- 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
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.
When designing prestressed concrete components, the time-dependent stress losses from creeping, shrinkage and relaxation have to be considered. The consideration of relaxation losses when designing prestressed concrete in RF-TENDON and RF-TENDON Design is discussed in detail in the following.
Efficient design of prestressed structural components requires a few additional steps that go beyond the standard reinforced concrete design, from modelling tendons, to the calculation of equivalent loads, to the cross-section resistance design. Therefore, it is important that the software for prestressed concrete design is structured and the navigation is possible in the program. RFEM with two add-on modules RF-TENDON and RF-TENDON Design fulfils these requirements and allows engineers to carry out the complete design of prestressed beams, frames, plates, buildings and bridges according to EN 1992-1-1 with National Annexes and SIA 262.
As of the program version RFEM 5.06, it is possible to edit several tendons in the RF‑TENDON add‑on module at the same time. For this, it is necessary to select the corresponding tendons in the table of tendon arrangement.
In RF-TENDON, it is possible to import tendon geometry from a DXF file. Thus, you can basically use any tendon geometry.
The equivalent loads determined in RF‑TENDON due to prestress are transferred in RFEM as member loads or as line loads. A member load is used for member types with their own stiffness, a line load is used for member types without their own stiffness. In order to understand which values of the concentrated loads are to be transferred from RF‑TENDON to RFEM, you should do the following display settings:
~ Loads reference to the global coordinate system (GCS)
~ Load display: "Point"
In RF‑TENDON and RF‑TENDON Design, you can review and adjust the code‑dependent factors, calculation parameters and calculation methods using the “Code” button. You can display the setting and adjustment options according to a chapter of a code, selecting the “Grouping” option in the dialog box.
Once you have determined the final tendon geometry in RF‑TENDON, exporting the model to a CAD program can be useful. For this purpose, the module includes the option to export the file in the .dxf file format. You can select the export function by right-clicking the workspace. After selecting the DXF-file format and a location, you can do some additional settings, for example the following:
Precast prestressed hollow core slabs consist of composite, uniaxially stressed non‑solid slabs with a width of about 1.20 m. These elements are prestressed with pre-tension in a precast concrete plant. The precasting is usually done with slipformers. Due to the lesser self‑weight of the non‑solid slab and the existing prestress, these precast prestressed hollow core slabs show a lesser deflection than loosly reinforced slabs made of solid concrete.
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