A unified design proposal for shear stress prediction in crossing areas for cross laminated timber at in-plane shear and beam loading conditions

Danielsson, Henrik; Jeleč, Mario

doi:10.1016/j.conbuildmat.2022.129167

Cited by 6 publications

(2 citation statements)

References 8 publications

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“…For practical design situations involving in-plane shear of CLT, such as in-plane beam loading, there is typically a large number of crossing areas within the member with combined torsion and uniaxial shear loading. Proposed design approaches for CLT beams, as presented in [1][2]11], are based on models considering linear elastic behaviour and do not account for gradual damage and strain-softening over the crossing areas during increased loading. To gain better understanding of the mechanical behaviour, further numerical analyses considering full-sized CLT beams modelled with softening contact are suggested.…”

Section: Discussionmentioning

confidence: 99%

Shear Failure Mechanism Iii in Cross Laminated Timber - Numerical Investigations of Fracture Behaviour

Danielsson

Serrano

2023

World Conference on Timber Engineering (WCTE 2023)

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The paper deals with numerical investigations of load-bearing capacity and fracture behaviour of Cross Laminated Timber at in-plane shear loading. Focus is on shear failure mechanism III, i.e. failure in the crossing areas between flatwise bonded laminations, and on evaluating test methods for that failure mode. In current design provisions, this failure mode is characterised by the rolling shear strength, fv,R, and the torsional shear strength, fv,tor, and therefore testing including both transverse (rolling) shear and torsional shear is needed. Two such test set-ups are investigated, one aiming at evaluating torsional shear strength and one aiming at evaluating rolling shear strength. Full 3D finite element analyses applying a cohesive zone model approach were used to study the strength and fracture behaviour. Failure criteria for structural design, material strength parameters, and the suitability of the two test configurations to determine strength parameters are discussed in relation to findings from the numerical investigations. One main conclusion from the investigation is that expected test results using the torsional test set-up are less size dependent as compared to test results using the transverse set-up. The numerical analyses suggest a very small influence from tensile loading perpendicular to the crossing area, for both test set-ups.

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Section: Discussionmentioning

confidence: 99%

Shear Failure Mechanism Iii in Cross Laminated Timber - Numerical Investigations of Fracture Behaviour

Danielsson

Serrano

2023

World Conference on Timber Engineering (WCTE 2023)

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“…Modifications of the original model by Flaig & Blass have been suggested in [19], aimed at improving predictions of the stress state at loading (compared to the results of finite element simulations). A unified design approach, covering both the case of pure in-plane shear loading and in-plane beam loading, has been developed and is presented in [20]. This approach is based on the analytical model for pure shear loading and the modified model for the beam loading case, with some simplifications and approximations to arrive at rather simple and compact design equations.…”

Section: Clt In-plane Shearmentioning

confidence: 99%

Innocrosslam - Adding Knowledge Towards Increased Use of Cross Laminated Timber (Clt)

Azinović

Serrano

Danielsson

et al. 2023

World Conference on Timber Engineering (WCTE 2023)

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The research project Innovative Solutions for Cross Laminated Timber Structures (InnoCrossLam) was recently finished. The project aimed at increasing the competitiveness of CLT as a versatile engineered product, by increasing its predictability in demanding design situations not covered by the guidelines of today, or standards and codes foreseeable in the near future (e.g., second generation of European design standards). This paper summarises the main project findings in the context of innovative CLT structures, such as: i. contemporary design approaches ii. the use of (non)linear FE modelling iii. experimental investigation of complex details for CLT structures, iv. investigation of multifunctional CLT. In this paper, the motivation behind the research topics within the project InnoCrossLam is explained and backed-up by exemplary results and discussion on future work.

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Bending and shear performance of a cross-laminated composite consisting of flattened bamboo board and Chinese fir lumber

Zhang

Yang

Fei

et al. 2023

Construction and Building Materials

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A unified design proposal for shear stress prediction in crossing areas for cross laminated timber at in-plane shear and beam loading conditions

Cited by 6 publications

References 8 publications

Shear Failure Mechanism Iii in Cross Laminated Timber - Numerical Investigations of Fracture Behaviour

Shear Failure Mechanism Iii in Cross Laminated Timber - Numerical Investigations of Fracture Behaviour

Innocrosslam - Adding Knowledge Towards Increased Use of Cross Laminated Timber (Clt)

Bending and shear performance of a cross-laminated composite consisting of flattened bamboo board and Chinese fir lumber

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