876x

2015-04-29

RF-LAMINATE | Input

It is necessary to select load cases, load combinations, and result combinations for the ultimate and the serviceability limit state design. After selecting the surfaces to be designed, you can define the relevant material model.

The structure of layers forming the basis for the stiffness calculation can vary. You can adjust the parameters defined by the selected material model according to your individual needs. The 3*3 matrix of the layers is modifiable as well. In this way completely free selection when generating the stiffnesses is provided.

The limit stresses of each layer are defined by the selected material. These values can be customized as well.

Elements of Extended Stiffness Matrix

Do you have any questions?

Events

2024-04-24

Online Training

RFEM 6 | Students | Introduction to FEM

2024-04-25

Stiffening Design in RFEM 6 Using Building Model

Webinar

Stiffening Design in RFEM 6 Using Building Model

2024-04-25

AISC 360-22 Steel Connection Design in RFEM 6

Webinar

AISC 360-22 Steel Connection Design in RFEM 6 (USA)

2024-04-30

Online Training

RFEM 6 | Students | Introduction to Timber Design

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

2024-05-08

$Cross-Section Modeling and \n Stress Analysis in RSECTION 1$

Webinar

Cross-Section Modeling and Stress Analysis in RSECTION 1

2024-05-15

Online Training

RFEM 6 | Students | Introduction to Steel Design

2024-05-16

Consideration of Construction Stages in RFEM 6

Webinar

Consideration of Construction Stages in RFEM 6

2024-05-23

Most Frequently Asked Questions Answered by Dlubal Support Team

Webinar

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

2024-05-29

$Steel Structures in RFEM 6 \n Part 1: Modeling, Load Input$

Webinar

Modeling and Design of Steel Structures in RFEM 6 | Part 1: Modeling, Load Input

2024-06-06

$Steel Structures in RFEM 6 \n Part 2: Combinations, Design, Documentation$

Webinar

Modeling and Design of Steel Structures in RFEM 6 | Part 2: Combinations, Design, Documentation

Videos

Customer Project

CP 001182 | Passive House Made of Timber in Lugo, Spain

Length: 00:00:00 min

Customer Project

CP 001173 | CLT Residential Building in Girona, Spain

Length: 00:00:11 min

Event

Webinar | 2018 NDS CLT Design in RFEM 6

Length: 00:00:00 min

Knowledge Base

KB 001772 Defining Multilayer Surfaces in RFEM 6

Length: 00:00:50 min

Knowledge Base

KB 000689 | Modeling of Cross-Laminated Timber Structures - Connections

Length: 00:00:22 min

Knowledge Base

KB 000711 | Modeling Cross-Laminated Timber Structures - Supports

Length: 00:00:27 min

FAQ

[EN] FAQ 004938 | Why are the stresses of the 90° orientation not displayed for a layer with the orthotropy ...

Length: 00:00:47 min

Knowledge Base

KB 000799 | User-Defined Colors and Textures for Layer Compositions

Length: 00:00:25 min

Customer Project

CP 001191 | Diemerstein Valley - Free Form

Length: 00:00:00 min

Playlist

Models to Download

Thesis on CLT Building by Miryea Alfano, Italy

710x

Timber and Concrete Building

1649x

CLT Residential Building

RFEM Model of Water Sports Center (© Kmod Enginyeria en Fusta SL)

1074x

Cross-Laminated Timber Building

1129x

Wall Element Made of Cross-Laminated Timber (CLT)

RFEM Model of Timber Residential Building

4507x

395x

Residential Building of Cross-Laminated Timber

Model 004809 | Cross-Laminated Timber Building

342x

49x

Cross-Laminated Timber Building

Model 004707 | Office Building of Municipal Works in Kirchheim unter Teck, Germany

262x

Office Building Timber Structure with Reinforced Concrete Elements

180x

Slab

236x

10x

Neoprene Support

Knowledge Base Articles

Influence of Duration of Action on Design Value of Strength

In addition to determining loads, some particularities concerning the load combinatorics in timber design have to be considered. Contrary to steel structures, where the largest loading results from all unfavorable actions, in timber construction, the strength values depend on the load duration and timber humidity. Special characteristics have to be considered as well for the serviceability limit state design. The following article discusses the effects on the design of wooden elements and how this is possible with RSTAB and RFEM.

"Multilayer Surfaces” Add-on in the Base Data

In RFEM 6 it is possible to define multilayer surface structures with the help of the “Multilayer Surfaces” add-on. Hence, if you have activated the add-on in the model’s Base Data, it is possible to define layer structures of any material model. You can also combine material models of, for example, isotropic and orthotropic materials.

