Evaluation and approximation of timber connection properties for displacement-based analysis of CLT wall systems

Georg Flatscher

Research output: ThesisDoctoral ThesisResearch

Abstract

Aiming a comprehensive analysis of laterally loaded cross laminated timber (CLT) wall systems, the present thesis discusses two core topics. Initially, due to their major influence, the evaluation and approximation of timber connection properties are spotted. In particular, basing on an extensive discussion of already available methods, alternatives for determining the initial stiffness and ductility of timber joints are proposed. Furthermore, a capable displacement-based approach, able to approximate the entire course of even complex load-displacement relationships, is developed.
Subsequently, the focus is set on CLT wall systems. Besides a brief summary of currently applied calculation models, a new displacement-based method for predicting the load-displacement behaviour of wall diaphragms is proposed. In order to consider the nonlinear behaviour of connections, the afore-developed continuous function is used. The actual quality of the suggested wall model is verified by experimental results gathered from full scale wall tests, conducted at three independent research facilities. The positive outcome of this validation process consequently permits the use of the proposed model for a comprehensive parameter study.
Within the last part of the present thesis it is examined how several factors as, e.g., the wall length, vertical joints, different connections or the vertical load may affect the behaviour of CLT wall systems. Moreover, different approaches for determining the lateral load distribution on CLT wall diaphragms within one floor are discussed.
Translated title of the contributionBewertung und Approximation der Eigenschaften von Holzverbindungen zur verformungsbasierten Analyse von BSP Wandsystemen
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • Graz University of Technology (90000)
Supervisors/Advisors
  • Schickhofer, Gerhard, Supervisor
  • Seim, Werner, Advisor, External person
Publication statusPublished - May 2017

Keywords

    Fields of Expertise

    • Advanced Materials Science

    Treatment code (Nähere Zuordnung)

    • Experimental
    • Review
    • Application

    Cite this

    Evaluation and approximation of timber connection properties for displacement-based analysis of CLT wall systems. / Flatscher, Georg.

    2017.

    Research output: ThesisDoctoral ThesisResearch

    Flatscher, G 2017, 'Evaluation and approximation of timber connection properties for displacement-based analysis of CLT wall systems', Doctor of Philosophy, Graz University of Technology (90000).
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    title = "Evaluation and approximation of timber connection properties for displacement-based analysis of CLT wall systems",
    abstract = "Aiming a comprehensive analysis of laterally loaded cross laminated timber (CLT) wall systems, the present thesis discusses two core topics. Initially, due to their major influence, the evaluation and approximation of timber connection properties are spotted. In particular, basing on an extensive discussion of already available methods, alternatives for determining the initial stiffness and ductility of timber joints are proposed. Furthermore, a capable displacement-based approach, able to approximate the entire course of even complex load-displacement relationships, is developed.Subsequently, the focus is set on CLT wall systems. Besides a brief summary of currently applied calculation models, a new displacement-based method for predicting the load-displacement behaviour of wall diaphragms is proposed. In order to consider the nonlinear behaviour of connections, the afore-developed continuous function is used. The actual quality of the suggested wall model is verified by experimental results gathered from full scale wall tests, conducted at three independent research facilities. The positive outcome of this validation process consequently permits the use of the proposed model for a comprehensive parameter study.Within the last part of the present thesis it is examined how several factors as, e.g., the wall length, vertical joints, different connections or the vertical load may affect the behaviour of CLT wall systems. Moreover, different approaches for determining the lateral load distribution on CLT wall diaphragms within one floor are discussed.",
    keywords = "Cross Laminated Timber (CLT), wall system, timber connections, timber engineering, earthquake, Ductility",
    author = "Georg Flatscher",
    year = "2017",
    month = "5",
    language = "English",
    school = "Graz University of Technology (90000)",

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    TY - THES

    T1 - Evaluation and approximation of timber connection properties for displacement-based analysis of CLT wall systems

    AU - Flatscher, Georg

    PY - 2017/5

    Y1 - 2017/5

    N2 - Aiming a comprehensive analysis of laterally loaded cross laminated timber (CLT) wall systems, the present thesis discusses two core topics. Initially, due to their major influence, the evaluation and approximation of timber connection properties are spotted. In particular, basing on an extensive discussion of already available methods, alternatives for determining the initial stiffness and ductility of timber joints are proposed. Furthermore, a capable displacement-based approach, able to approximate the entire course of even complex load-displacement relationships, is developed.Subsequently, the focus is set on CLT wall systems. Besides a brief summary of currently applied calculation models, a new displacement-based method for predicting the load-displacement behaviour of wall diaphragms is proposed. In order to consider the nonlinear behaviour of connections, the afore-developed continuous function is used. The actual quality of the suggested wall model is verified by experimental results gathered from full scale wall tests, conducted at three independent research facilities. The positive outcome of this validation process consequently permits the use of the proposed model for a comprehensive parameter study.Within the last part of the present thesis it is examined how several factors as, e.g., the wall length, vertical joints, different connections or the vertical load may affect the behaviour of CLT wall systems. Moreover, different approaches for determining the lateral load distribution on CLT wall diaphragms within one floor are discussed.

    AB - Aiming a comprehensive analysis of laterally loaded cross laminated timber (CLT) wall systems, the present thesis discusses two core topics. Initially, due to their major influence, the evaluation and approximation of timber connection properties are spotted. In particular, basing on an extensive discussion of already available methods, alternatives for determining the initial stiffness and ductility of timber joints are proposed. Furthermore, a capable displacement-based approach, able to approximate the entire course of even complex load-displacement relationships, is developed.Subsequently, the focus is set on CLT wall systems. Besides a brief summary of currently applied calculation models, a new displacement-based method for predicting the load-displacement behaviour of wall diaphragms is proposed. In order to consider the nonlinear behaviour of connections, the afore-developed continuous function is used. The actual quality of the suggested wall model is verified by experimental results gathered from full scale wall tests, conducted at three independent research facilities. The positive outcome of this validation process consequently permits the use of the proposed model for a comprehensive parameter study.Within the last part of the present thesis it is examined how several factors as, e.g., the wall length, vertical joints, different connections or the vertical load may affect the behaviour of CLT wall systems. Moreover, different approaches for determining the lateral load distribution on CLT wall diaphragms within one floor are discussed.

    KW - Cross Laminated Timber (CLT)

    KW - wall system

    KW - timber connections

    KW - timber engineering

    KW - earthquake

    KW - Ductility

    M3 - Doctoral Thesis

    ER -