Stability Design of Reinforced Concrete Compression Elements

Concrete Design

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Concrete Design for RFEM 6 | Columns

The Concrete Design add-on allows you to easily design reinforced concrete compression elements by using the standards-based equivalent member method, such as the nominal curvature method. The program calculates rectangular or circular cross-sections for you. Please note the normative specifications regarding the consideration of deformations for the structural components subjected to compression (second-order analysis).

If you want to avoid complex nonlinear calculations, the program provides you with an option to determine the internal forces affected by deformation in a simplified way using "model columns". In this case, the selected members are transferred into such model columns according to user-defined specifications.

The add-on for RFEM and RSTAB allows for design checks of members, member sets, and surfaces (only in RFEM). Display of a staircase with a center support and integrated upper and lower landing surfaces.

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Stability Design of Reinforced Concrete Compression Elements

Total items: 3

Visualization of a sewer structure using RFEM for reinforced concrete members and surfaces.

Concrete Design | Columns | Features

Automatic import of internal forces from RFEM/RSTAB
Optional consideration of creep
Automatic determination of planned and unintentional eccentricity from the second-order analysis in addition to the existing eccentricity
Determination of internal forces according to the linear static analysis and the second-order analysis
Analysis of governing design locations along the column due to existing loading
Output of the required longitudinal and stirrup reinforcement
Summary of design ratios, including all design details

Table shows effective lengths for design of concrete columns in software. Essential for precise structural analysis.

Reduced Stirrup Spacing at Column Base and Column Head

Calculation Configurations for Stability

Concrete Design | Columns | Input

The program does a lot of work for you. The members to be designed are directly imported from RFEM/RSTAB.

You can easily define constructional properties of columns as well as other details for determining the required longitudinal and shear reinforcement. In this case, you can manually define the effective length factor ß or import it from the Structure Stability add-on.

Visualization of the cross-section utilization of concrete columns within the RFEM design process.

Design check details of stability analysis

Concrete Design | Columns | Design/Results

Do you want to perform the bending failure design? To do this, analyze the governing locations of the column for axial forces and moments. For the shear resistance design, you can also consider the locations with extreme values of shear forces. During the calculation, you determine whether a standard design is sufficient or whether the column with the moments has to be designed according to the second-order theory. You can then determine these moments using the previously entered specifications. The calculation is divided into three parts:

Load-independent calculation steps
Iterative determination of governing loading taking into account a varying required reinforcement
Safety determination of all acting internal forces, including the designed reinforcement

After a successful calculation, the results are displayed in clearly arranged tables. Each intermediate value is absolutely traceable, making the design checks transparent.