RFEM A Structural Analysis Program for Planar and Spatial Frameworks

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RFEM is provided as a stand-alone analysis package for frameworks, for a total once off price of and excludes the price of add-on modules
RFEM 2D is a framework program for planar models and girder grillages, for a total once off price of and excludes the price of add-on modules
Price is based on the current Rand/Euro exchange rate

The information provided here is taken from the Dlubal website and presented here for ease of access. Please contact us to get more in-depth information at sales in order to request more information, or to obtain an information pack containing a trial version of the software, the manual for the software and training videos available from the Dlubal website but packaged on DVD for convenience. A brief presentation compiled by Tessera is included, detailing our services.

RFEM is a powerful 3D FEA program helping structural engineers to meet requirements in modern civil engineering. Intuitive handling, user friendliness and efficient data input make working with RFEM easy. The RFEM program family is based on a modular system. The main program RFEM is used to define structures, materials and loads for planar and spatial structural systems consisting of plates, walls, shells and members. Creating combined structures as well as modeling solid and contact elements is also possible. RFEM provides deformations, internal and support forces as well as soil contact stresses. Add-on modules facilitate the data input by creating structures as well as connections automatically and perform further analyses and designs.


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Summary of the RFEM add-on modules

  • RF-STEEL performs general stress designs by calculating existing stresses and comparing them with the limit stresses. During the stress analysis process, the program also determines the maximum stresses of sets of members and shows the governing internal forces for each member. In addition, RF-STEEL offers you an automatic cross-section optimization including an export option for modified cross-sections to RFEM. Separate RF-STEEL design cases allow for a flexible analysis of stresses.
  • RF-STEEL EC3 performs all typical ultimate limit state designs, stability and deformation analyses as well as fire protection designs for structural steel according to, EN 1993-1-1:2005 + AC:2009, EN 1993-1-2:2006 + AC:2005 (fire protection design), EN 1993-1-4:2006 (stainless steel)and EN 1993-1-5:2006.
  • The RFEM add-on module RF-ALUMINIUM designs members and sets of members consisting of aluminum for the ultimate and the serviceability limit state according to the standard EN 1999-1-1:2007 (Eurocode 9).
  • RF-KAPPA performs the analysis for flexural buckling of members and sets of members subjected to loading due to uniaxial bending with axial force or biaxial bending with and without axial force. The flexural buckling analysis is carried out according to DIN 18800-2:1990-11. As RF-KAPPA allows for a check of (c/t) ratios, it is also possible to perform an analysis for local buckling. The ultimate limit state design can be carried out according to the elastic-plastic method or, for structures subjected to dynamic actions, the elastic-elastic method.
  • Take advantage of RF-LTB to design your structural systems efficiently. The program determines and applies stiffness-increasing effects conforming to standard, such as rotational restraints, shear panels, warp stiffenings, plastic cross-section resources or specific support conditions. The determination of the moment coefficient ζ and thus of the ideal elastic critical moment Mcr follows different approaches.
  • The add-on module RF-FE-LTB is used to detach planar sub-structures from spatial RFEM models to calculate them according to the second-order analysis for torsional buckling considering warping. The program imports geometrical, support and load data from RFEM automatically. Subsequent to the calculation, RF-FE-LTB displays deformations, internal and support forces as well as stresses. As warping torsion is taken into account by the module's calculations, the program displays also the results for bimoment distribution and the diagrams for primary and secondary torsion.
  • The RFEM add-on module RF-C-TO-T checks the effectiveness of cross-section elements under compressive stresses. The design is described in the standard DIN 18800, part 1, el. (745) and (753), and in Tables 12 to 15. Having fulfilled the requirements of the width-to-thickness analysis, stability designs for buckling are no longer necessary.
  • RF-CONCRETE is an RFEM add-on module used to perform the reinforced concrete design of member elements. Take advantage of this program to evaluate RFEM internal forces in various design cases. You can combine any number of members as well as load cases, load combinations and result combinations in individual RF-CONCRETE cases for the design process. In this way, it is possible to quickly calculate alternative designs using different concrete strength classes or modified cross-sections. The design is carried out for uni- and biaxial bending with axial force as well as shear and torsion.
