RF-/STEEL Fatigue Members Add-on Module for RFEM/RSTAB

Newsletter

Receive regular information about news, useful tips, scheduled events, special offers, and vouchers at least once a month.

Fatigue Design of Members and Sets of Members

The RF-/STEEL Fatigue Members add‑on module allows you to perform fatigue designs according to EN 1993‑1‑9 for steel members and sets of members. The fatigue design is based on the nominal stress concept. The internal forces are determined according to the structural analysis for members. The stresses are calculated according to the mechanics of materials at the location where the crack formation is expected. This means that the ranges of nominal stress Δσ and Δτ as a result of the actions are contrasted with the design values of the fatigue strength ΔσR and ΔτR.

Furthermore, the concept of the partial safety values applies in EN 1993‑1‑9. The partial safety factor γMf for the fatigue strength is graded depending on the reliability concept and the possible consequences of failure.

The RF‑/STEEL Fatigue Members add-on module provides an extensive cross‑section library and an extendable material library including the strength values given by the standard.

  1. Features

    • Full integration in RFEM/RSTAB including import of all relevant information and internal forces
    • Determination of stress ranges for the available load cases, load or result combinations
    • Free assignment of detail categories on the available stress points of the cross-section
    • User-defined specification of damage equivalent factors
    • Design of members and sets of members according to EN 1993-1-9
    • Cross-section optimization with optional transfer to RFEM/RSTAB
    • Detailed result documentation with the references to design equations used
    • Various filter and sorting options of results including result lists by member, cross-section, x-location, or by load case, load and result combination
    • Visualization of design criterion on RFEM/RSTAB model
    • Data export to MS Excel
  2. 1.1 General Data

    Input

    After opening the module, it is necessary to define designed members/sets of members, load cases, load or result combinations for the fatigue strength design.

    The materials from RFEM/RSTAB are preset and can be adjusted in RF-/STEEL Fatigue Members. Material properties listed in the respective standard are stored in the material library.

    The design requires damage equivalent factors as well as detail categories on the designed stress points to be considered in the calculation.

  3. Design results for cross-section

    Design

    The fatigue strength design is based on the analysis using damage equivalent factors. The damage-equivalent stress ranges ΔσE,2 and ΔτE,2 in relation to 2*106 stress cycles are to be compared with the limit values of the fatigue strength ΔσC or ΔτC for 2*106 stress cycles of the corresponding detail category under consideration of the partial safety factors.

    In this way, the individual design requirements are specified. Separate design cases allow for flexible analysis of selected members, sets of members, and actions as well as of individual cross-sections. You can freely define design-relevant parameters such as the design concept selection or the partial safety factors.

  4. Results graphic with design ratio

    Results

    After the calculation, the module displays results in clearly arranged result windows. All intermediate values (for example governing internal forces, adjustment factors etc.) can be included in order to make the design more transparent. The results are listed by load case, cross-section, member, and set of members.

    If the analysis fails, the relevant cross-sections can be modified in an optimization process. It is also possible to transfer the optimized cross-sections to RFEM/RSTAB for a new calculation.

    Design ratio is represented with different colors in the RFEM/RSTAB model. In this way, you can quickly recognize critical or oversized areas of the cross-section. Furthermore, result diagrams displayed on the member or set of members ensure targeted evaluation.

    In addition to input and result data including design details shown in tables, you can add any graphic into the printout report. In this way, a comprehensible and clearly arranged documentation is guaranteed. You can select the report contents and results extent specifically for the individual designs.

Contact us

Contattaci

Do you have any questions about our products? Do you need advice for your current project? 
Contact us or find various suggested solutions and useful tips on our FAQ page.

+49 9673 9203 0

info@dlubal.com

Customer Projects

Customer Projects designed by Dlubal Software products

Interesting customer projects designed with the structural analysis programs by Dlubal Software.

Price (VAT excl.)

Price
1,120.00 USD

Price is only valid for the software usage in United States.

