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001305
Daniel Dlubal, M.Sc.
2020-11-27
Steel Hall with Reinforced Concrete Columns
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The model represents a steel hall with concrete columns, supplemented by truss girders, truss rafters, steel trusses, and steel truss girders. It serves as a practical teaching example in the free online training “RFEM for Students | Part 3” (November 27, 2020 - German, November 30, 2020 - English). The linked image shows a detailed display of the steel structure, highlighting the connection between steel and concrete elements as well as the spatial structure.

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Steel Hall with Concrete Columns

Number of Nodes 48
Number of Lines 99
Number of Members 99
Number of Load Cases 7
Number of Load Combinations 88
Number of Result Combinations 4
Total Weight 88,380 t
Dimensions (Metric) 20.293 x 20.543 x 12.022 m
Dimensions (Imperial) 66.58 x 67.4 x 39.44 feet
Program Version 5.24.01

You can download this structural model to use it for training purposes or for your projects. However, we do not assume any guarantee or liability for the accuracy or completeness of the model.

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Models to Download
Knowledge Base Articles
Springs for Surface Foundation
A foundation is usually created in RFEM using the subgrade reaction modulus method. The reason for this is the relatively easy and straightforward manageability. Also, no iterative calculations are necessary and the computing time is relatively short. The subgrade reaction means that, for example, a foundation plate is loaded flat elastically.
Image 01 - Support Conditions for Surface Foundation
A previous article presented different variants of surface elastic foundations in addition to the traditional subgrade reaction modulus method. The following article describes another method for surface foundation. This method considers the adjacent ground areas by means of a foundation overlap. In this case, foundation parameters refer to the continuing works by Pasternak and Barwaschow.
Illustration of a method for performing stability analysis according to DIN EN 1992-1-1 in RFEM 6
For reinforced concrete components and structures whose structural behavior is significantly influenced by the second-order effects, Eurocode 2 provides the general method based on a nonlinear determination of internal forces according to the second-order analysis (5.8.6), as well as an approximation method based on the nominal curvature (5.8.8).

The aim of this technical article is to perform a design according to the general design method of Eurocode 2, using the example of a slender reinforced concrete column.
Modell eines Stahlbetonbalkens, der durch Kriechen und Schwinden beeinflusst wird
This technical article addresses the direct deformation analysis of reinforced concrete beams considering the long-term effects of creep and shrinkage. The direct calculation according to Eurocode 2 (EN 1992-1-1, Section 7.4.3) is explained using a single-span beam. Particular emphasis is placed on tension stiffening, behavior in the cracked state based on the distribution factor (damage parameter), and consideration of shrinkage and creep behavior.
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Product Features
Export RFEM or RSTAB Models to *.glb or *.glTF Format

RFEM and RSTAB models can be saved as 3D glTF models (*.glb and *.glTF formats). View the models in 3D in detail with a 3D viewer from Google or Babylon. Take your VR glasses, such as Oculus, to "walk" through the structure.

You can integrate the 3D glTF models into your own websites using JavaScript according to the instructions (as on the Dlubal website Models to Download): "Easily display interactive 3D models on the web & in AR" .

Activation of Camera Flight Mode in RFEM

With the Camera Fly Mode view option, you can fly through your RFEM and RSTAB structure. Control the direction and speed of the flight with your keyboard. Additionally, you can save the flight through your structure as a video.

Material model Anisotropic | Damage, nonlinear behavior, concrete and reinforced concrete

The "Nonlinear Material Behavior" add-on includes the Anistropic | Damage material model for concrete structural components. This material model allows you to consider concrete damage for members, surfaces, and solids.

You can define an individual stress-strain diagram via a table, use the parametric input to generate the stress-strain diagram, or use the predefined parameters from the standards. Furthermore, it is possible to consider the tension stiffening effect.

For the reinforcement, both nonlinear material models "Isotropic | Plastic (Members)" and "Isotropic | Nonlinear Elastic (Members)" are available.

It is possible to consider the long-term effects due to creep and shrinkage using the "Static Analysis | Creep & Shrinkage (Linear)" analysis type that has been recently released. Creep is taken into account by stretching the stress-strain diagram of the concrete using the factor (1+phi), and shrinkage is taken into account as the pre-strain of the concrete. More detailed time step analyses are possible using the "Time-Dependent Analysis (TDA)" add-on.

Feature 002918 | Determination of Required Longitudinal Reinforcement for Direct Crack Analysis

In the Concrete Design add-on, you can determine the required longitudinal reinforcement for the direct crack width analysis (w k).

Frequently Asked Questions (FAQ)
For the settlement calculation with the RF‑SOILIN add-on module, the specific weights gamma and gamma,sat are required for the soil. What do I need the value gamma,sat for, and how is it assumed in the calculation?
Is there a way to easily prevent RF‑SOILIN from recalculating the foundation every time the load in the governing load case is changed?

How can I check the determination of the required reinforcement?
I have created a model in which the ceiling slab is lined with ribs. When I assign a Rib member type to the boundary line of the surface and align it to the bottom edge of the surface, the boundary line is automatically pulled towards the center of gravity of the rib, that is, downwards under the slab. Is there a way to change this so that my lines still appear at the edge of the surface?
Is it possible to view the tangential and radial analysis results and reinforcement requirements rather than orthogonal for a circular slab?
How can I perform member design by case for different settings in the design configuration?
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