1104x

2020-12-07

Design and Calculation of Lightweight Framework House

The master thesis deals with the structural design and analysis of a lightweight timber framework house. This structural system has a stability against lateral forces due to the diaphragm effect generated by the reinforcement panels in walls, floors, and the roof.

Author	Kostka García
University	University of the Basque Country, Spain Master's Degree in Timber Construction and Design

A model was created in RFEM to design the linear elements. This model includes the posts of the wall frame, its upper beam as well as the floor and ceiling joists, and the main glued laminated timber girders. After including all the load cases according to the relevant standard, all supports have been designed with RF‑/TIMBER Pro.

Finally, to analyze the entire stability, a model was created where the framework boards are replaced by diagonal bars and the stiffness equivalent to the shear stiffness of the boards is applied. By applying the relevant loads corresponding to the destabilizing actions, such as wind, on the model, a very appropriate representation of what would be the real deformations of the building constructed by the framework panels can be obtained.

Downloads

Thesis Presentation

1.74 MB

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Videos

Knowledge Base

KB 000694 | "Simplified" Vibration Design for EC 5

Length: 00:01:17 min

FAQ

FAQ 004977 | Can I consider a reduction of the stiffness according to the German regulation NCI ...

Length: 00:00:22 min

FAQ

[EN] FAQ 004971 | I have selected all members available for design in RF‑/TIMBER Pro. Why…

Length: 00:00:42 min

FAQ

[EN] FAQ 004969 | When performing the fire resistance design with TIMBER Pro, I get the error…

Length: 00:01:03 min

FAQ

[EN] FAQ 004942 | After the design was performed using RF‑/TIMBER Pro, I optimized a cross-section ...

Length: 00:00:44 min

Knowledge Base

KB 000587 | Optimizing Cross-Sections

Length: 00:01:02 min

Customer Project

CP 001184 | "Terma Bania" Building Extension and Renovation in Białka Tatrzańska, Poland

Length: 00:00:06 min

Knowledge Base

KB 001669 | Lateral-Torsional Buckling in Timber Construction | Examples 2

Length: 00:02:15 min

General

Trailer: Structural Timber with Dlubal Software

Length: 00:00:00 min

Playlist

Models to Download

1624x

288x

Lightweight Framework House

3D Model of Pavilion in RSTAB (© Blumer-Lehmann AG)

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Pavilion Made of Laminated Veneer Lumber

609x

47x

Timber Beam

994x

82x

Three-Span Continuous Beam

1025x

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Truss Girder

Single-Span Beam with Lateral and Torsional Restraint and Without Intermediate Lateral Restraints

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53x

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3191x

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Knowledge Base Articles

With the RF-/TIMBER Pro add-on module, you can perform the vibration design known from DIN 1052 for the design according to EN 1995-1-1. In this design, the deflection under permanent and quasi-permanent action at the ideal one‑span beam may not exceed the limit value (6 mm according to DIN 1052). If you consider the relation between the natural frequency and the deflection for a hinged single-span beam subjected to a constant distributed load, the 6 mm limit value results in a minimum natural frequency of about 7.2 Hz.

In the course of a reasonable pre-dimensioning of cross-sections, you can optimize the cross-sections of the corresponding section series in the RF‑/TIMBER Pro add-on module.

The previous article, titled Lateral-Torsional Buckling in Timber Construction | Examples 1, explains the practical application for determining the critical bending moment M_crit or the critical bending stress σ_crit for a bending beam's lateral buckling using simple examples. In this article, the critical bending moment is determined by considering an elastic foundation resulting from a stiffening bracing.

The calculation of timber panels is carried out on simplified member or surface structures. This article describes how to determine the required stiffness.

Screenshots

Lightweight Framework House

RFEM Model (© WIEHAG)

Image of Tree Tower (© WIEHAG)

3D Model of Pavilion in RSTAB (© Blumer-Lehmann AG)

Drawing of Building for Mounting (© Albert Admetla - VELIMA)

Interior of Building Under Construction (© Estudi M103)

Virtual Representation of Residential Building (© Estudi M103)

Corner View of "Cirerers" Building Under Construction (© Estudi M103)

Product Features

Using the "Beam Panel" thickness type, you can model timber panel elements in 3D space. You just specify the surface geometry and the timber panel elements are generated using an internal member-surface construct, including the simulation of the connection flexibility.

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.

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.

The Timber Design add-on for RFEM 6 / RSTAB 9 is multi-purpose and combines a large number of additional elements. [*S16332764*] Timber Design Add-on for RFEM 6

Frequently Asked Questions (FAQ)

Can I use RFEM to calculate a log house three-dimensionally?

I would like to carry out the flexural buckling design for timber components with imperfections and internal forces according to the second-order analysis. Is it sufficient to activate this in Details of the RF‑/TIMBER Pro add-on module or is it necessary to make additional settings?

Can I design laminated veneer lumber with RFEM 5 or RSTAB 8?

When performing the fire resistance design with TIMBER Pro, I get Error 10001. How can I fix the error?

I have selected all the members available for design in RF‑/TIMBER Pro. Why are the tapered members not designed?

Can I consider a reduction of the stiffness according to the German regulation NCI NA.5.9 in TIMBER Pro?

Customer Projects

King Louis Bridge, Kempten, Germany | © Konstruktionsgruppe Bauen AG

King Louis Bridge in Kempten, Germany

Lookout Tower with Treetop Walkway in Avondale Forest, Ireland

Three "Trees" of Pavilion Project (© Blumer-Lehmann AG)

Pavilion Project "Into the Woods" in Denmark

Visualization of Sports Hall (© [pfitzner moorkens] architects)

Sports Hall as Cantilevered Timber Structure, Germany

Cirerers, Spain's Tallest Wooden Residential Building (© Estudi M103)

Cirerers, Spain's Tallest Wooden Residential Building (Barcelona)

"Terma Bania" Building Extension and Renovation in Białka Tatrzańska, Poland

St. Josef Parish Church in Holzkirchen, Germany

Lookout Tower with View over Krkonoše Mountains (© Erlebnis Akademie AG)

Krkonoše Lookout Tower, Czech Republic

3D Model and Buckling Shape of Lookout Tower in RSTAB (© WIEHAG GmbH)

Lookout Tower at Treetop Path, Steigerwald

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