  • The add-on module RF-CONCRETE Columns is a powerful software tool of the RFEM program family used to design reinforced concrete. Take advantage of RF-CONCRETE Columns to perform the ultimate limit state design for rectangular or circular compression elements according to the model column method (method based on nominal curvature). By purchasing the corresponding module extensions you can perform the design according to the following standards: EN 1992-1-1:2004 + AC:2010 (EC2 for RFEM required) and DIN 1045-1:2008-08 (DIN 1045-1 for RFEM required). The fire protection design is carried out according to EN 1992-1-2:2004 (EC2 for RFEM required) and DIN 4102-04:2004 or DIN 4102-22:2004 (DIN 1045-1 for RFEM required). The standards specify that, when determining the internal forces for structural components subjected to compression, you have to take into account the deformations (second-order analysis), if the linear-elastically determined internal forces are increased by more than 10 % due to deformation. To avoid a non-linear calculation that can be checked only with difficulty, it is possible to determine the internal forces affected by deformation in a simplified way using a "model column". In accordance with your user-defined specifications, the program transfers the selected members into model columns.
  • The add-on module RF-CONCRETE NL is an extension to the RF-CONCRETE module group and is organized like the main concrete module in two parts: RF-CONCRETE NL as an extension of RF-CONCRETE Surfaces allows for a realistic calculation of deformations, stresses and crack widths of members, plates, walls, planar structures and shells made of reinforced concrete by taking into account the nonlinear behavior of the composite material when determining internal forces and deformations. RF-CONCRETE NL as an extension of RF-CONCRETE Members makes it possible to perform a nonlinear analysis of 2D and 3D framework structures in the ultimate and serviceability limit states. You are able to carry out for example a nonlinear calculation of compression elements prone to instability risks, or to calculate deformations of frame constructions consisting of reinforced concrete beams close to reality.
  • The add-on module RF-CONCRETE Deflect is an extension of the module groups RF-CONCRETE and RF-CONCRETE 2D. Integrated in RF-CONCRETE Surfaces, the program allows for a deflection analysis of plate structures conforming to standard specifications when performing the analytical serviceability limit state design. The deformation analysis can be carried out according to the following standards: EN 1992-1-1:2004 + AC:2010 (EC2 for RFEM required), DIN 1045-1:2008-08 (DIN 1045-1 for RFEM required), SIA 262:2003 (SIA 262 for RFEM required), ACI 318-11 (ACI 318-11 for RFEM required), GB 50010-2010: Code for Design of Concrete Structures, 1. edition, July 2011 (GB 50010 for RFEM required). Take advantage of RF-CONCRETE Deflect to quickly and easily perform the design for limiting the deflection of reinforced concrete surfaces by taking into account different cross-section conditions in uncracked and cracked sections (state I/state II).
  • The RFEM add-on module RF-PUNCH is used for the design of punching shear resistance for surfaces supported by columns or nodal supports. The governing punching load is automatically determined from the specified load. But it is also possible to apply a concentrated punching load to a plate manually. RF-PUNCH allows for a quick punching shear design without entering lots of data. The following standards are available: EN 1992-1-1:2004 + AC:2010 (EC2 for RFEM required) and DIN 1045-1:2008-08 DIN 1045-1 for RFEM required)
  • EC2 for RFEM represents an additional standard option for designing reinforced concrete according to EN 1992-1-1: 2004 + AC:2010 (Eurocode 2) including the integrated national application documents (NAD) for the following RFEM add-on modules: RF-CONCRETE, consisting of RF-CONCRETE Surfaces for design of surfaces and RF-CONCRETE Members for design of member elements; RF-CONCRETE 2D, consisting of RF-CONCRETE Surfaces for design of surfaces and RF-CONCRETE Members for design of member elements, RF-CONCRETE Columns, RF-PUNCH, RF-CONCRETE NL and RF-CONCRETE Deflect
  • The add-on module RF-FOUNDATION Pro is used to design single, bucket and block foundations for all support forces arising in the RFEM model. The reinforced concrete design of the foundation is performed according to the standard EN 1992-1-1:2004 +AC:2010. The geotechnical designs are performed according to the standard EN 1997-1. In addition to the support forces from RFEM, the program allows for specifying loads to be integrated into the foundation's design. RF-FOUNDATION Pro provides a reinforcement proposal for the upper and lower plate reinforcement which can always be adjusted individually.
  • RF-TENDON is used to define the tendon layout within concrete members and to determine equivalent prestressing forces. The add-on module represents the basis for prestressed concrete design with pre-tensioned and bonded post-tensioned concrete according to EN 1992-1-1 and EN 1992-2 in the add-on module RF-TENDON Design.
  • With RF-TENDON Design you can design pre-stressed concrete members with pre-tensioned and bonded post-tensioned concrete according to EN 1992-1-1 and EN1992-2, based on the results calculated in RF-TENDON and RFEM. You can perform designs according to the standards EN 1992-1-1 and EN 1992-2
  • The program RF-TIMBER Pro is integrated into the user interface of the finite elements program RFEM as an optional add-on module. RF-TIMBER Pro designs timber members and sets of members on the basis of new design procedures specified in the standards EN 1995-1-1:2004-11+A1:2008, SIA 265:2003 and DIN 1052:2008-12. A comprehensive cross-section library and an extendable material library are available, including specific parameters given by a relevant standard. The RF-TIMBER Pro module carries out the ultimate limit state design and serviceability limit state design. The stability analysis, either by means of the equivalent member method or the second order theory, is also included in the calculation process. In addition, the fire resistance design is available. In RF-TIMBER Pro, you can optimize cross-sections and export them to RFEM.
