Project

Back to overview

Reliable timber and innovative wood products for structures - Structural elements of wood and wood products made of beech

Applicant Frangi Andrea
Number 136636
Funding scheme NRP 66 Resource Wood
Research institution Institut für Baustatik und Konstruktion ETH Zürich
Institution of higher education ETH Zurich - ETHZ
Main discipline Civil Engineering
Start/End 01.01.2012 - 31.12.2016
Approved amount 569'531.00
Show all

Keywords (12)

Reliability; Laminated veneer lumber LVL; Structures; Structural Engineering; Fire safety; Bonding; Mechanical properties; Design; Beech; Wood; Connections; Timber

Lay Summary (German)

Lead
Neuartige, zuverlässige Tragwerke aus Buchenholz Buchenholz wird bisher vor allem als Energieholz genutzt. In diesem Projekt geht es darum, neuartige, hochwertige und zuverlässige Tragwerke aus Buchenholz zu entwi-ckeln, für die Praxis nutzbar zu machen, und so der Vision eines Baustoffes "stark und zuverlässig wie Stahl und nachhaltig wie Holz" näher zu kommen.
Lay summary

Hintergrund
Fehlerfreies Holz hat sehr gute mechanische und thermische Eigenschaften: Es ist sehr fest, hat ein geringes Gewicht und eignet sich gut zur Wärmedämmung. Doch durch den natürli-chen Wuchs entstehen auch Schwächen, welche sich für Holzbauteile als tragende Elemente im konstruktiven Bereich negativ auswirken und die Zuverlässigkeit von Holzbauteilen verringern. Das Projekt liegt in der strategischen Ausrichtung der Forschenden zur Entwick-lung von effizienten und zuverlässigen Tragwerken aus Holz.

Ziel
Ziel des Projekts ist es, neuartige, hochwertige und zuverlässige Tragwerke aus Buchenholz zu entwickeln und für die Praxis nutzbar zu machen. Im Vordergrund des Projektes steht Furnierschichtholz (LVL) aus Buche. Dafür bestimmen die Forschenden zunächst die Materialeigenschaften genau, entwickeln neuartige und hochwertige Verbindungen und erarbeiten Berechnungsgrundlagen für Verbindungen und Bauteile.

Bedeutung
Buchenholz verfügt über sehr gute mechanische Materialeigenschaften, wird jedoch bisher primär als Energieholz genutzt. Das Forschungsprojekt liefert die Grundlagen zur Anwendung von Buchenholz im Ingenieurholzbau und steigert dadurch den Absatz und die Wert-schöpfung von Buchenholz.

Direct link to Lay Summary Last update: 25.01.2013

Lay Summary (French)

Lead
Nouveaux types de structures porteuses de haute fiabilité en bois de hêtre Jusqu’à présent, le bois de hêtre était principalement utilisé comme bois-énergie. L’enjeu de ce projet est de développer de nouveaux types de structures porteuses en bois de hêtre, de haute fiabilité et de qualité supérieure, en se rapprochant d’un matériau idéal qui possèderait la "résistance et la fiabilité de l’acier et la durabilité du bois".
Lay summary

Contexte
Un bois sans défaut présente d’excellentes propriétés mécaniques et thermiques: très solide et léger, c’est un bon isolant thermique. Mais, au cours de sa croissance naturelle, il est susceptible de développer des faiblesses, préjudiciables à la fiabilité, et donc à l’utilisation des composants en bois comme éléments porteurs dans le domaine de la construction. Ce projet s'inscrit dans la stratégie des chercheurs de mettre au point des structures porteuses en bois efficaces et fiables.

But
Ce projet a pour objectif de développer de nouveaux types de structures porteuses en bois de hêtre, de haute fiabilité et de qualité supérieure, en vue d’exploitations pratiques. Le bois de hêtre en placage stratifié est au cœur du projet. Les chercheurs commencent par déterminer avec précision les propriétés du matériau, développent de nouveaux types d’assemblage de qualité supérieure et élaborent des bases de calcul pour les assemblages et éléments structurels.

Portée
Bien que le bois de hêtre possède de très bonnes propriétés mécaniques, il est à ce jour principalement utilisé comme bois-énergie. Le projet de recherche fournit la base d’une utilisation du bois de hêtre dans l’ingénierie de la construction en bois, dans l’optique d’augmenter les ventes de bois de hêtre et la création de valeur à partir de ce matériau.

Direct link to Lay Summary Last update: 25.01.2013

Lay Summary (English)

Lead
Innovative and reliable structures made of beech wood Beech wood has been mainly used as energy wood so far. This project aims to develop innovative and reliable structures of high quality out of beech wood and make them ready for use in the practical realm. In so doing, it hopes to come close to realising the vision of a building material that is "as strong and reliable as steel and as sustainable as wood".
Lay summary

Background
Immaculate wood has very good mechanical and thermal qualities: it is very hard, but not heavy, and is suitable for insulation. However, natural growth can also cause weaknesses that have a negative effect on wooden elements of structures in construction work and reduce their reliability. The project follows the strategic thrust of the researchers, which is to develop efficient and reliable wooden structures.

