Cross laminated timber (CLT): Design approaches for dowel-type fasteners and connections

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

Within the last 20 years, cross laminated timber (CLT) has become one of the most important building products in contemporary timber engineering. By the end of this decade, its annual worldwide production volume is expected to exceed 1,000,000 m3. The industry, engineers, architects and constructors have a strong interest in implementing CLT in European product, design and execution standards. The design of CLT is part of the currently ongoing revision of Eurocode 5. In this context and in addition to the verification of CLT panels in respect of ultimate and serviceability limit states, guidelines on the design of connections in CLT with dowel-type fasteners are of the utmost importance. In this article, we review approaches for calculating characteristic values as provided in literature for single dowel-type fasteners and connections in CLT. We also compare these approaches, with focus on withdrawal and embedment strength of dowels, nails and self-tapping screws, with the current regulations on dowel-type fasteners for solid timber and glulam as formulated in Eurocode 5. These comparisons are made in order to identify the need and potential for revision of current EC 5 equations and state-of-the-art regulations. We summarise regulations on connection design, i.e. minimum spacing, edge and end distances, other additional geometrical conditions, regulations on the effective number of fasteners in a group and minimum penetration depths. Finally, we draw conclusions in respect of the single fastener properties withdrawal and embedment strength and suggest some execution guidelines, which ensure the integrity of CLT structures. Overall, we aim to present a compilation of the current state-of-the-art knowledge on dowel-type fasteners in CLT as a basis for implementing design guidelines for CLT in the new connection chapter of Eurocode 5.

Spracheenglisch
Seiten849-861
FachzeitschriftEngineering Structures
Jahrgang171
DOIs
StatusVeröffentlicht - 2018

Fingerprint

Fasteners
Timber
Nails
Product design
Engineers

Schlagwörter

    ASJC Scopus subject areas

    • !!Civil and Structural Engineering

    Dies zitieren

    Cross laminated timber (CLT): Design approaches for dowel-type fasteners and connections. / Ringhofer, Andreas; Brandner, Reinhard; Blaß, Hans Joachim.

    in: Engineering Structures, Jahrgang 171, 2018, S. 849-861.

    Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

    @article{f3dd886152bc447297154e4b02ae88c6,
    title = "Cross laminated timber (CLT): Design approaches for dowel-type fasteners and connections",
    abstract = "Within the last 20 years, cross laminated timber (CLT) has become one of the most important building products in contemporary timber engineering. By the end of this decade, its annual worldwide production volume is expected to exceed 1,000,000 m3. The industry, engineers, architects and constructors have a strong interest in implementing CLT in European product, design and execution standards. The design of CLT is part of the currently ongoing revision of Eurocode 5. In this context and in addition to the verification of CLT panels in respect of ultimate and serviceability limit states, guidelines on the design of connections in CLT with dowel-type fasteners are of the utmost importance. In this article, we review approaches for calculating characteristic values as provided in literature for single dowel-type fasteners and connections in CLT. We also compare these approaches, with focus on withdrawal and embedment strength of dowels, nails and self-tapping screws, with the current regulations on dowel-type fasteners for solid timber and glulam as formulated in Eurocode 5. These comparisons are made in order to identify the need and potential for revision of current EC 5 equations and state-of-the-art regulations. We summarise regulations on connection design, i.e. minimum spacing, edge and end distances, other additional geometrical conditions, regulations on the effective number of fasteners in a group and minimum penetration depths. Finally, we draw conclusions in respect of the single fastener properties withdrawal and embedment strength and suggest some execution guidelines, which ensure the integrity of CLT structures. Overall, we aim to present a compilation of the current state-of-the-art knowledge on dowel-type fasteners in CLT as a basis for implementing design guidelines for CLT in the new connection chapter of Eurocode 5.",
    keywords = "CLT, Connections, Cross laminated timber, Design, Dowel-type fasteners, Dowels, Embedment, Nails, Narrow face, Self-tapping screws, Side face, Single fasteners, Withdrawal",
    author = "Andreas Ringhofer and Reinhard Brandner and Bla{\ss}, {Hans Joachim}",
    year = "2018",
    doi = "10.1016/j.engstruct.2018.05.032",
    language = "English",
    volume = "171",
    pages = "849--861",
    journal = "Engineering Structures",
    issn = "0141-0296",
    publisher = "Elsevier B.V.",

