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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. Streamline Diagram

    Wind Load on Rectangular, Rounded Structural Components

    The wind load of rectangularly rounded structural components is a complex matter. The equivalent forces from wind load depend on the strength of the circulating wind load and the component geometry.

  2. Properties and calculation of result values of line supports

    When evaluating line support forces, implausible diagrams sometimes arise at first glance. In particular, for variable loads at locations that also have a nodal support, at division points and edge locations of supported lines, the results show sometimes unexpected support reactions. Using the function of the linear smooth distribution in the Project Navigator - Display does not always lead to the expected result diagram.

  3. Comparison of Results

    Effect of Different Ways to Model Line Supports in Glass Structures

    Due to the special properties of glass, you also have to pay close attention to detail points when modeling in an FE model. Glass has a very high compressive strength and is therefore generally only designed for its tensile stresses. A particular disadvantage of the material is its brittleness. Stress peaks that occur in the calculation must therefore not be readily neglected.

  4. Required Reinforcement for the Rib and Axial Force Distribution of the Wall

    Modeling and Determining Internal Forces for a T-Beam with Masonry Wall Above

    When modeling a reinforced concrete rib with a masonry wall above, there is the risk that the rib is underdesigned if the structural behavior of the masonry is not correctly considered and the connection between masonry wall and downstand beam is not modeled sufficiently accurate. This article deals with this issue and shows possible modeling options of such a structure. In this example, the reinforcement is determined only from the internal forces and without any secondary minimum reinforcement.

  5. Load Distribution on the Surface for the Governing CO

    Surface Load Inside the Critical Perimeter in RF-PUNCH Pro

    RF-PUNCH Pro performs the punching shear design on concentrated load application locations (column connection, nodal support and nodal load) as well as on wall ends and wall corners.

  6. Example

    Smoothing of surface internal forces in RFEM

    When calculating a surface model, the internal forces are determined separately for each finite element. Since the element-by-element results usually represent a discontinuous distribution, RFEM performs a so-called smoothing of the internal forces that takes into account the influence of neighboring elements. In this method, the discontinuous distribution of internal forces is adjusted. The evaluation of the results is thus clearer and easier.

  7. Modeling Overlapping Surfaces: Risks and Approaches

    When modeling with finite elements, you sooner or later come up with the question of how two surfaces (2D elements) lying on top of each other can be modeled. Hence, both surfaces are quite often modeled in the same plane. The possible consequences of this approach and whether there are better solutions are described below.

  8. RFEM model

    Timber Beam Design per the 2014 CSA Standard

    Using the RF-TIMBER CSA module, timber beam design is possible according to the CSA O86-14 standard. Accurately calculating timber member bending resistance and adjustment factors is important for safety considerations and design. The following article will verify the factored bending moment resistance in the RFEM add-on module RF-TIMBER CSA using step-by-step analytical equations per the CSA O86-14 standard including the bending modification factors, factored bending moment resistance, and final design ratio.

  9. Evaluating the First Mode Shape

    Determining Seismic Loads per Storey by Means of Nodal Constraints

    When introducing and transferring horizontal loads such as wind or seismic loads, there are increasing difficulties in 3D models. To avoid such issues, some standards (for example ASCE 7, NBC) require the simplification of the model by using diaphragms that distribute the horizontal loads to structural components transferring loads, but cannot transfer bending themselves (called "Diaphragm").

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