Aim
The aim of the project is to develop innovative and reliable beech wood structures of high quality and to make them available for construction work. The project focuses on laminated veneer lumber (LVL) made of beech wood. To start with, the researchers precisely identify the material properties, develop new, high-quality joints and devise a basis for calculating joints and building elements.

Significance
Although beech wood has very good mechanical properties, it has so far been used primarily as energy wood. This research project lays the foundation for the use of beech wood in timber engineering, thereby increasing the sales potential and added value of beech.

Direct link to Lay Summary Last update: 25.01.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
Analysis of shear transfer and gap opening in timber–concrete composite members with notched connections
Boccadoro Lorenzo, Steiger René, Zweidler Simon, Frangi Andrea (2017), Analysis of shear transfer and gap opening in timber–concrete composite members with notched connections, in Materials and Structures, 50(5), 231-231.
Bending tests on timber-concrete composite members made of beech laminated veneer lumber with notched connection
Boccadoro Lorenzo, Zweidler Simon, Steiger René, Frangi Andrea (2017), Bending tests on timber-concrete composite members made of beech laminated veneer lumber with notched connection, in Engineering Structures, 132, 14-28.
Fire tests on timber-concrete composite slabs using beech laminated veneer lumber
Klippel Michael, Boccadoro Lorenzo, Klingsch Eike, Frangi Andrea (2016), Fire tests on timber-concrete composite slabs using beech laminated veneer lumber, in WCTE 2016 - World Conference on Timber Engineering.
Timber trusses made of European beech LVL
Kobel Peter, Frangi Andrea, Steiger René (2016), Timber trusses made of European beech LVL, in WCTE 2016 - World Conference on Timber Engineering.
Timber-concrete composite slabs made of beech laminated veneer lumber
Boccadoro Lorenzo, Zweidler Simon, Frangi Andrea (2016), Timber-concrete composite slabs made of beech laminated veneer lumber, in WCTE 2016 - World Conference on Timber Engineering.
Brandverhalten von Holz-Beton-Verbunddecken aus Buchenholz
Klingsch Eike, Klippel Michael, Boccadoro Lorenzo, Frangi Andrea, Fontana Mario (2015), Brandverhalten von Holz-Beton-Verbunddecken aus Buchenholz, in BAUTECHNIK, 92(5), 323-329.
Dynamic response of an innovative hybrid structure in hardwood
Leyder Claude Wanninger Flavio Frangi Andrea Chatzi Eleni (2015), Dynamic response of an innovative hybrid structure in hardwood, in Proceedings of Institution of Civil Engineers: Construction Materials, 168(3), 132-143.
Experimentelle Untersuchungen zum Tragverhalten von Holz-Beton-Verbunddecken aus Buche
Boccadoro Lorenzo, Frangi Andrea (2015), Experimentelle Untersuchungen zum Tragverhalten von Holz-Beton-Verbunddecken aus Buche, in Bautechnik, 92(11), 783-789.
L‘evoluzione tecnologica applicata: un edificio del Politecnico Federale
Frangi Andrea (2015), L‘evoluzione tecnologica applicata: un edificio del Politecnico Federale.
Les hautes performances du feuillu et du hêtre
Frangi Andrea Leyder Claude (2015), Les hautes performances du feuillu et du hêtre.
Mit Laubholz zu höheren Leistungen
Frangi Andrea Steiger René (2015), Mit Laubholz zu höheren Leistungen.
Un prototype en bois de hêtre: 4 étages de bureaux pour l'EPF de Zurich
Leyder Claude Frangi Andrea (2015), Un prototype en bois de hêtre: 4 étages de bureaux pour l'EPF de Zurich.
Decken- und Rahmensysteme aus Laubholz - ETH House of Natural Resources
Frangi Andrea (2014), Decken- und Rahmensysteme aus Laubholz - ETH House of Natural Resources.
Dowel-type Connections in LVL Made of Beech Wood
Kobel Peter Frangi Andrea Steiger René (2014), Dowel-type Connections in LVL Made of Beech Wood, in Proceedings of 1st INTER Meeting, Karlsruhe.
Experimental Analysis of the Structural Behavior of Timber-Concrete Composite Slabs made of Beech-Laminated Veneer Lumber
Boccadoro Lorenzo, Frangi Andrea (2014), Experimental Analysis of the Structural Behavior of Timber-Concrete Composite Slabs made of Beech-Laminated Veneer Lumber, in JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES, 28(6), A4014006.
Experimental Analysis on the Structural Behaviour of Connections with LVL Made of Beech Wood
Kobel Peter, Steiger René, Frangi Andrea (2013), Experimental Analysis on the Structural Behaviour of Connections with LVL Made of Beech Wood, in RILEM Conference on Materials and Joints in Timber Structures – Recent Advancement of Technology, Stuttgart.
Flachdecken aus Holz
Boccadoro Lorenzo Frangi Andrea (2013), Flachdecken aus Holz.
Holz-Beton-Verbunddecke aus Buche
Frangi Andrea Boccadoro Lorenzo (2013), Holz-Beton-Verbunddecke aus Buche.
Stark und zuverlässig wie Stahl
Frangi Andrea Boccadoro Lorenzo Leyder Claude (2013), Stark und zuverlässig wie Stahl, in Wir Holzbauer, (1), 12-15.

