Application of European design principles to cross laminated timber

Gerhard Fink, Jochen Kohler, Reinhard Brandner

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The design of cross laminated timber (CLT) structures is not included in the current version of European structural timber design standards of EN 1995 (Eurocode 5, EC 5). Due to the increasing importance of CLT, in different applications such as complete wall or floor elements as well as girders, it is one of the main goals of the currently ongoing revision of EC 5 to provide design principles for CLT structures. In the present paper some general aspects, relevant for the implementation of CLT in European standards in order to be consistent with the general philosophy of the Eurocodes are summarized and discussed. The differences between standard test specimens and structural components as well as the uncertainties related to the production procedure of CLT and the non-standardized test procedure are discussed. An investigation of 12 different test series from five different producers clearly indicates a large variation between different production series. Based on the investigation from the test series a reliability analysis is performed. The results indicate that the same partial safety factor as recommended for glued laminated timber (GLT) is appropriate in order to achieve an acceptable reliability. However, the analysis also indicates the potential for a smaller partial safety factor in the future, in case that the production of CLT is standardized and appropriate standardized test methods for the individual material properties exist.

Original languageEnglish
Pages (from-to)934-943
JournalEngineering Structures
Volume171
DOIs
Publication statusPublished - Sep 2018

Fingerprint

Timber
Safety factor
Beams and girders
Reliability analysis
Materials properties

Keywords

  • Cross laminated timber
  • Partial safety factor
  • Structural reliability
  • Variability of the materiel properties

ASJC Scopus subject areas

  • Civil and Structural Engineering

Fields of Expertise

  • Sustainable Systems

Cite this

Application of European design principles to cross laminated timber. / Fink, Gerhard; Kohler, Jochen; Brandner, Reinhard.

In: Engineering Structures, Vol. 171, 09.2018, p. 934-943.

Research output: Contribution to journalArticleResearchpeer-review

@article{4b8d3d1e6ca14162a0c00f948dd64c1f,
title = "Application of European design principles to cross laminated timber",
abstract = "The design of cross laminated timber (CLT) structures is not included in the current version of European structural timber design standards of EN 1995 (Eurocode 5, EC 5). Due to the increasing importance of CLT, in different applications such as complete wall or floor elements as well as girders, it is one of the main goals of the currently ongoing revision of EC 5 to provide design principles for CLT structures. In the present paper some general aspects, relevant for the implementation of CLT in European standards in order to be consistent with the general philosophy of the Eurocodes are summarized and discussed. The differences between standard test specimens and structural components as well as the uncertainties related to the production procedure of CLT and the non-standardized test procedure are discussed. An investigation of 12 different test series from five different producers clearly indicates a large variation between different production series. Based on the investigation from the test series a reliability analysis is performed. The results indicate that the same partial safety factor as recommended for glued laminated timber (GLT) is appropriate in order to achieve an acceptable reliability. However, the analysis also indicates the potential for a smaller partial safety factor in the future, in case that the production of CLT is standardized and appropriate standardized test methods for the individual material properties exist.",
keywords = "Cross laminated timber, Partial safety factor, Structural reliability, Variability of the materiel properties",
author = "Gerhard Fink and Jochen Kohler and Reinhard Brandner",
year = "2018",
month = "9",
doi = "10.1016/j.engstruct.2018.02.081",
language = "English",
volume = "171",
pages = "934--943",
journal = "Engineering Structures",
issn = "0141-0296",
publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Application of European design principles to cross laminated timber

AU - Fink, Gerhard

AU - Kohler, Jochen

AU - Brandner, Reinhard

PY - 2018/9

Y1 - 2018/9

N2 - The design of cross laminated timber (CLT) structures is not included in the current version of European structural timber design standards of EN 1995 (Eurocode 5, EC 5). Due to the increasing importance of CLT, in different applications such as complete wall or floor elements as well as girders, it is one of the main goals of the currently ongoing revision of EC 5 to provide design principles for CLT structures. In the present paper some general aspects, relevant for the implementation of CLT in European standards in order to be consistent with the general philosophy of the Eurocodes are summarized and discussed. The differences between standard test specimens and structural components as well as the uncertainties related to the production procedure of CLT and the non-standardized test procedure are discussed. An investigation of 12 different test series from five different producers clearly indicates a large variation between different production series. Based on the investigation from the test series a reliability analysis is performed. The results indicate that the same partial safety factor as recommended for glued laminated timber (GLT) is appropriate in order to achieve an acceptable reliability. However, the analysis also indicates the potential for a smaller partial safety factor in the future, in case that the production of CLT is standardized and appropriate standardized test methods for the individual material properties exist.

AB - The design of cross laminated timber (CLT) structures is not included in the current version of European structural timber design standards of EN 1995 (Eurocode 5, EC 5). Due to the increasing importance of CLT, in different applications such as complete wall or floor elements as well as girders, it is one of the main goals of the currently ongoing revision of EC 5 to provide design principles for CLT structures. In the present paper some general aspects, relevant for the implementation of CLT in European standards in order to be consistent with the general philosophy of the Eurocodes are summarized and discussed. The differences between standard test specimens and structural components as well as the uncertainties related to the production procedure of CLT and the non-standardized test procedure are discussed. An investigation of 12 different test series from five different producers clearly indicates a large variation between different production series. Based on the investigation from the test series a reliability analysis is performed. The results indicate that the same partial safety factor as recommended for glued laminated timber (GLT) is appropriate in order to achieve an acceptable reliability. However, the analysis also indicates the potential for a smaller partial safety factor in the future, in case that the production of CLT is standardized and appropriate standardized test methods for the individual material properties exist.

KW - Cross laminated timber

KW - Partial safety factor

KW - Structural reliability

KW - Variability of the materiel properties

UR - http://www.scopus.com/inward/record.url?scp=85043992214&partnerID=8YFLogxK

U2 - 10.1016/j.engstruct.2018.02.081

DO - 10.1016/j.engstruct.2018.02.081

M3 - Article

VL - 171

SP - 934

EP - 943

JO - Engineering Structures

JF - Engineering Structures

SN - 0141-0296

ER -