RF-CONCRETE Add-on Module for RFEM
Reinforced Concrete Design of Members and Surfaces
The RF-CONCRETE add‑on module for the design of structural components made of reinforced concrete consists of two separate parts:
- RF-CONCRETE Surfaces designs slabs, elevated slabs, plates, walls, planar structures, and shells for the ultimate and the serviceability limit state.
- RF-CONCRETE Members designs member elements of reinforced concrete structures.
RF-CONCRETE performs reinforced concrete design of surfaces, members, and sets of members for the ultimate and the serviceability limit state. The corresponding extensions enable the design according to the following standards:
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EN 1992-1-1:2004 + A1:2014 (requires EC2 for RFEM) -
DIN 1045-1:2008-08 (requires DIN 1045-1 for RFEM) -
ACI 318 (requires ACI 318 for RFEM) -
CSA A23.3 (requires CSA A23.3 for RFEM) -
SIA 262 (requires SIA 262 for RFEM) -
GB 50010-2010: Code for Design of Concrete Structures, 1st edition, July 2011
(requires GB 50010 for RFEM)
Optionally, it is possible to perform the fire resistance design of rectangular and circular cross‑sections according to:
- EN 1992-1-2:2004 (requires EC2 for RFEM)
The RF‑CONCRETE add‑on module is also available in a well‑priced 2D version.
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Features
- Automatic import of internal forces from RFEM
- Ultimate limit state and serviceability limit state design
- With the module extension EC2 for RFEM the design of reinforced concrete members can be carried out according to Eurocode 2 (EN 1992‑1‑1:2004) and the following National Annexes:
- DIN EN 1992-1-1/NA/A1: 2015-12 (Germany)
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ÖNORM B 1992-1-1: 2018-01 (Austria) 
NBN EN 1992-1-1 ANB: 2010 (Belgium)
BDS EN 1992-1-1: 2005/NA: 2011 (Bulgaria)-
EN 1992-1-1 DK NA: 2013 (Denmark) -
NF EN 1992-1-1/NA: 2016-03 (France) -
SFS EN 1992-1-1/NA: 2007-10 (Finland) 
UNI EN 1992-1-1/NA: 2007-07 (Italy)
LVS EN 1992-1-1: 2005/NA: 2014 (Latvia)
LST EN 1992-1-1: 2005/NA: 2011 (Lithuania)
MS EN 1992-1-1: 2010 (Malaysia)
NEN-EN 1992-1-1 + C2: 2011/NB: 2016 (Netherlands)-
NS EN 1992-1 -1: 2004-NA: 2008 (Norway) 
PN EN 1992-1-1/NA: 2010 (Poland)
NP EN 1992-1-1/NA: 2010-02 (Portugal)
SR EN 1992-1-1: 2004/NA: 2008 (Romania)
SS EN 1992-1-1/NA: 2008 (Sweden)
SS EN 1992-1-1/NA: 2008-06 (Singapore)
STN EN 1992-1-1/NA: 2008-06 (Slovakia)
SIST EN 1992-1-1: 2005/A101: 2006 (Slovenia)
UNE EN 1992-1-1/NA: 2013 (Spain)
CSN EN 1992-1-1/NA: 2016-05 (Czech Republic)
BS EN 1992-1-1: 2004/NA: 2005 (United Kingdom)
CPM EN 1992-1-1: 2009 (Belarus)
CYS EN 1992-1-1: 2004/NA: 2009 (Cyprus)
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- Flexibility due to detailed setting options for basis and extent of calculations
- Quick and clear results output for an overview of the distribution of results immediately subsequent to the design
- Graphical results output integrated in RFEM, for example required reinforcement
- Clearly-arranged numerical results output displayed in tables and option to represent results graphically in the model
- Complete integration of data output in the RFEM printout report
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Features of RF-CONCRETE Members
- Determination of longitudinal, shear and torsional reinforcement
- Representation of minimum and compression reinforcement
- Determination of neutral axis depth, concrete and steel strains
- Design of member cross-sections affected by bending about two axes
- Design of tapered members
- Determination of deformation in cracked sections (state II), for example according to EN 1992-1-1, 7.4.3
- Consideration of tension stiffening
- Consideration of creep and shrinkage
- Itemization of reasons for failed design
- Design details for all design locations for better traceability of reinforcement determination
- Options to optimize cross‑sections
- Visualization of concrete cross‑section with reinforcement in 3D rendering
- Output of complete steel schedule
- Fire resistance design according to the simplified method (zone method) according to EN 1992‑1‑2 for rectangular and circular cross‑sections
- Optional extension of the RF‑CONCRETE Members add‑on module with a nonlinear calculation of frameworks for the ultimate and the serviceability limit state. The extension enables design of potentially unstable structural components by means of a nonlinear calculation, or a nonlinear deformation analysis of 3D frameworks. Find more information under the product description of the RF-CONCRETE NL add‑on module.
