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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. Stiffened Frame

    Simulation of a Stiffening Pane in RSTAB

    The modeling of planar structural components such as glass panes is generally only possible in RFEM. If it is necessary to define the stiffening effect of a pane in a particular case, it can also be simulated in RSTAB.

  2. Load Transfer with Intermediate Ceiling

    Determining the Contact Force Between Two Inclined Objects

    This article describes how to determine the contact force between two objects behaving like walls that are inclined at a certain angle on top of each other. To determine this contact force, define a nodal release. Since a nodal release requires certain conditions, this article shows two examples.

  3. Modeling Option 1 and 2 Without Member Elastic Foundation

    Options for Modeling Bored Piles

    RFEM and RSTAB offer different options to model bored piles. One option is to display bored piles as single-valued supports or hinged columns. Another option is the realistic modeling while taking into account the soil by means of applying a member elastic foundation. The two following examples will describe it in detail. However, pile base resistance, skin friction and soil layers are not considered in this technical article.

  4. Figure 01 - Original Structure

    Consideration of Possible Contact Between Overlapping Members

    From time to time it happens that two intersecting beams overlap at a short distance.
  5. System and loads

    Modeling 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 modeling will be explained and the shear forces of the bolts will be compared to the corresponding results from RF-JOINTS Steel - Pinned.
  6. Structure

    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.

  7. DXF Export of Connection Geometry of RF-/JOINTS

    DXF Export of Connection Geometry

    Since the last update of RFEM/RSTAB, you can export the entire connection geometry in the DXF file format from RF‑/JOINTS. This is possible for all connection groups, both steel and timber. You can start the export in the ‘Results - Graphic’ window by clicking the new button below the graphics window.

  8. 1 - System and Loading

    Design of Tapered Single-Span Beam According to Eurocode 3

    In the following, a single-span beam subjected to bending and compression will be designed by means of the RF-/STEEL EC3 add-on module according to EN 1993-1-1. Since the beam is designed as a tapered cross-section and does not represent a uniform structural component, the design must be performed either according to the General Method according to clause 6.3.4 of EN 1993-1-1 or the second-order analysis. Both options will be analyzed and compared, whereby an additional design by partial internal forces is available for the calculation according to the second-order analysis. From this, the design is divided into three steps:

    1. Design according to clause 6.3.4 of EN 1993-1-1 (General Method)
    2. Design According to Second-Order Analysis, Elastic (Warping Torsion Analysis)
    3. Design According to Second-Order Analysis, Plastic (Warping Torsion Analysis and Partial Internal Forces Method)
  9. 1 - Complete Model

    Comparison of Plastic Design (Shell Model) and Nonlinear Member Model

    The following example presents a comparison between a shell model and a simple member model performed in RFEM. In the case of the shell model, a beam is suspended within surfaces and modelled with restraints on both sides due to the boundary conditions. This is a statically indeterminate system that will form plastic hinges when overloaded. The comparison is carried out on a member model, which has the same boundary conditions as the shell model.

  10. Consideration of Initial Slippage in RF-JOINTS Timber - Steel to Timber

    Consideration of Initial Slippage

    In RF-JOINTS Timber - Steel to Timber, it is possible to consider the possible minimum slippage of bolts in the case of guide pins. In RFEM, this slippage is taken into account using the flexibility in member end releases.

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First steps

We provide hints and tips to help you get started with the main programs RFEM and RSTAB.

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