Modeling Cross-Laminated Timber Structures

The support of the cross-laminated timber panel deserves special attention. Usually, a cross‑laminated wall is secured against shearing by means of shear connectors and against lifting forces by means of tie rods.

One of the advantages of entering the structure in RFEM is the complete freedom when selecting the geometry. You can easily select a structure where re‑entrant rolling corners are given as shown in the image.

Screenshots

Elements of Extended Stiffness Matrix

Structure of Circular Domed House in RFEM 5

Deformation of Frame of the Structure (© ARTEMIS INGENIEUR)

Hinges of Members for Roof and Floors (© ARTEMIS INGENIEUR)

General Structure View (© ARTEMIS INGENIEUR)

RFEM Model | Thesis by Miryea Alfano, CLT Building, Italy

Timber Beam Ceiling

Hall

Stability of Arch Structure

Product Features

General stress analysis
Graphical and numerical results of stresses and stress ratios fully integrated in RFEM
Flexible design with different layer compositions
High efficiency due to few entries required
Flexibility due to detailed setting options for basis and extent of calculations
A local overall stiffness matrix of the surface in RFEM is generated on the basis of the selected material model and the layers contained. The following material models are available:
- Orthotropic
- Isotropic
- User-defined
- Hybrid (for combinations of material models)
Option to save frequently used layer structures in a database
Determination of basic, shear, and equivalent stresses
In addition to the basic stresses, the required stresses according to DIN EN 1995-1-1 and the interaction of those stresses are available as results.
Stress analysis for structural surfaces including simple or complex shapes
Equivalent stresses calculated according to different approaches:
- Shape modification hypothesis (von Mises)
- Shear stress hypothesis (Tresca)
- Normal stress hypothesis (Rankine)
- Principal strain hypothesis (Bach)
Calculation of transversal shear stresses according to Mindlin or Kirchhoff, or user-defined specifications
Serviceability limit state design by checking surface displacements
User-defined specifications of limit deflections
Possibility to consider layer coupling
Detailed results of individual stress components and ratios in tables and graphics
Results of stresses for each layer in the model
Parts list of designed surfaces
Possible coupling of layers entirely without shear

After the calculation, the maximum stresses, stress ratios, and displacements are displayed by load case, surface, or grid points. The design ratio can be related to any kind of stress type. The current location is highlighted by color in the RFEM model.

In addition to the result evaluation in tables, it is possible to display the stresses and stress ratios graphically in the RFEM work window. For this, you can adjust the colors and values assigned in the panel.

The limit stresses of each layer are defined by the selected material. These values can be customized as well.

Feature 002615 | Cross-Laminated Timber Manufacturer Library for USA, Canada, and Switzerland

Among others, the following cross-laminated timber manufacturers are available in the layer structure library:

Binderholz (USA)
KLH (USA, CAN)
Kalesnikoff (USA, CAN)
Nordic Structures (USA, CAN)
Mercer Mass Timber
SmartLam
Sterling Structural
Superstructures listed in Lignatec Edition 32 "Cross-Laminated Timber of Swiss Production"

By importing a structure from the layer structure library, all relevant parameters are adopted automatically. The library is continually updated.

Frequently Asked Questions (FAQ)

How is it possible to display the RF‑LAMINATE library? We would like to check that it is up to date.

How is coupling between individual layers controlled in the RF‑LAMINATE add-on module?

Which programs do I need for laminate and sandwich structures, or cross-laminated timber (CLT)?

Which Dlubal Software programs can I use to calculate and design timber structures?

How does the "Orthotropic Plastic" material model work in RFEM?

Why are the stresses of the 90° orientation not displayed for a layer with the orthotropy direction 90° for σ_b,90 in RF‑LAMINATE?

Customer Projects

Study of Circular Domed House, Canada

Completed Residential Building (© Maderas Besteiro)

Passive House Made of Timber in Lugo, Spain

CLT Residential Building Under Construction in Girona, Spain (© Egoin)

CLT Residential Building in Girona, Spain

Spiral Staircase in KF Aerospace Centre for Excellence, Canada

Production and Trading Company in Pians, Austria

Bell Tower in Bleibach, Germany

Model of Collegium Academicum Dormitory and Education Center in Heidelberg, Germany (© DGJ Architektur GmbH)

Collegium Academicum - Dormitory in Heidelberg, Germany

Timber Pavilion at Technical University of Kaiserslautern (© PIRMIN JUNG)

Diemersteiner Tal - Free Form, Germany

Water Sports Center, Formentera, Spain

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