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  1. Biaxial Load Eccentricities in Cross-Section

    Designing Reinforced Concrete Compression Elements Subjected to Biaxial Bending with the Nominal Curvature Method

    Daily tasks in reinforced concrete design also include designing compression elements subjected to biaxial bending. The following article describes the different methods according to Chapter 5.8.9, EN 1992-1-1, which can be used to design compression elements with biaxial load eccentricities by means of the nominal curvature method according to 5.8.8.

  2. Figure 01 - Settings for the Deformation Analysis with RF-CONCRETE Deflect

    Distribution Coefficient ζ in the Deformation Analysis of Reinforced Concrete Components

    Performing serviceability limit state design also includes taking into account the allowable deformation. The calculation of the deformation of reinforced concrete components depends on whether or not the observed cross-section is cracking under the applied loading. The governing control parameter in RF-CONCRETE Deflect is the distribution coefficient ζ.
  3. Creep and Relaxation

    Definition of Stress Losses From Relaxation for Prestressed Concrete Design

    When designing prestressed concrete components, the time-dependent stress losses from creeping, shrinkage and relaxation have to be considered. The consideration of relaxation losses when designing prestressed concrete in RF-TENDON and RF-TENDON Design is discussed in detail in the following.
  4. Figure 01 - RFEM Model of Residential Building with Prestressed Concrete Ceiling

    Prestressed Concrete Design in RFEM

    Efficient design of prestressed structural components requires a few additional steps that go beyond the standard reinforced concrete design, from modelling tendons, to the calculation of equivalent loads, to the cross-section resistance design. Therefore, it is important that the software for prestressed concrete design is structured and the navigation is possible in the program. RFEM with two add-on modules RF-TENDON and RF-TENDON Design fulfils these requirements and allows engineers to carry out the complete design of prestressed beams, frames, plates, buildings and bridges according to EN 1992-1-1 with National Annexes and SIA 262.

  5. Figure 01 - Curtailment of Longitudinal Reinforcement from [1]

    Displaying Curtailment of Longitudinal Reinforcement and Reinforcement Covering Line

    In the case of a huge amount of reinforcement, it might be useful to grade the longitudinal reinforcement of a beam. The grading corresponds to the tensile force distribution. Using RF-CONCRETE Members and CONCRETE, you can specify the curtailment of the reinforcement, which is considered in the automatically proposed reinforcement for the longitudinal reinforcement. When determining this reinforcement proposal, it is necessary to ensure that the envelope of the acting tensile force can be absorbed.

  6. Figure 01 - Structural System of Schöck Isokorb® type K from [1]

    Considering Schöck Isokorb® in FEM Calculation of RFEM

    Heat loss due to external components without thermal decoupling of the internal components is enormous. For this reason, external structural components are thermally separated from the building envelope by using a special built-in component. For the connection of a balcony slab with a reinforced concrete floor, Schöck Isokorb® or HALFEN HIT Insulated Connection can be used, for example. For the design of such built-in components, the respective technical approval must be taken into account. The following article shows an example with Schöck Isokorb® in the FEM calculation.

  7. 1 - Time-Dependent Settlement Components [2]

    Settlement Calculation of Single Foundations According to DIN 4019 in RF-/FOUNDATION Pro

    For the serviceability limit state design according to Section 6.6 of Eurocode EN 1997-1, settlement has to be calculated for spread foundations. RF-/FOUNDATION Pro allows you to perform the settlement calculation for a single foundation. For this, you can select between elastic or solid foundation. By defining a soil profile, it is possible to consider several soil layers under the foundation base. The results of the settlement, foundation tilting, and vertical soil contact stress distribution are displayed graphically and in tables to provide a quick and clear overview of the calculation performed. In addition to the design of the foundation settlement in RF-/FOUNDATION Pro, the structural analysis determines the representative spring constants for the support and can be exported to the structural model of RFEM or RSTAB.

  8. Show Isoline Labels Shifted

    Show Isoline Labels Shifted

    In the case of very small distances between isolines, the labels often overlap, which makes the result documentation difficult. As of the RFEM version 5.06, it is possible to select shifted arrangement of the isoline labels in the Display Properties dialog box. By selecting the ‘Show values shifted’ option, you can easily avoid overlapping the result values in many cases.

  9. Improved Result Output for Nonlinear Reinforced Concrete Design

    Improved Result Output for Nonlinear Reinforced Concrete Design

    As of RFEM 5.6.1103 and RSTAB 8.6.1103, there is an improved result output for nonlinear calculation of reinforced concrete design in RF‑CONCRETE Members and CONCRETE. The new result windows include tables with a wide range of loading results, for example governing load with the maximum ratio. In addition, it is now also possible to display the envelope results for the maximum ratio graphically.

  10. Defining Free Dimension in RFEM

    Defining Free Dimension

    In order to set a dimension in RFEM, it is required that a physical node exists at the locations to be dimensioned. Therefore, dimensioning free surface loads or graphical results was not possible without further effort until now.

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