  • The basic module RF-TOWER Structure represents an innovative tool for generating 3D tower structures being rather complex in their geometry. Lattice towers and radio masts can be created comfortably due to the input of parameters. In addition, it is possible to adjust already existing RFEM models in the add-on module RF-TOWER Structure.
  • Towers are used as supporting structures for transmitting antennas and further equipment such as platforms, ladders and cable lines that must be taken into account for the design. Take advantage of the add-on module RF-TOWER Equipment to easily create transmitter towers with the relevant equipment.
  • Take advantage of the third RF-TOWER module to create design relevant actions for RFEM. The loads can be specified as parameterized wind, ice and variable loads. The objects defined in RF-TOWER Structure and RF-TOWER Equipment are also taken into account for the generation.
  • The add-on module RF-TOWER Effective Lengths determines the buckling lengths of members used in lattice towers with square, rectangular or triangular floor plans. When entering data the program considers user-created lattice towers generated in the main program RFEM as well as lattice towers from the add-on modules RF-TOWER Structure and RF-TOWER Equipment. Subsequent to the determination of the effective lengths you can export them to the add-on module RF-TOWER Design for further use.
  • The add-on module RF-TOWER Effective Lengths determines the buckling lengths of members used in lattice towers with square, rectangular or triangular floor plans. When entering data the program considers user-created lattice towers generated in the main program RFEM as well as lattice towers from the add-on modules RF-TOWER Structure and RF-TOWER Equipment. Subsequent to the determination of the effective lengths you can export them to the add-on module RF-TOWER Design for further use.
  • The design program RF-GLASS is an add-on module integrated in the finite element program RFEM. Therefore, many functions can be shared. The global printout report and the detailed graphical representation are only one of the program's remarkable features.
  • The RFEM add-on module RF-FRAME-JOINT Pro creates and classifies bending-resistant, bolted connections between columns and horizontal beams. The rigid bolt connections are designed by the ultimate load method according to Eurocode 3 or DIN 18800. Furthermore, it is possible to apply stiffeners, supplementary web plates as well as backing plates. In addition, you can check the geometrical feasibility of connections with respect to the size of the wrench used for tightening screws.
  • The RFEM add-on module RF-END-PLATE is used to calculate bending-resistant end plate connections with high-strength friction-grip bolts and rigid weld connections according to DIN 18800-1:1990-11. RF-END-PLATE provides a design and dimensioning mode for bolts, end plates and all welds of the connection. You can design the connections with double and singly symmetrical I-sections for an uniaxial acting moment with axial and shear force.
  • With the RFEM add-on module RF-CONNECT, you can dimension three types of shear connections typical for steel constructions, performing the design according to DIN 18800-1:1990-11. The connection can be clearly documented with graphics and numerical values in the printout report. It is also possible to print a dimensioned 3D graphic of the connection.
  • The RFEM add-on module RF-DSTV (German Steel Construction Association) designs moment resisting and pinned I-beam connections for members according to the German guideline "Typified Connections in Steel Building Construction". The design capacities are determined in accordance with the standards DIN 18800-1:1990-11 and DIN V ENV 1993-1-1/A2:202-05. You can design moment resisting connections by means of a flush or extended end plate, by coped connections or pinned beam connections using end plates and angles. The connections can be visualized efficiently in the rendering mode. The program displays all required structural dimensions for end plates and angles as well as the corresponding hole arrangements.
  • RF-HSS is an RFEM add-on module used to design and analyze hollow section connections. The connections can be imported from RFEM, as well defined manually within the add-on module. Planar and spatial truss nodes, which contain round, square or rectangular hollow sections, can be designed. RF-HSS performs the ultimate limit state design according to specifications given in Eurocode 3 (EN 1993-1-8:2005).
  • RF-JOINTS Steel - Column Base designs footings of hinged and restrained steel columns according to EN 1993-1-8
  • Use the add-on module RF-DOWEL to design typical dowel connections with slotted sheets often used in timber construction. The program is integrated in the main program RFEM. You can design all frequently used joints of rectangular cross-sections typical for framework structures. In addition to the connection's bearing capacity, RF-DOWEL checks the geometric feasibility. Each time the program calculates the minimum distances, the differences of the fiber-load angle are considered again. The following standards are available: DIN 1052:2008-12, DIN 1052:1988, SIA 164/HBT2 and ÖNorm B4100/2. For DIN 1052:1988, SIA 164/HBT2 and ÖNORM B4100/2 it is possible to design dowels also in accordance with the connecting systems of SFS intec and BSB (Blumer).
