Reinforcement of Timber Structures: Standardization Towards a New Section for EC 5

Dietsch, Philipp

doi:10.1007/978-3-030-67794-7_6

Cited by 3 publications

(8 citation statements)

References 6 publications

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“…Reinforced case Unreinforced case Figure 5: Comparison between the evolution of the compliance for a reinforced and an unreinforced beam of the same geometry Consequently, the recommendations given in literature and standard are more justified by this observation, since they limit the strength of reinforced beams with a similar ratio [11]. Moreover, figure 6 illustrates that crack propagates between the corner of the notch and the reinforcement axis with the same ratio of mode I and II than the unreinforced beam (curves are superimposed).…”

Section: Reinforcements Axismentioning

confidence: 92%

“…SFS WR-T-9X350 reinforcements are used for this. The location of the reinforcement follows recommendations given by Dietsch [11], with an axis at a distance of 25 mm behind the notch corner. The ultimate shear strength of the beams tested are given by tables 1,2 and 3.…”

Section: Validation By Experimentsmentioning

confidence: 99%

“…So, in conclusion, the DIN 1052 can lead to an overestimation of the load-bearing capacity of reinforced notched beams, if the crack extension in wood is not considered. On another hand, the proposed model provides a useful tool, which could be added to the current Eurocode 5 proposal [11] in order to give a better prediction of the potential failure…”

Section: Conservative Predictionsmentioning

confidence: 99%

“…Concerning the reinforced beams, no design rules are present in the Eurocode 5. During the World Conference on Timber Engineering in 2016 (WCTE), some formulations were proposed [11].They are extracted from the DIN 1052 [5], and they are relative to the use of screws as reinforcement. This expression is based on the works performed by Henrici [20], which used the beam theory and the plate theory to estimate the tensile force ( ,90, ) supported by the reinforcement [2] and located behind the corner of the notch.…”

Section: Introductionmentioning

confidence: 99%

“…The DIN fixed this coefficient equal to 1.3, which gives a conservative prediction of the load-bearing capacity of reinforced notched beams for < 0.8 and < 0.2 [34]. Henrici extended this application field to < 0.3, which is recommended by Dietsch [11] in the proposal for the Eurocode 5. However, the approach is limited to small notch size.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Prediction of the ultimate load-carrying capacity of wooden notched beams with and without reinforcements using a splitting model

Sorin

Coureau

Chaplain

2021

Construction and Building Materials

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Section: Reinforcements Axismentioning

confidence: 92%

Section: Validation By Experimentsmentioning

confidence: 99%

Section: Conservative Predictionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Prediction of the ultimate load-carrying capacity of wooden notched beams with and without reinforcements using a splitting model

Sorin

Coureau

Chaplain

2021

Construction and Building Materials

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Reinforced Notched Cross-Laminated Timber Plates: Load-Bearing Capacity and Methodology for Predicting the Force in Reinforcement

Malagić

Serrano

Augustin

et al. 2023

World Conference on Timber Engineering (WCTE 2023)

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This paper deals with the estimation of the design force in self-tapping screws used as a reinforcement of notched cross laminated timber plates (CLT). With the reinforcement, apart from an increased load-carrying capacity, a more ductile behaviour of this detail can be achieved. An analytical model based on the Timoshenko Beam Theory was developed, enabling the estimation of the axial force in the reinforcement. A parametric numerical analysis was conducted to verify the model and to provide possible ways for the calibration. The results show a good matching of the model with the numerical results. The load-bearing capacity is analysed using a simple fracture mechanics model taking into consideration the effect of the reinforcement to correctly depict the increase in performance. Theoretical and numerical results are compared with experimental findings and show acceptable correlations encouraging a further development and a subsequent implementation in EN 1995-1-1.

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Bearing Supports Reinforced With Screws: Experimental Investigation and Discussion of the Design Models in Eurocode 5

Tomasi,

Aloisio,

Ussher

et al. 2023

World Conference on Timber Engineering (WCTE 2023)

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This experimental investigation has been undertaken with the aim to discuss the current model for compression perpendicular to grain (CPG) proposed in the new Eurocode 5 draft. The current draft present two approaches proposed to assess load-carrying capacity of timber members subjected to CPG with reinforcement (Proposed reinforcement approach) and without reinforcement (New Model). The predictions of existing capacity models are compared to the experimental results of 39 timber specimens, distinguished by different load, screw and geometric configurations. Current capacity models for CPG with reinforcement assume two failure mechanisms, mainly characterized by their location, i.e. the contact area of the applied load (first mode) or the screw tips (second mode). However, the experimental tests reveal that the second mode never occurs despite the model predicting the occurrence of the second mode in more than half of the tested specimens. Additionally, the experimental tests show the fallacy of existing models in accurately estimating the capacity associated with the second failure mode. Parallelly, the model appears to be relatively conservative for the first failure mode.

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Reinforcement of Timber Structures: Standardization Towards a New Section for EC 5

Cited by 3 publications

References 6 publications

Prediction of the ultimate load-carrying capacity of wooden notched beams with and without reinforcements using a splitting model

Prediction of the ultimate load-carrying capacity of wooden notched beams with and without reinforcements using a splitting model

Reinforced Notched Cross-Laminated Timber Plates: Load-Bearing Capacity and Methodology for Predicting the Force in Reinforcement

Bearing Supports Reinforced With Screws: Experimental Investigation and Discussion of the Design Models in Eurocode 5

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