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2022-08-12

CLT MIX and CLT T Calculation Principles and Proposed Modeling Using Dlubal Software

In the construction industry, where sustainability is becoming increasingly important, the utilization of timber takes on a leading role. Consequently, interest and investment have increased in R&D&I projects related to structural timber, which has led to products with special properties that allow timber to compete with other materials, such as concrete or steel.

Author	Andoni Martin Sanz
University	University of the Basque Country - San Sebastian University of Architecture, Spain

Proposal of CLT MIX

This frenetic race to create new structural elements has a problem: the difficulty in finding modeling tools for these elements, which are more unique by nature than those with more entrenched industrialization.

The intention of this thesis is to propose the modeling of some of these products, such as CLT MIX and CLT T, using Dlubal Software modular software.

Downloads

Graduation Thesis 000458 | CLT MIX and CLT T Calculation Principles and Proposed Modeling Using Dlubal Software

7.41 MB

Do you have any questions?

Events

2024-08-15

$Design of Timber Panel Walls in \n RFEM 6$

Webinar

Design of Timber Panel Walls in RFEM 6

2024-11-20

Online Training

RFEM 6 | Students | Introduction to Timber Design

Videos

Customer Project

CP 001173 | CLT Residential Building in Girona, Spain

Length: 00:00:11 min

Event

Webinar | Fire Resistance Design of Timber Structures in RFEM 6

Length: 01:06:40 min

Event

Webinar | CSA O86:19 CLT Building Design in RFEM 6

Length: 01:04:39 min

RFEM 6 for Students | Introduction to Timber Design

Event

RFEM 6 for Students | Introduction to Timber Design | April 30, 2024

Length: 01:08:02 min

FAQ

FAQ 005494 | How can I model a timber beam with stiffening on both sides? (splice)

Length: 00:01:22 min

Product Feature

Fire Resistance Design of Surfaces for EN 1995, SIA 265, NDS, and CSA O86

Length: 00:00:56 min

Event

Webinar | Timber Floor Calculations in RFEM 6

Length: 00:55:27 min

Event

RFEM 6 for Students | Introduction to Timber Design | November 29, 2023

Length: 01:10:03 min

Product Feature

Cross‑Section Optimization

Length: 00:00:56 min

Playlist

Models to Download

858x

56x

CLT Panel

Thesis on CLT Building by Miryea Alfano, Italy

749x

Timber and Concrete Building

1718x

CLT Residential Building

1168x

Wall Element Made of Cross-Laminated Timber (CLT)

RFEM Model of Timber Residential Building

4641x

416x

Residential Building of Cross-Laminated Timber

Model 005014 | Extension Made of Flat Timber Components

57x

12x

Extension Made of Flat Timber Components

Model 5015 | Timber Column Subjected to Fire Exposure

49x

Timber Column Under Fire Exposure

Model 5016 | Ceiling on Downstand Beams Subjected to Fire Exposure

45x

11x

Floor on Downstand Beams Under Fire Exposure

52x

22x

Timber Frame Studio

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.

The vibration design of cross‑laminated timber plates often governs for wide-span ceilings. The advantage of timber as a lighter material compared to concrete is turned into a disadvantage here, since a high mass is advantageous for a low natural frequency.

In this article, the calculation of a timber panel wall with the beam panel thickness type is compared with a manual calculation.

KB 001848 | Timber Column Design as per the 2018 NDS Standard in RFEM 6

Using the Timber Design add-on, timber column design is possible according to the 2018 NDS standard ASD method. Accurately calculating timber member compressive capacity and adjustment factors is important for safety considerations and design. The following article will verify the maximum critical buckling strength calculated by the Timber Design add-on using step-by-step analytical equations as per the NDS 2018 standard including the compressive adjustment factors, adjusted compressive design value, and final design ratio.

Screenshots

Proposal of CLT MIX

Timber Beam Ceiling

Hall

Stability of Arch Structure

Timber Arch Structure

Timber Building

3D CAD Model (© Egoin)

3D Model of Residential Building in RFEM (© Egoin)

Product Features

Feature 002824 | OSB Material for USA and Canada

In RFEM, the oriented strand board (OSB) material is available for the USA and Canada. The material parameters are taken from the "Panel Design Specification manual".

Using the "Beam Panel" thickness type, you can model timber panel elements in 3D space. Simply specify the surface geometry and the timber panel elements are automatically generated using an internal member-surface construct, including the element connection stiffness. The Beam Panel thickness type is defined using the Multilayer Surfaces add-on.

A "beam panel" provides you with the following advantages:

Single-sided or double-sided sheathing
Automatic calculation of a semi-rigid coupling between studs and sheathing
- Nailed sheathing connection
- Stapled sheathing connection
- User-defined sheathing connection
Representation as a complete geometric 3D object (frame, studs, surface, etc.), including eccentricity and automatically calculated stiffness between elements
Consider openings via surface cells
Design of the individual structural elements utilizing the Timber Design add-on (full shear wall design planned for a future release)
Other material options available (e.g., particle board, gypsum, or fiberboard sheathing with cold-formed steel sections)

Go to Explanatory Video

Feature 002585 | Fire Resistance Design of Surfaces for EN 1995 and SIA 265

You have the option to perform the fire resistance design of surfaces using the reduced cross-section method. The reduction is applied over the surface thickness. It is possible to perform the design checks for all timber materials allowed for the design.

For cross-laminated timber, depending on the type of adhesive, you can select whether it is possible for individual carbonized layer parts to fall off, and whether you can expect increased charring in certain layer areas.

Go to Explanatory Video

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 can the NDS and CSA O86 factors be manually adjusted for consideration in the Timber Design add-on?

What calculation is carried out for the NDS Strength Configuration "Calculation of Torsion" options?

Which Dlubal software products do you recommend for the structural analysis and design of timber structures in particular?

How can I model a timber beam with stiffening on both sides? (splice)

How can I generate an area load on members via cells in RFEM 6 or RSTAB 9?

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

Customer Projects

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

CLT Residential Building in Girona, Spain

Timber Truss Girders and Glued-Laminated Timber Decking (© Holz Albertani SpA)

Timber Roof of Shopping Mall, Italy

Olympic Games 2024: Student Residence Building PE2 Made of Timber Modules in Saint-Denis, France

Olympic Games 2024: Reversible R+4 Composite Timber/Concrete Building in Saint-Denis, France

Laboratory Building in Garching near Munich, Germany

Structural Diagnosis and Design of Existing Timber Structure © Xavier Bueno Llasat

Structural Diagnosis and Design of Existing Timber Structure in Soria, Spain

Olympic Games 2024: Composite Timber/Concrete Building PB9 in Saint-Denis, France

Better Energy Charging Station, Denmark

Metz Gym as Showcase of Engineering and Sustainability in Modern Construction, Metz, France

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