- More than 25,000 users in 71 countries
- One software package for all application areas
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- Proven software used in many well-known projects
Useful Program Features
Dlubal Software programs and add-on modules include a wide range of powerful features. In addition to product features, you can find here technical articles and application examples.
Furthermore, this overview provides you with several handy tips and tricks for your work with RFEM and RSTAB.
Why Dlubal Software?
Downstand Beams, Ribs, T-Beams: Shear Between Web and Flanges
In order to ensure the effects of panels, which should act as tensile or compression chords, it is necessary to connect them to the web in a shear-resistant manner. This connection is obtained in a similar way as the shear transfer in the joint between concreting sections by using the interaction between compressive struts and ties. In order to ensure the shear resistance, it must be verified that the compressive strut resistance is given and the tie force can be absorbed by the transverse reinforcement.
Determining Force Coefficient of Resulting Member Loads for Plane Lattice Structures from Wind Load
This article presents a simple example of a lattice structure to explain how to determine wind loading as a function of the lattice solidity.
Modelling Options for Composite Cross-Sections
In RFEM, there are different options to model composite cross‑sections. In the following example, three different modelling options for a composite cross‑section, consisting of a rolled steel section HEA 300 and a rectangular cross‑section made of concrete w/l = 100/30 cm will be displayed and explained.
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.
Nonlinear Analysis in RF-/CONCRETE
When designing reinforced concrete components according to EN 1992‑1‑1 , it is possible to use nonlinear calculation methods to determine internal forces for the ultimate limit state and the serviceability limit state. In this case, the internal forces and deformations are determined with respect to their nonlinear behaviour. The analysis of stresses and strains in cracked state usually provides the deflections, which clearly exceed the linearly determined values.
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.
Imperfections According to EN 1993-1-1 Clause 5.3.2: Bow Imperfection
According to EN 1993‑1‑1 , it is necessary to use the equivalent geometric imperfections with values that reflect the possible effects of all types of imperfections. EN 1993‑1‑1, Clause 5.3, specifies basic imperfections for the global analysis of frames as well as member imperfections.
Generating Wind Loads on Walls and Roofs According to ASCE/SEI 7-16
RFEM and RSTAB allow you to easily consider wind load effects on a three-dimensional building according to ASCE/SEI 7‑16 . This article explains the complex theory of entering wind loads in the software. You can find the wind load under 'Tools' → 'Generate Loads' → 'From Wind Loads'.
Cutting Pattern of Membranes and Cable Elements
Cable and tensile membrane structures are regarded as very slender and aesthetic building constructions. The partly very complex double-curved shapes can be found using suitable form-finding algorithms. A possible solution is, for example, to search the form via the equilibrium between the surface stress (provided prestress and an additional load such as self-weight, pressure, etc.) and the given boundary conditions.
RF-/STEEL AISC Mode Shapes
After running an analysis in RF-/STEEL AISC, the mode shapes for sets of members can be viewed graphically in a separate window. Select the relevant set of members in the result window and click the [Mode Shapes] button.
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