  • The add-on module RF-DYNAM allows for a quick and comfortable analysis of eigenfrequencies for structures modeled in RFEM. All required input values can be imported from RFEM automatically. Take advantage of RF-DYNAM Basic to analyze eigenfrequencies of planar and spatial plates, structures consisting of walls and shells, planar and spatial frameworks as well as of combined structures. To determine up to 1,000 of the lowest eigenvalues, powerful equation solver methods are available (subspace iteration method, ICG iteration method).
  • RF-DYNAM Addition I is an extension of the RFEM add-on module RF-DYNAM. It carries out the dynamic structural analysis considering an external excitation. You can define various excitation functions by using time histories of forces or moments, accelerations (accelerogram) or harmonic loads. The excitation can be described by means of specified response spectra as well. The eigenmodes calculated in RF-DYNAM Basic can be used to determine time histories or extreme values of the following quantities: internal forces of members, surfaces, and solids; nodal and line support forces; deformations; deformation velocities; surface contact stresses and solid stresses.
  • RF-DYNAM Addition II is an add-on module for RFEM to determine loadings due to equivalent seismic loads according to the multi-modal response spectrum method: DIN 4149:2005-04, DIN 4149:1981-04, EN 1998-1:2004-11, ENV 1998-1-1:1994, IBC 2000 and IBC 2009-ASCE/SEI 7-05. RF-DYNAM Addition II requires the results of the natural frequency calculation provided by RF-DYNAM Basic.
  • The RFEM add-on module RF-DEFORM performs the deformation analysis of individual members and complete sets of members. The allowable limit deformations can be set individually in relation to the undeformed system and displaced member ends.
  • The RFEM add-on module RF-MOVE creates load cases from various positions of moving loads such as cranes or cars on bridges. When generating those loads, it is possible to create also an enveloping load combination. The data is entered only in two input tables. In this way, and due to the quick load case generation for RFEM, you can save a lot of time.
  • The add-on module RF-IMP is used to create imperfections for the geometrically non-linear calculation automatically. Thus, in RFEM when calculating according to the second-order or the large deformation analysis, you can perform ultimate limit state designs including stability. This applies not only to framework structures, but also to structures with shell and solid elements.
  • Use RF-STABILITY to analyze the stability of structures. The RFEM add-on module determines critical load factors and the corresponding stability modes.
  • The RF-SOILIN module determines the elastic foundation by means of soil layers. A realistic determination of soil conditions is important for the structural analysis of buildings. The designs can be performed according to the following standards: DIN 4019-1:1979-04, EN 1997-1:2004 and CSN 73 1001
  • RF-INFLUENCE is an add-on module for RFEM which creates influence lines and influence surfaces due to a constant design force such as axial force, shear force, or bending moment. Influence lines and surfaces are used to express graphically how a unit load affects the internal reactions on any load position of the model. Use this advanced RFEM setting to take into account nonlinear material behavior.
  • RF-STAGES is an add-on module for RFEM that analyzes frameworks, plate and solid structures by taking account of the construction progress' influence. If the influence of different construction stages is neglected, errors may occur when calculating entire building models. RF-STAGES allows you to simulate these effects and to use the results for designing the structural system.
  • The add-on module RF-LAMINATE is used to perform deflection analyses and stress designs for laminate surfaces. The calculation taking into account shear coupling follows the sandwich (laminate) theory. Based on a user-defined layer structure, the program creates a local overall stiffness matrix for the respective surface. Take advantage of RF-LAMINATE to design for example cross laminated timber elements, or to calculate layer elements used in concrete constructions or structures consisting of different elements.
  • RF-COM is a programmable interface (API) based on COM technology. Using this interface, you can customize RFEM to suit your individual needs and program input macros or post-run routines.
  • The add-on module RX-LINK extends the options to import data in RFEM. After the successful installation, the following additional interfaces are available: Standard Acis Text Format (*.sat), Initial Graphics Exchange Specification (*.igs, *.iges) and Standard for the Exchange of Product Model Data (*.stp, *.step). These data formats make it possible to import the geometry of the model as boundary lines, surfaces and solids. The models can be imported either as RFEM objects (nodes, lines, surfaces, solids) or as background layers so that the nodes can be set manually. The quality of the imported model depends on the original program. The import is carried out via files exclusively. Those formats are used mainly in the area of mechanical engineering.

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