, the bottom chord of the runway girder is subjected to local flange bending due to the wheel loads in addition to the main load bearing capacity. The bottom chord behaves like a slab due to these local bending stresses and has a biaxial stress condition [1].
  2. Design of Web Fillet Welds of Crane Girders According to EN 1993-6

    Finally, the topic about the design of welds at crane runway beams is followed by a contribution to the design of leaflet seams, after the contributions to the rail weld in the ultimate limit state and in the limit state of fatigue . The program should consider both the ultimate limit state and the limit state of fatigue.

  3. Creating Parametric Cross-Section

    The stand-alone program SHAPE‑THIN determines characteristic values and stresses of any thin‑walled cross‑sections. Graphic tools and features allow for modelling complex cross‑section shapes. In addition to the graphical input, it is also possible to enter the data in tables. As an alternative, you can import a DXF file and use it as a basis for further modelling. Also, each cross‑section can be entered using the cross‑section library of Dlubal Software and combined as a part with the user-defined elements.

  4. Redistributing Shear Stresses from Null Elements

    SHAPE-THIN allows you to calculate section properties and stresses of any cross‑sections. If a flange or a web is weakened by bolt holes, you can consider this by using null elements. The stresses are subsequently recalculated with the reduced cross‑section values. In this case, it is necessary to pay special attention to shear stresses. By default, these are set to zero in the area of the null elements. When recalculating shear stresses with the reduced cross‑section values and without further adaptation, it turns out that the integral of the shear stresses is no longer equal to the applied shear force. The following example shows in detail how to calculate the shear stress.

  5. Design of Fillet Welds According to EN 1993-1-8

    A fillet weld is the most common weld type in steel building construction. According to EN 1993‑1‑8, 4.3.2.1 (1) [1], fillet welds may be used for connecting structural parts where the fusion faces form an angle between 60° and 120°.

  6. Fatigue Limit State Design of Rail Welds of Crane Girders According to EN 1993-6

    Based on the technical article about the ultimate limit state design of rail welds, the following explanation refers to the process of fatigue design of rail welds. In particular, this article explains in detail the effects of considering the eccentric wheel load of 1/4 of the rail head width.

  7. Modeling Corners

    With the cross-section program SHAPE-THIN you can accurately model the corner zones of sections:

    • The function "Smooth Corner" fills the corner with an element and connects it automatically with a Null element. To do this, click only the corner zone.
    • Use the function "Create Round or Angled Corner" to round or angled the corner. Enter the Fillet radius and click both elements.
  8. Cross-Section Information of Section Areas

    The cross‑section properties software SHAPE‑THIN provides the option to combine the cross‑section parts in a “section” and display the cross‑section properties. Thus, it is possible to determine the values of the individual components in a composite cross‑section.

  9. Consideration of Eccentric Wheel Load Application for Weld Design at ULS

    The eccentric wheel load application of 1/4 of the rail head width has to be considered only for the fatigue design from damage class S3 according to DIN EN 1993‑6. An additional input option in detail settings allows you to consider this eccentricity for the fatigue design at the ultimate limit state as well. By selecting this option, the design with the eccentric load applied is always considered without regard to the damage class.

  10. Curved Cross-Section Parts

    In addition to arcs and circles, you can model the following curved cross-section parts in SHAPEK 8.xx:

    • Ellipsis
    • Elliptical arcs
    • Parabolas
    • Hyperbola
    • Splines
    • NURBS ( non-uniformly rational B-spline )

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