Comparison of the use of angle brackets in timber joints with eurocode 5

Pošta, Jan; Hataj, Martin; Jára, Robert; Ptáček, Petr; Kuklík, Petr

doi:10.1016/j.conbuildmat.2019.02.053

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…The authors of the article used standard methods to assess the thermal properties of the tested fasteners: experimental tests and numerical simulations. Numerical simulations and experimental tests are widely used to study the properties of various building fasteners 1,2 in terms of strength 3,4 and materials used. Thermal imaging allows the identification of fastener thermal properties 5,6 and their impact on wall systems with multiple layers.…”

Section: List Of Symbolsmentioning

confidence: 99%

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Testing the thermal properties of modern ventilated facade fastening systems

Grabowski

Poniewski

Wernik

2023

Sci Rep

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The study reported in this paper investigated a set of building fasteners used in ventilated facades. For the building fasteners actually present in the industrial market the values of the effective thermal conductivity were measured experimentally. These values were used next in numerical simulations run with COMSOL Multiphysics software application. The validation of the simulation model was done in specific additional experimental test. The paper presents a method of determining the effective thermal conductivity coefficient for fasteners with a novel design. Temperature distributions and heat fluxes were determined for different variants of multilayer walls with the fasteners. The calculation of the effective thermal conductivity coefficient for a structural profile is based on the heat balance of the measuring stand. The performed tests show not only an expected reduction in the coefficient value for structures in which stainless steel is used. The results also demonstrate that the fasteners with holes cut out in their structures have significantly lower effective thermal conductivity coefficients than those with solid walls. This effect can be justified by the formation of labyrinth-like narrowings extending the conductive heat flow path in the fastener. As a final result of the experimental tests and the COMSOL simulations the application of the effective thermal conductivity as the new indicator of a thermal effectiveness of building fasteners is proposed in industrial practice. Consequently the design of the building fasteners with various shapes of holes is recommended for improving their insulation features.

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Section: List Of Symbolsmentioning

confidence: 99%

“…Numerical simulations and experimental tests are widely used to study the properties of various building fasteners 1 , 2 in terms of strength 3 , 4 and materials used. Thermal imaging allows the identification of fastener thermal properties 5 , 6 and their impact on wall systems with multiple layers.…”

Section: Introductionmentioning

confidence: 99%

Testing the thermal properties of modern ventilated facade fastening systems

Grabowski

Poniewski

Wernik

2023

Sci Rep

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“…The numerical modeling analysis indicated that replacing nails with screws and adding larger-sized screws did not noticeably improve the shear resistance of the connection. Pošta et al [8] performed shear experiments on three types of angle bracket connections and compared the experimental results with Eurocode 5 (EC 5) [9]. The results showed that the maximum loads obtained by EC 5 calculations were much higher than those obtained experimentally.…”

Section: Introductionmentioning

confidence: 99%

Regression algorithms-driven mechanical properties prediction of angle bracket connection on cross-laminated timber structures

Wu,

Chen,

Xiong

2024

J Wood Sci

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The construction of structures using cross-laminated timber (CLT) has grown in popularity as a result of its environmentally friendly and high-strength characteristics. The primary function of angle bracket connections is to resist the force of CLT structures under horizontal forces, which is essential to ensure the seismic resilience and ductility of CLT structures. A regression algorithms-driven method for predicting the mechanical performance of angle bracket connections is introduced in this study. As input parameters, the geometric dimensions of the angle bracket connector, the connection method of the connector with the wall and floor slabs, and the properties of the CLT panel are utilized to predict the yield load, the maximal load, the initial stiffness, and the ductility ratio of the angle bracket connection. Prediction models were developed using the collected data from 110 angle bracket experiments, and each prediction model's performance was discussed in depth. Lastly, the permutation importance and SHapley Additive exPlanations (SHAP) value analysis were used to interpret the prediction models. The results showed that the extreme gradient boosting (XGB) algorithm could accurately predict the maximum and yielding load of the angle bracket connection, with R2 reaching 0.968 and 0.939. Furthermore, in predicting the initial stiffness of the angle bracket, the XGB algorithm performed the best with an average ratio of predicted to actual values of 0.985. The results indicated that this study proposed an accurate and efficient method for angle bracket connection to predicting its mechanical properties and confirmed the trustworthiness and feasibility of the prediction models.

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Structural Behavior of Glulam Beams with Proper Reinforcement Bars—A Review

Suchithra¹,

Jayashree²

2021

Lecture Notes in Mechanical Engineering

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Comparison of the use of angle brackets in timber joints with eurocode 5

Cited by 4 publications

References 5 publications

Testing the thermal properties of modern ventilated facade fastening systems

Testing the thermal properties of modern ventilated facade fastening systems

Regression algorithms-driven mechanical properties prediction of angle bracket connection on cross-laminated timber structures

Structural Behavior of Glulam Beams with Proper Reinforcement Bars—A Review

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