- More than 45,000 users in 95 countries
- One software package for all application areas
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- Short learning time and intuitive handling
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- Flexible modular concept, extensible according to your needs
- Scalable license system with single and network licenses
- Proven software used in many well-known projects
Why Dlubal Software?
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.
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. Due to these local bending stresses, the bottom chord behaves like a plate and has a biaxial stress state .
At the end of the topic on the design of welds on runway beams now follows - after the technical articles about the rail weld seam in the ultimate limit state and the limit state of fatigue - a technical article about web fillet welds. Both the ultimate limit state and the fatigue limit state are considered.
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.
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.
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.
With the cross-section program SHAPE-THIN, you can model the corner areas of cross-sections in detail:
- The "Smooth Corner" function fills the corner with an element and automatically connects it with a null element. To do this, simply click the corner area.
- Use the "Create Round or Angled Corner" function to round or angle the corner. To do this, specify the fillet radius and click both elements.
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.
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.
In addition to arcs and circles, the following curved cross-section parts can be modeled in SHAPE-THIN 8.xx:
- Elliptical arcs
- NURBS (non-uniform rational B-Spline)
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