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  1. Figure 01 - Stress-Strain Diagram of Steel (Source: [1])

    Hardening Parameters in Nonlinear Material Models

    Strain hardening is the material ability to reach a higher stiffness by redistributing (stretching) microcrystals in the crystal lattice of the structure. A distinction is made between the material isotropic hardening as scalar quantities or tensorial kinematic hardening.

  2. Figure 01 - Activating Ground Water Level for Soil Profile

    Influence of Ground Water Level on Design in RF-/FOUNDATION Pro

    Using RF-/FOUNDATION Pro, it is possible to perform geotechnical design according to EN 1997‑1 [1] for single foundations. Subsequently, the program displays detailed information about the influence of the ground water level on the selected design according to EN 1997‑1.

  3. Figure 01 - Structural System

    COM interface in VBA | 4.2 Frame Optimization

    Part 4.1 of this article series described the connection of the RF‑/STEEL EC3 add‑on module and the members and load combinations to be designed were already defined. This part will focus on the optimization of cross‑sections in the module and the transfer to RFEM. The elements already explained in the previous parts are not described again.

  4. Figure 01 - Cross-Section

    Design and Stabilization of Beams Susceptible to Lateral-Torsional Buckling According to Eurocode 3 and AISC

    A single-span beam with lateral and torsional restraint is to be designed according to the recommendations of Eurocode 3 and AISC. If the beam does not reach the required load-bearing capacity, it must be stabilized.

  5. Figure 01 - Frame Joint in RF-/FRAME-JOINT Pro

    Analysis of Load-Bearing Capacity of Bolted Frame Joints According to EC 3-1-8

    When designing bending-resistant connections from I-beams, the connection is dissolved into the individual parts. For these basic components of a joint, there are separate formula calculators for load-bearing capacity and stiffness. In RFEM and RSTAB, it is possible to design frame joints using the RF-/FRAME-JOINT Pro add-on module.

  6. Figure 01 - Section Factor Am/V for Unprotected Steel Components (Source: [5])

    Structural Fire Design According to EN 1993-1-2 (Heating Behaviour)

    Using RF-/STEEL EC3, you can apply nominal temperature-time curves in RFEM or RSTAB. For this, the standard time-temperature curve (ETK), the external fire curve, and the hydrocarbon fire curve are implemented in the program. Based on these diagrams, the add‑on module can calculate the temperature in the steel cross‑section and thus perform the fire design. This article explains the behaviour of protected and unprotected steel cross‑sections.

  7. Figure 01 - Failure if Negative PX'

    Explanation of Support Nonlinearities on Example 1.1 | Translation

    In practice, an engineer often faces the task of representing the support conditions as close to reality as possible in order to be able to analyse deformations and internal forces of the structure subjected to their influence and to enable as much cost‑efficient construction as possible. RFEM and RSTAB provide numerous options for defining nonlinear nodal supports. The first part of my article describes the options for creating a nonlinear free support and provides a simple example. For better understanding, the result is always compared to a linearly defined support.

  8. Figure 01 - Comparison of Coordination View with Structural Analysis View

    BIM Workflow: Data Exchange Using IFC Files

    In the BIM workflow, IFC files are frequently used as the basis for data exchange between CAD and structural engineering software. However, there is a fundamental problem with this approach. This article explains various types of IFC files, and provides an overview of the import and export options in the Dlubal Software programs.

  9. Local Buckling of Members per the ADM 2015

    Local Buckling of Members per the ADM 2015

    If an aluminium member section is comprised of slender elements, failure can occur due to the local buckling of the flanges or webs before the member can reach full strength. In the add-on module RF-/ALUMINUM ADM, there are now three options for determining the nominal flexural strength for the limit state of local buckling, Mnlb, from section F.3 in the 2015 Aluminum Design Manual. The three options include sections F.3.1 Weighted Average Method, F.3.2 Direct Strength Method, and F.3.3 Limiting Element Method.

  10. Figure 01 - Model 1

    Methods of Supporting Plates by Columns

    In the case of plate structures, it is always necessary to consider the realistic definition support conditions. Depending on the way of defining the flexibility of the supports, clear differences may occur in the results.

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