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Features of RF-CONCRETE Surfaces
- Free definition of two or three reinforcement layers in the ultimate limit state
- Vectorial representation of the main stress directions of internal forces allowing optimal orientation adjustment of the third reinforcement layer to the actions
- Design alternatives to avoid compression or shear reinforcement
- Design of surfaces as deep beams (theory of membranes)
- Option to define basic reinforcements for top and bottom reinforcement layer
- Definition of designed reinforcement for serviceability limit state design
- Results output in grid points of any selected grid
- Optional extension of the module with nonlinear deformation analysis. The calculation is performed in RF‑CONCRETE Deflect by reducing the stiffness according to the standard, or in RF‑CONCRETE NL by the general nonlinear calculation determining the stiffness reduction in an iterative process.
- Design with design moments at column edges
- Itemization of reasons for failed design
- Design details of all design locations for better traceability of reinforcement determination
- Export of isolines for the longitudinal reinforcement in a DXF file for further use in CAD programs as a basis for reinforcement drawings
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Input
In order to facilitate the data input, there are surfaces, members, sets of members, materials, surface thicknesses, and cross-sections preset in RFEM. It is possible to select the elements graphically using the [Select] function. The program provides access to the global material and cross-section libraries. Load cases, load combinations, and result combinations can be combined in various design cases. You can enter all geometric and standard-specific reinforcement settings for the reinforced concrete design in a segmented window. The geometry entries in both RF‑CONCRETE modules differ from each other.
- In the RF‑CONCRETE Members add‑on module, you can define for example the curtailment of rebars, the number of layers, the cutting ability of links, and the anchorage type. For the fire resistance design of reinforced concrete members, you have to define the fire resistance class, the fire‑related material properties as well as the cross‑section sides exposed to fire.
- In the RF‑CONCRETE Surfaces add‑on module, it is necessary to specify for example the concrete cover, the reinforcement direction, the minimum and the maximum reinforcement, the basic reinforcement to be applied or the designed longitudinal reinforcement as well as the rebar diameter.
Surfaces or members can be summarized in special "reinforcement groups", each defined by different design parameters. In this way, it is possible to efficiently calculate alternative designs with different boundary conditions or modified cross‑sections. -
Results
After the calculation, the module shows clearly arranged tables listing the required reinforcement and the results of the serviceability limit state design. All intermediate values are included in a comprehensible manner.
The results of RF‑CONCRETE Members are displayed as result diagrams of each member. The reinforcement proposals of the longitudinal and the shear reinforcement including sketches are documented in accordance with current practice. It is possible to edit the reinforcement proposal and to adjust for example the number of members and the anchorage. The modifications will be updated automatically. A concrete cross‑section including reinforcement can be visualized in a 3D rendering. In this way, the program provides an optimal documentation option to create reinforcement drawings including steel schedule.
The result of RF‑CONCRETE Surfaces can be displayed graphically as isolines, isosurfaces, or numeric values. It is possible to sort the longitudinal reinforcement display by required reinforcement, required additional reinforcement, provided basic or additional reinforcement, and by provided total reinforcement. The isolines of the longitudinal reinforcement can be exported as a DXF file for further use in CAD programs as a basis for reinforcement drawings.
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New
Design of concrete columns subjected to centric compression with RF-CONCRETE Members
This article deals with rectilinear elements whose cross -section is subjected to a normal compressive force. In this article, the aim is to show the consideration of numerous parameters defined in the Eurocodes for the design of concrete columns in the design software RFEM.
Material Model Orthotropic Masonry 2D
The material model Orthotropic Masonry 2D is an elastoplastic model that additionally allows softening of the material, which can be different in the local x- and y-direction of a surface. The material model is suitable for (unreinforced) masonry walls with in-plane loads.
- I obtain different results when comparing the deformation analysis in the RF‑CONCRETE add-on modules and another calculation program. What could be the reason for this?
- For the design, I can only select the surrounding reinforcement for a rectangular cross-section. Why?
- What does the "Crack formation in the first 28 days" option means?
- I have recently purchased RSTAB with the CONCRETE add-on module. Can I use it to perform the stability analysis of reinforced concrete columns?
- Why does the note 155) appear as a result of the reinforced concrete design of members for the existing stirrup reinforcement?
- Why do RF‑CONCRETE Members or CONCRETE determine a significantly higher provided reinforcement than the required reinforcement?
- How can I select a diameter of rebars for the design of reinforced concrete beam structures that is not available in the list of possible diameters?
- Why do I get Error No. 10203 for a result beam when performing design with RF‑CONCRETE Members?
- Which tensile strength of concrete is used for the transition from State I to State II? fctm or fct;0.05?
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How can I retrospectively reduce the determined provided longitudinal reinforcement in RF‑CONCRETE Columns?
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