Collaboration

Group / person Country
Types of collaboration
Empa Dübendorf, Abteilung Holz Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Lignum, Holzwirtschaft Schweiz, Zürich Switzerland (Europe)
- Industry/business/other use-inspired collaboration
Pollmeier Massivholz GmbH, Creuzburg Germany (Europe)
- Industry/business/other use-inspired collaboration
ETH Zürich, Institut für Baustoffe Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Neue Holzbau AG, Lungern Switzerland (Europe)
- Industry/business/other use-inspired collaboration
Walt+Galmarini AG, Zürich Switzerland (Europe)
- Industry/business/other use-inspired collaboration
Hess & Co., Döttingen Switzerland (Europe)
- Industry/business/other use-inspired collaboration
Purbond AG, Sempach-Station Switzerland (Europe)
- Industry/business/other use-inspired collaboration
MWV Bauingenieure AG, Baden Switzerland (Europe)
- Industry/business/other use-inspired collaboration
Pirmin Jung AG, Rain Switzerland (Europe)
- Industry/business/other use-inspired collaboration
Implenia Holzbau AG, Rümlang Switzerland (Europe)
- Industry/business/other use-inspired collaboration
Empa Dübendorf, Brandlabor Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Häring AG, Eiken Switzerland (Europe)
- Industry/business/other use-inspired collaboration
ETH Zürich, Professur für Architektur und Digitale Fabrikation Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
World Conference on Timber Engineering (WCTE) 2016 Talk given at a conference Mini-symposia on Innovative wood construction and materials at the ETH house of natural resources 22.08.2016 Wien, Austria Kobel Peter; Boccadoro Lorenzo; Frangi Andrea;


Self-organised

Title Date Place
Montagskolloquien für die Praxis: Verklebung und Einsatz von Laubholz und Ingenieurholzbau 09.12.2013 ETH Zürich, Switzerland

Knowledge transfer events



Self-organised

Title Date Place
Tagung: Von der Forschung zur Praxis: neue Lösungen für den Holzbau 30.01.2017 ETH Zürich, Switzerland
47. Fortbildungskurs, Moderner Massivbau aus Holz - vom Einfamilienhaus bis zum Hochhaus, Swiss Wood Innovation Network S-WIN 20.10.2015 Weinfelden, Switzerland
45. Fortbildungskurs: Deckensysteme, Aktuelle und zukünftige Lösungen mit Holz, Swiss Wood Innovation Network S-WIN 22.10.2013 Weinfelden, Switzerland
Hybridbau Tagung 04.06.2013 ETH Zürich, Switzerland

Communication with the public

Communication Title Media Place Year
Talks/events/exhibitions Holzbau Kompakt International 2015
Talks/events/exhibitions IBK Kolloquium Western Switzerland 2015
Talks/events/exhibitions ETH Alumni Veranstaltung German-speaking Switzerland 2013
Talks/events/exhibitions Prix Lignum German-speaking Switzerland 2013
Talks/events/exhibitions Top Programm Holz German-speaking Switzerland 2013

Awards

Title Year
ETH House of Natural Resources: Prix Lignum für Laubholz 2015
ETH House of Natural Resources: Schweighofer Innovationspreis 2015

Use-inspired outputs


Start-ups

Name Year

Abstract

Research topic and objective of the project:Timber as natural resource is highly complex due to its anisotropic nature and natural inhomogeneities. The mechanical and physical properties are influenced by duration of load, moisture and temperature. As a consequence, the reliability of structural timber elements is often inadequate and the full potential of timber in the building and construction sector has not been exploited yet. The project aims at developing sustainable innovative and reliable timber structures using laminated veneer lumber (LVL) made of beech wood. Particular attention will be paid to the reliable characterisation of the mechanical and thermo-physical properties of beech LVL, the development of reliable, efficient and economic connections and the development of safe and economic design methods for elements and connections. Main tasks:• To define the performance requirements to be fulfilled by LVL made of beech.• To quantify the importance and incertitude of model- and material-related parameters being decisive for the design of LVL structural elements made of beech.• To perform an extensive experimental investigation and numerical parametric studies using the finite element approach for the accurate and reliable characterisation of the fundamental mechanical and thermo-physical material properties of beech and LVL structural elements made of beech.• To develop reliable, efficient and economic connections for LVL structural elements made of beech using new technologies (e.g. advanced digital fabrication techniques).• To develop accurate, safe and economic advanced calculation models for the design of LVL structural elements made of beech and to verify their adequate reliability.• To develop sustainable innovative and reliable timber structures using LVL structural elements made of beech.Benefits of the project:The research project will provide unmatched knowledge about the mechanical and thermo-physical properties as well as the structural behaviour of LVL made of beech wood. The development of sustainable innovative and reliable timber structures and connections using LVL made of beech will lead to an increased application of the up to now insufficiently used species beech as building material and will significantly improve the substitution potential of wood as a high-performing and reliable construction material.
-