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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. Figure 01 - Structure

    Design of Big Openings in Beams and Downstand Beams

    Since the ultimate limit state of beams in the area of openings is affected, particular attention should be payed to this. In general, small openings can be sufficiently covered by adapting the beam structure to the openings. For big openings, it is necessary to consider and model the area separately.
  3. Consideration of the Correlation with Wind Loads

    If the wind load for buildings or structures is to be determined by the simultaneous assumption of aerodynamic pressure and suction coefficients on the windward and leeward sides of the building, the correlation of the wind pressure on zones D and E of the wall surfaces may be taken into account.
  4. Figure 01 - Structure and Loading

    Modelling and Design of Pinned End Plate Connection

    RFEM offers the following possibilities to design a pinned end plate connection. Firstly, there is the possibility in RF-JOINTS Steel - Pinned to enter the corresponding parameters quickly and easily to receive a documented analysis including graphics. It is also possible to model such a connection individually in RFEM and then to evaluate or manually design the results. In the following example, the particularities of this modelling will be explained and the shear forces of the bolts will be compared to the corresponding results from RF-JOINTS Steel - Pinned.
  5. Figure 01 - Integrate Dlubal RFEM Type Library

    COM Interface in VBA | 5. Creating a Tool to Copy and Move Guidelines

    RF-COM/RS-COM is a programmable interface which allows the user to expand the main programmes RFEM and RSTAB by customized input macros or post‑processing programmes. In this article, a tool to...

  6. Modeling of Tower with Block Manager

    Lattice towers represent typical applications in steel construction. Examples for this special type of truss structures are antenna and overhead line towers, or columns for wind power stations, cable cars, and supporting frame constructions. The modelling can be done individually in RFEM and RSTAB by entering various tower elements. Furthermore, you can use different copy functions and parameterized input options. However, this procedure normally requires considerable effort. It is more comfortable to model such structures using pre-fabricated catalogue elements provided by the Block Manager. Those elements are automatically stored in the database during program installation. Thus, you can use tower segments, platforms, antenna brackets, cable ducts et cetera as parameterized building blocks for generating diverse tower structures.
  7. Figure 01 - System

    Pipes Under Internal Pressure Load

    Pipe systems are exposed to a large number of loadings. Internal pressure is one of the most governing loads. Therefore, this article describes the stresses and deformations resulting from a pure internal pressure load in the pipe's wall and for the pipe respectively.

  8. Figure 01 - System

    Lateral Torsional Buckling of a Principal Beam with I-Section According to EN 1993-1-1

    This example is described in technical literature [1] as example 9.5 and in [2] as example 8.5. A lateral-torsional buckling analysis must be performed for a principal beam. This beam is a uniform structural member. Therefore, the stability analysis can be carried out according to clause 6.3.3 of DIN EN 1993-1-1. Due to the uniaxial bending, it would also be possible to perform the design by the general method according to clause 6.3.4. Additionally, the determination of the moment Mcr is validated with an idealised member model in line with the method mentioned above, using a FEM model.

  9. Figure 01 - Spectral Acceleration Sa [m/s²] Versus Natural Frequency f [Hz] of Narrow-Band Response Spectrum According to EN 1998-1 [1]

    ZPA Method in Response Spectrum Analysis

    In a multi-modal response spectrum analysis, it is important to determine a sufficient number of eigenvalues of the structure and to consider their dynamic responses. Regulations such as EN 1998-1 [1] and other international standards require to activate 90 % of the structural mass. This means: to determine as many eigenvalues that the sum of the effective modal mass factor is greater 0.9.

  10. Figure 01 - Model of Steel Shell Structure

    Plate Buckling Analysis of Steel Shell Structures Using MNA/LBA Concept

    Shell buckling is considered to be the most recent and least explored stability issue of structural engineering. This is less due to a lack of research activities, but rather due to the complexity of the theory. With the introduction and further development of the finite element method in structural engineering practice, some engineers no longer have to deal with the complicated theory of shell buckling. Evidence of the problems and errors to which this gives rise is very well summarized in [1].

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