New Generation of Structural Analysis and Design Software Released!

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New Features in the Programs and Add-ons

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11 October 2021

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Current News

The new programs RFEM 6, RSTAB 9, RSECTION 1 and RWIND 2 are released now. Numerous new features have been implemented in the programs and the add-ons directly integrated in RFEM/RSTAB.

Newly Released Products

RFEM 6

The new generation of the 3D FEA software is used for the structural analysis of members, surfaces, and solids. RFEM 6 has a modern design concept with add-ons integrated directly into the program.

RSTAB 9

The 3D structural analysis software RSTAB 9 has been extensively modernized. Add-ons that are integrated directly into the program allow the design of beam structures consisting of reinforced concrete, steel, timber, masonry, etc.

RSECTION 1

The RSECTION 1 stand-alone program determines the cross-section properties for any thin-walled and solid cross-sections and performs a stress analysis. RSECTION combines the SHAPE-THIN and SHAPE-MASSIVE programs. Compared to these programs, the following new features have been added to RSECTION:

  • Graphical display of stress components
  • Scripting using Javascript
The Effective Sections extension for RSECTION determines effective sections according to EN 1993-1-5 und EN 1993-1-3. Effective Sections can be used to consider, for example, the effects of shape instability of cold-formed sections using of the eigenvalue method.

RWIND 2

The stand-alone program RWIND 2 for the numerical simulation of wind flow is available as a Basic and Pro version. RWIND Pro allows the calculation of transient incompressible turbulent wind flows (in addition to the stationary ones in RWIND Basic).

Web Service and API

Web service and API allow you to create your own desktop or web-based applications by controlling all objects included in RFEM/RSTAB. By providing libraries and functions, you can develop your own design checks, effective modeling of parametric structures, as well as optimization and automation processes using the programming languages Python and C#.

New Add-ons

Steel Joints

With the Steel Joints add-on for RFEM, you can analyze steel connections by using an FE model. Modeling runs fully automatically in the background and can be controlled by the user via the simple and familiar input of components. The loads determined on the FE model are subsequently used for the design checks of the components according to EN 1993-1-8 (incl. National Annexes).

Building Model

The RFEM add-on Building Model allows you to define and manipulate a building by means of stories. The stories can be adjusted in many ways afterwards and the story slab stiffness can be selected. Information about the stories and also the entire model (center of gravity, center of rigidity) is displayed in tables and graphics.

Masonry Design

The Masonry Design add-on for RFEM allows you to design masonry using the finite element method. It was developed as part of the research project DDMaS - Digitizing the design of masonry structures. The material model represents the nonlinear behavior of the brick-mortar combination in the form of macro-modeling.

Optimization & Costs / CO2 Emission Estimation

On the one hand, the two-part add-on Optimization & Costs / CO2 Emission Estimation finds suitable parameters for parameterized models and blocks via the artificial intelligence (AI) technique of particle swarm optimization (PSO) for compliance with common optimization criteria. On the other hand, this add-on estimates the model costs or CO2 emissions by specifying unit costs or emissions per material definition for the structural model.

Time-Dependent Analysis (TDA)

Time-Dependent Analysis (TDA) add-on allows you to consider time-dependent material behavior of members. The long-term effects, such as creep, shrinkage, and aging, can influence the distribution of internal forces, depending on the structure.

New Add-on Features

Structure Stability

Compared to the RF-/STABILITY (RFEM 5) and RSBUCK (RSTAB 8) add-on modules, the following new features have been added to the Structure Stability add-on for RFEM 6 / RSTAB 9:

  • Activation as a property of a load case or load combination
  • Automated activation of the stability calculation via combination wizards for several load situations in one step
  • Incremental load increase with user-defined termination criteria
  • Modification of the mode shape normalization without recalculation
  • Result tables with filter option

Construction Stages Analysis (CSA)

Compared to the RF-/STAGES add-on module (RFEM 5), the following new features have been added to the Construction Stages Analysis (CSA) add-on for RFEM 6:

  • Consideration of construction stages at RFEM level
  • Integration of the construction stage analysis into the combinatorics in RFEM
  • Additional structural elements, such as line hinges, are supported
  • Analysis of alternative construction processes in a model
  • Reactivation of elements

Form-Finding

Compared to the RF-FORM-FINDING add-on module (RFEM 5), the following new features have been added to the Form-Finding add-on for RFEM 6:

  • Specification of all form-finding load boundary conditions in one load case
  • Storage of form-finding results as initial state for further model analysis
  • Automatic assignment of the form-finding initial state via combination wizards to all load situations of a design situation
  • Additionally form-finding geometry boundary conditions for members (unstressed length, maximum vertical sag, low-point vertical sag)
  • Additional form-finding load boundary conditions for members (maximum force in member, minimum force in member, horizontal tension component, tension at i-end, tension at j-end, minimum tension at i-end, minimum tension at j-end)
  • Material type "Fabric" and "Foil" in material library
  • Parallel form-findings in one model
  • Simulation of sequentially building form-finding states in connection with the Construction Stages Analysis (CSA) Add-On

Torsional Warping (7 DOF)

Compared to the RF-/STEEL Warping Torsion add-on module (RFEM 5 / RSTAB 8), the following new features have been added to the Torsional Warping (7 DOF) add-on for RFEM 6 / RSTAB 9:

  • Complete integration into the environment of RFEM 6 and RSTAB 9
  • 7th degree of freedom is directly taken into account in the calculation of members in RFEM/RSTAB on the entire system
  • No more need to define support conditions or spring stiffnesses for calculation on the simplified equivalent system
  • Combination with other add-ons possible, for example for calculation of critical loads for torsional buckling and lateral-torsional buckling with stability analysis
  • No restriction to thin-walled steel sections (it is also possible to calculate ideal overturning moments for beams with massive timber sections, for example)

Modal Analysis

Compared to the RF-/DYNAM Pro - Natural Vibrations add-on module (RFEM 5 / RSTAB 8), the following new features have been added to the Modal Analysis add-on for RFEM 6 / RSTAB 9:

  • Preset combination coefficients for various standards (EC 8, ASCE, etc.)
  • Optional neglect of masses (e.g. mass of foundations)
  • Methods for determining the number of mode shapes (user-defined, automatic - to reach effective modal mass factors, automatic - to reach the maximum natural frequency)
  • Output of modal masses, effective modal masses, modal mass factors, and participation factors
  • Tabular and graphical output of masses in mesh points
  • Various scaling options for mode shapes in the result navigator

Response Spectrum Analysis

Compared to the RF-/DYNAM Pro - Equivalent Loads add-on module (RFEM 5 / RSTAB 8), the following new features have been added to the Response Spectrum Analysis add-on for RFEM 6 / RSTAB 9:

  • Response spectra of numerous standards (EN 1998, DIN 4149, IBC 2018, etc.)
  • User-defined response spectra or those generated from accelerograms
  • Approach of direction-related response spectra
  • Results are stored centrally in a load case with underlying levels to ensure clarity
  • Accidental torsional actions can be taken into account automatically
  • Automatic combinations of seismic loads with the other load cases for use in an accidental design situation

Geotechnical Analysis

Compared to the RF-SOILIN add-on module (RFEM 5), the following new features have been added to the Geotechnical Analysis add-on for RFEM 6:

  • Creation of the layered soil as a 3D model from the entirety of the defined soil samples
  • Recognized material law according to Mohr-Coulomb for soil simulation
  • Graphical and tabular output of stresses and strains at any depth of the soil
  • Optimal consideration of the soil-structure interaction on the basis of an overall model

Stress-Strain Analysis

Compared to the RF-/STEEL add-on module (RFEM 5 / RSTAB 8), the following new features have been added to the Stress-Strain Analysis add-on for RFEM 6 / RSTAB 9:

  • Treatment of members, surfaces, solids, welds (line welded joints between two and three surfaces with subsequent stress design)
  • Output of stresses, stress ratios, stress ranges, and strains
  • Limit stress depending on the assigned material or a user-defined input
  • Individual specification of the results to be calculated through freely assignable setting types
  • Non-modal result details with prepared formula display and additional result display on the cross-section level of members
  • Output of the design check formulas used

Concrete Design

The Concrete Design add-on combines all CONCRETE add-on modules from RFEM 5 / RSTAB 8. Compared to these add-on modules, the following new features have been added to the Concrete Design add-on for RFEM 6 / RSTAB 9:

  • Input of design-relevant specifications (effective lengths, durability, reinforcement directions, surface reinforcement) directly in the RFEM or RSTAB model
  • Extensive input options for longitudinal and transverse reinforcement of members
  • Detailed intermediate results for the design with specification of the equations of the applied standard for better traceability of the calculation
  • New interaction diagram with interactive graphic for N, M, and M + N from cross-section design incl. output of the secant and tangent stiffness
  • Design of the defined reinforcement in the ultimate limit state and serviceability limit state incl. graphical output of the design ratio for the respective component
  • Automatic check of the defined reinforcement with regard to the construction or general reinforcement rules for reinforced member and surface components
  • Cross-section design optionally with net values of the concrete section
  • Design according to the Russian standard SP 63.13330

Steel Design

Compared to the RF-/STEEL EC3 add-on module (RFEM 5/RSTAB 8), the following new features have been added to the Steel Design add-on for RFEM 6 / RSTAB 9:

  • In addition to Eurocode 3, other international standards are integrated (e.g. AISC 360, CSA S16, GB 50017, SP 16.13330)
  • Consideration of hot-dip galvanizing (DASt guideline 027) in the fire protection design according to EN 1993-1-2
  • Input option for transverse stiffeners that can be taken into account in the shear buckling analysis
  • Lateral-torsional buckling can also be checked for hollow sections (e.g. relevant for slender, high rectangular hollow sections)
  • Automatic detection of members or member sets valid for the design (e.g. automatic deactivation of members with invalid material or members already contained in a set of members)
  • Design settings can be adjusted individually for each member
  • Graphical display of the results in the gross section or the effective section
  • Output of the used design check formulas (including a reference to the used equation from the standard)

Timber Design

Compared to the RF-/TIMBER Pro add-on module (RFEM 5/RSTAB 8), the following new features have been added to the Timber Design add-on for RFEM 6 / RSTAB 9:

  • In addition to Eurocode 5, other international standards are integrated (SIA 265, ANSI/AWC NDS, CSA 086, GB 50005)
  • Design of compression perpendicular to grain (support pressure)
  • Implementation of eigenvalue solver for determining the critical moment for lateral-torsional buckling (only EC 5)
  • Definition of different effective lengths for design at normal temperature and fire resistance design
  • Evaluation of stresses via unit stresses (FEA)
  • Optimized stability analyses for tapered members
  • Unification of the materials for all national annexes (only one "EN" standard is now available in the material library for a better overview)
  • Display of cross-section weakenings directly in the rendering
  • Output of the used design check formulas (including a reference to the used equation from the standard)

Aluminum Design

Compared to the RF-/ALUMINUM add-on module (RFEM 5/RSTAB 8), the following new features have been added to the Aluminum Design add-on for RFEM 6 / RSTAB 9:

  • In addition to Eurocode 9, the US standard ADM 2020 is integrated
  • Consideration of the stabilizing effect of purlins and sheets by rotational restraints and shear panels
  • Graphical display of the results in the gross section
  • Output of the used design check formulas (including a reference to the used equation from the standard)

Keywords

RFEM 6 RSTAB 9 RSECTION 1 RWIND 2 Web service API New Features

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Modeling and Design of Steel Structures in RFEM 6 and RSTAB 9

Modeling and Design of Steel Structures in RFEM 6 and RSTAB 9

Webinar 20 October 2021 2:00 PM - 3:00 PM CEST

New Features in RFEM 6 and RSTAB 9

New Features in RFEM 6 and RSTAB 9

Webinar 15 October 2021 10:00 AM - 11:00 AM CEST