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2021-09-07

Stress-Strain Analysis Add-on

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

Output of Stresses, Graphically and Tabularly

Do you have any questions?

Events

2024-05-02

Construction Stages in Membrane Structures with RFEM 6

Webinar

Construction Stages in Membrane Structures with RFEM 6

2024-05-08

Online Training

RFEM 6 | Students | Introduction to Reinforced Concrete Design

2024-05-23

Most Frequently Asked Questions Answered by Dlubal Support Team

Webinar

Most Frequently Asked Questions Answered by Dlubal Support Team | May 2024

2024-10-23

Online Training

RSECTION 1 | Students | Introduction to Strength of Materials

2024-10-30

Online Training

RFEM 6 | Students | Introduction to FEM

2024-11-13

Online Training

RFEM 6 | Students | Introduction to Reinforced Concrete Design

Videos

Event

RFEM 6 for Students | Introduction to FEM | Mai 4, 2023

Length: 03:12:04 min

FAQ

FAQ 005336 | How can I animate a load increase or a construction process?

Length: 00:00:46 min

FAQ

FAQ 005317 | How do I create a user-defined fabric?

Length: 00:01:11 min

General

WIN | 09/2022 - What's New in RFEM 6 and RSTAB 9?

Length: 00:01:53 min

Event

Most Frequently Asked Questions Answered by Dlubal Support Team | September 2022

Length: 00:31:15 min

FAQ

FAQ 005307 | Is it possible to borrow an online license of RFEM 6/RSTAB 9 over an extended period...

Length: 00:00:22 min

Event

Form-Finding and Calculation of Membrane Structures in RFEM 6

Length: 01:12:48 min

FAQ

FAQ 005303 | How can I insert a smooth range / a smooth line in a result diagram of RFEM 6?

Length: 00:01:01 min

FAQ

FAQ 005304 | How can I create a nodal support with the "Partial Activity" nonlinearity...

Length: 00:00:13 min

Playlist

Models to Download

233x

15x

Gazebo

Model 004706 | Model of Stuttgart Central Station

248x

29x

Model of Stuttgart Central Station

369x

30x

Membrane Roof

349x

23x

Tent Hall

Reinforced Concrete Column | Fire Resistance Design Check

241x

14x

Concrete Column | Fire Design Check

472x

70x

Cable Stabilized Mast

799x

Membrane Roofing of Sports Area

482x

21x

Membrane Structure

578x

34x

Membrane Roof

Knowledge Base Articles

This article explains how the cloud calculation works.

Figure 1: Wind Simulation on a Modern City Using RWIND

Compliance with building codes, such as Eurocode, is essential to ensure the safety, structural integrity, and sustainability of buildings and structures. Computational Fluid Dynamics (CFD) plays a vital role in this process by simulating fluid behavior, optimizing designs, and helping architects and engineers meet Eurocode requirements related to wind load analysis, natural ventilation, fire safety, and energy efficiency. By integrating CFD into the design process, professionals can create safer, more efficient, and compliant buildings that meet the highest standards of construction and design in Europe.

Sample of Porous Surface With Different Porosities (different porosity photo at top from © www.weathersolve.com)

In computational fluid dynamics (CFD), complex surfaces that are not completely solid can be modeled using porous or permeability media. In the actual world, examples of such things include windbreak fabric structures, wire meshes, perforated facades and claddings, louvers, tube banks (stacks of horizontal cylinders), and so on.

Windbreak Porous Fabric Structure in RFEM & RWIND

Windbreak structures are special types of fabric structures which protect the environment from harmful chemical particles, abate wind erosion, and help to maintain valuable sources. RFEM and RWIND are used for wind-structure analysis as one-way fluid-structure interaction (FSI). This article demonstrates how to structural design windbreak structures using RFEM and RWIND.

Screenshots

Output of Stresses, Graphically and Tabularly

Model 004737 | Masonry Building

Surfaces for interpolation zone constraint in RWIND

Selection of surfaces on which the interpolation in RWIND considers the experimental pressure

Cross-Section Conversion with Regular Expression

Model 004736 | Reinforced Concrete Building on Soil Model

Using Templates

Template Linked to Project in Dlubal Center

Dialog Box "Member Rotational Restraint", Tab "Discrete"

Dialog Box "Member Rotational Restraint", Tab "Manually"

Product Features

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

The Ponding load type allows you to simulate rain actions on multi-curved surfaces, taking into account the displacements according to the large deformation analysis.

This numerical rainfall process examines the assigned surface geometry and determines which rainfall portions drain away and which rainfall portions accumulate in puddles (water pockets) on the surface. The puddle size then results in a corresponding vertical load for the structural analysis.

For example, you can use this feature in the analysis of approximately horizontal membrane roof geometries subjected to rain loading.

Go to Explanatory Video

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
Additional 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 types "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

Mode Shape of Entire Model for Lateral-Torsional Buckling

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 is possible, for example for the 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)

Frequently Asked Questions (FAQ)

How can I create and edit a user-defined material from an existing material?

I would like to analyze temporary structures. Which programs do you recommend?

Which Dlubal programs do I need for tensile membrane structures?

I would like to analyze cable and tensile structures. Is it possible to use RFEM or RSTAB for this?

How do I create a user-defined fabric?

How can a model be regenerated, or where can I adjust the model tolerances?

Customer Projects

CP 001290 | Amphitheater Roof of Municipal Theater in Most | © Carl Stahl & spol. s r.o.

Amphitheater of Municipal Theater in Most, Czech Republic

CP 001287 | Aviary for Birds in Prague Zoo | © Carl Stahl & spol. s r.o.

Bird Aviary in Prague Zoo, Czech Republic

Retractable Steel-Tensile Dome with Diameter of 65.6 ft in Open Position by 90° (© Odo S&E)

Retractable Tensile Membrane Dome, France

Roofing of Sports Area at Multi-Purpose High School in North of Mayotte, Indian Ocean (© Normandie Structures)

Roofing of Sports Area at Multi-Purpose High School in North of Mayotte, France

Harzdrenalin Membrane Roof at Rappbode Dam in the Harz Mountains (© Ingenieurbüro Gisela Zündel)

Harzdrenalin Membrane Roof at Rappbode Dam in Harz Mountains, Germany

Apollo 11 Roadshow Tent at Night (© Matthew Churchill Productions Ltd.)

Lunar Dome, USA

Champagne Bar - Goodwood Racecourse, United Kingdom

Recreational Area Tension Membrane Structure in Châteauneuf-de-Galaure, France

RFEM Tennis Court Roof Model (© ACS Production)

Tennis Court Tension Membrane Roof in Belin-Béliet, France

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