RSTAB Main Program
RSTAB 8.xx

Main Program

The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions

RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

RSTAB Steel and Aluminium Structures
STEEL EC3 8.xx

Add-on Module

Design of steel members according to Eurocode 3

RFEM Steel and Aluminium Structures
RF-STEEL EC3 5.xx

Add-on Module

Design of steel members according to Eurocode 3

RSTAB Steel and Aluminium Structures
STEEL 8.xx

Add-on Module

Stress analysis of steel members

RFEM Steel and Aluminium Structures
RF-STEEL 5.xx

Add-on Module

Stress analysis of steel surfaces and members

RSTAB Other
RSBUCK 8.xx

Add-on Module

Stability analysis according to the eigenvalue method

RFEM Other
RF-STABILITY 5.xx

Add-on Module

Stability analysis according to the eigenvalue method

RSTAB Steel and Aluminium Structures
FE-LTB 8.xx

Add-on Module

Lateral-torsional buckling analysis of members according to the second-order analysis (FEM)

RFEM Other
RF-IMP 5.xx

Add-on Module

Generation of equivalent geometric imperfections and pre-deformed initial structures for nonlinear calculations

RFEM Dynamic Analysis
RF-DYNAM Pro - Natural Vibrations  5.xx

Add-on Module

Dynamic analysis of natural frequencies and mode shapes of member, surface, and solid models

RFEM Concrete Structures
RF-CONCRETE 5.xx

Add-on Module

Design of reinforced concrete members and surfaces (plates, walls, planar structures, shells)

RSTAB Other
RSMOVE 8.xx

Add-on Module

Generation of load cases from moving loads for members and sets of members

RSTAB Dynamic Analysis
DYNAM Pro - Natural Vibrations 8.xx

Add-on Module

Dynamic analysis of natural frequencies and mode shapes of member models

RSTAB Steel and Aluminium Structures
PLATE-BUCKLING 8.xx

Add-on Module

Plate buckling analysis of rectangular plates with or without stiffeners

RSTAB Other
RSIMP 8.xx

Add-on Module

Generation of equivalent geometric imperfections and pre-deformed initial structures for nonlinear calculations

RSTAB Dynamic Analysis
DYNAM Pro - Equivalent Loads 8.xx

Add-on Module

Seismic and static load analysis using the multi-modal response spectrum analysis

RSTAB Connections
FRAME-JOINT Pro 8.xx

Add-on Module

Design of rigid bolted frame joints according to Eurocode 3 or DIN 18800

RFEM Concrete Structures
EC2 for RFEM 5.xx

Module Extension for RFEM

Extension of the modules for reinforced concrete design by the Eurocode 2 design

RSTAB Other
DEFORM 8.xx

Add-on Module

Deformation and deflection analysis of members and sets of members

RFEM Other
RF-MAT NL 5.xx

Add-on Module

Consideration of nonlinear material laws

RFEM Other
RF-MOVE 5.xx

Add-on Module

Generation of load cases from moving loads for members and sets of members

RFEM Dynamic Analysis
RF-DYNAM Pro - Equivalent Loads 5.xx

Add-on Module

Seismic and static load analysis using the multi-modal response spectrum analysis

RSTAB Concrete Structures
FOUNDATION Pro 8.xx

Add-on Module

Design of single, bucket and block foundations

RSTAB Connections
HSS 8.xx

Add-on Module

Design of connections with hollow cross-sections according to Eurocode 3

RFEM Steel and Aluminium Structures
RF-STEEL Warping Torsion 5.xx

Module Extension for RF-STEEL EC3

Warping torsion analysis according to the second-order theory with 7 degrees of freedom

RSTAB Other
SUPER-RC 8.xx

Add-on Module

Superpositioning results of different construction stages with varying structural and loading conditions

RSTAB Concrete Structures
CONCRETE 8.xx

Add-on Module

Linear and nonlinear analysis of reinforced concrete members with reinforcement concept

RFEM Steel and Aluminium Structures
RF-FE-LTB 5.xx

Add-on Module

Lateral-torsional buckling analysis of members according to the second-order analysis (FEM)

RFEM Dynamic Analysis
RF-DYNAM Pro - Forced Vibrations 5.xx

Add-on Module

Dynamic and seismic analysis including time history analysis and multi-modal response spectrum analysis

RFEM Connections
RF-FRAME-JOINT Pro 5.xx

Add-on Module

Design of rigid bolted frame joints according to Eurocode 3 or DIN 18800

RFEM Connections
RF-HSS 5.xx

Add-on Module

Design of connections with hollow cross-sections according to Eurocode 3

RSTAB Timber Structures
TIMBER Pro 8.xx

Add-on Module

Timber design according to Eurocode 5, SIA 265 and/or DIN 1052

RSTAB Dynamic Analysis
DYNAM Pro - Forced Vibrations 8.xx

Add-on Module

Dynamic and seismic analysis including time history analysis and multi-modal response spectrum analysis

RSTAB Connections
JOINTS Steel - Column Base 8.xx

Add-on Module

Design of hinged and restrained column base footings according to Eurocode 3

RSTAB Steel and Aluminium Structures
STEEL AISC 8.xx

Add-on Module

Design of steel members according to the American standard ANSI/AISC 360