    }

    TY - JOUR

    T1 - Cross laminated timber (CLT): Design approaches for dowel-type fasteners and connections

    AU - Ringhofer, Andreas

    AU - Brandner, Reinhard

    AU - Blaß, Hans Joachim

    PY - 2018

    Y1 - 2018

    N2 - Within the last 20 years, cross laminated timber (CLT) has become one of the most important building products in contemporary timber engineering. By the end of this decade, its annual worldwide production volume is expected to exceed 1,000,000 m3. The industry, engineers, architects and constructors have a strong interest in implementing CLT in European product, design and execution standards. The design of CLT is part of the currently ongoing revision of Eurocode 5. In this context and in addition to the verification of CLT panels in respect of ultimate and serviceability limit states, guidelines on the design of connections in CLT with dowel-type fasteners are of the utmost importance. In this article, we review approaches for calculating characteristic values as provided in literature for single dowel-type fasteners and connections in CLT. We also compare these approaches, with focus on withdrawal and embedment strength of dowels, nails and self-tapping screws, with the current regulations on dowel-type fasteners for solid timber and glulam as formulated in Eurocode 5. These comparisons are made in order to identify the need and potential for revision of current EC 5 equations and state-of-the-art regulations. We summarise regulations on connection design, i.e. minimum spacing, edge and end distances, other additional geometrical conditions, regulations on the effective number of fasteners in a group and minimum penetration depths. Finally, we draw conclusions in respect of the single fastener properties withdrawal and embedment strength and suggest some execution guidelines, which ensure the integrity of CLT structures. Overall, we aim to present a compilation of the current state-of-the-art knowledge on dowel-type fasteners in CLT as a basis for implementing design guidelines for CLT in the new connection chapter of Eurocode 5.

    AB - Within the last 20 years, cross laminated timber (CLT) has become one of the most important building products in contemporary timber engineering. By the end of this decade, its annual worldwide production volume is expected to exceed 1,000,000 m3. The industry, engineers, architects and constructors have a strong interest in implementing CLT in European product, design and execution standards. The design of CLT is part of the currently ongoing revision of Eurocode 5. In this context and in addition to the verification of CLT panels in respect of ultimate and serviceability limit states, guidelines on the design of connections in CLT with dowel-type fasteners are of the utmost importance. In this article, we review approaches for calculating characteristic values as provided in literature for single dowel-type fasteners and connections in CLT. We also compare these approaches, with focus on withdrawal and embedment strength of dowels, nails and self-tapping screws, with the current regulations on dowel-type fasteners for solid timber and glulam as formulated in Eurocode 5. These comparisons are made in order to identify the need and potential for revision of current EC 5 equations and state-of-the-art regulations. We summarise regulations on connection design, i.e. minimum spacing, edge and end distances, other additional geometrical conditions, regulations on the effective number of fasteners in a group and minimum penetration depths. Finally, we draw conclusions in respect of the single fastener properties withdrawal and embedment strength and suggest some execution guidelines, which ensure the integrity of CLT structures. Overall, we aim to present a compilation of the current state-of-the-art knowledge on dowel-type fasteners in CLT as a basis for implementing design guidelines for CLT in the new connection chapter of Eurocode 5.

    KW - CLT

    KW - Connections

    KW - Cross laminated timber

    KW - Design

    KW - Dowel-type fasteners

    KW - Dowels

    KW - Embedment

    KW - Nails

    KW - Narrow face

    KW - Self-tapping screws

    KW - Side face

    KW - Single fasteners

    KW - Withdrawal

    UR - http://www.scopus.com/inward/record.url?scp=85047200837&partnerID=8YFLogxK

    U2 - 10.1016/j.engstruct.2018.05.032

    DO - 10.1016/j.engstruct.2018.05.032

    M3 - Article

    VL - 171

    SP - 849

    EP - 861

    JO - Engineering Structures

    T2 - Engineering Structures

    JF - Engineering Structures

    SN - 0141-0296

    ER -