Method for Determining the Design Resistance of a Glued-In Twisted Elliptical Bar for Pulling Out in Elements of Wooden Structures

Лабудин, Б. В.; Tyurina, Olga; Mavrin, Dmitriy; Hasan, Wasim

doi:10.1007/978-3-030-85236-8_15

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…The scanning electron microscopy of the samples was performed using a Quanta 200 3D microscope (USA). With scanning electron microscopy, it is possible to study the micromorphology and fine structure of the sample surface using a focused electron beam scanning the sample surface (Cao et al, 2022;Labudin et al, 2022;Grünewald et al, 2012). Optical microscopy was performed using a Raztek MRX9-D digital optical microscope (Russia), which allows for the visual observation of the microstructure of opaque objects.…”

Section: Determining the Strength Of Wood Weakened By Fire Under Shea...mentioning

confidence: 99%

Mechanical and Microstructural Changes in Post-Fire Raw Wood

Lukina

Lisyatnikov²,

Martinov³

et al. 2022

AEJ

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Introduction: Today, the need for the neutralization of the environmental, economic, social, and other consequences of natural emergencies is becoming more and more urgent. One of such devastating disasters is forest fires, which are currently very widespread in the world. In most cases, after a fire, we are left with a forest that was partially exposed to fire. A burnt tree loses its immunity. As a result, an outbreak of various subcortical insect species, which infect healthy trees as well, occurs in these territories. Such a forest is subjected to sanitary cutting. Purpose of the study: We aimed to determine the residual mechanical properties of raw wood to be used as a structural material. Methods: In the course of the study, we used destructive and non-destructive testing methods in respect of the mechanical properties of the material. Results: It was established that changes in the microstructure of wood correlate with its strength properties. The maximum decrease in the strength properties of wood was observed at the top end of the tree and amounted to 22.7% as compared to the reference wood. The minimum decrease in the strength properties of post-fire wood was observed in the butt end of the tree and amounted up to 15.0%. In the middle part, a decrease in the strength properties of wood was up to 24.0%.

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Section: Determining the Strength Of Wood Weakened By Fire Under Shea...mentioning

confidence: 99%

Mechanical and Microstructural Changes in Post-Fire Raw Wood

Lukina

Lisyatnikov²,

Martinov³

et al. 2022

AEJ

View full text Add to dashboard Cite

show abstract

Section: Determining the Strength Of Wood Weakened By Fire Under Shea...mentioning

confidence: 99%

Untitled

2022

AEJ

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Introduction: Heritage conservation attracts wide attention worldwide. Jordan has many heritage buildings that were preserved, rehabilitated, and adapted to new functions. However, these conservation efforts could not solve the energy consumption problem or maintain the economic and financial balance, thus reducing building efficiency, slowing down the conservation activity, and forcing us to consider new solutions, especially since Jordan has limited energy sources. Integrating smart technologies in historical buildings is widely effective in achieving the sustainability of their historical, symbolic architectural values. Purpose of the study: We aimed to explore the potential integration of smart technologies in cultural and heritage buildings. Methods: We suggested an alternative solution -adopting the smart building concept in the Abu Jaber Museum in Al-Salt (which recently got on the UNESCO World Heritage List since it has more than 1000 heritage buildings), using an automated lighting control system. Approach: We deployed the qualitative method and case study approach to investigate the potential of adopting the smart building concept in the historical building in Al-Salt, Jordan. The study sheds light on the possibilities of utilizing smart technologies in historical buildings in Al-Salt.The findings indicate that smart technologies can offer great opportunity in preserving the architectural heritage and raising the efficiency of heritage buildings. Novelty: The study provides a framework based mainly on automated lighting systems in historical buildings. For the first time, the focus was on historical buildings in Jordan and their performance.

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Modelling of stresses and deformations in glued wooden beam with composite reinforcement in COMSOL Multiphysics software package

Tsybakin,

Titunin,

Tsvetkov

2024

Smart Composite in Construction

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The paper presents the results of the study on a model of a glued wooden beam with composite reinforcement. The authors use a software package using the finite element method COMSOL Multiphysics to model and study the stress-strain state of spatial multilayer wooden structures with reinforcement. The main focus is on analyzing the stress and strain characteristics of the beam under various loads. The paper considers the advantages of composite reinforcement efficiency and its influence on increasing the strength and durability of wooden structures. The authors pay special attention to the integration of experimentally obtained characteristics of wood and composite materials into the numerical model. It increases the accuracy of the modelling results. When constructing the 3D model, we have used a simplified wooden model as a transversal-isotropic body. It allows taking into account uncertainties on orientation to the tangential and radial directions in the beam. The results obtained confirm the increased load carrying capacity and reduced deformations in the beam due to the use of composite reinforcement compared to traditional wooden structures. The use of a 3D model of a glued beam with composite reinforcement also provides reduced research costs compared to in-situ experiments.

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Method for Determining the Design Resistance of a Glued-In Twisted Elliptical Bar for Pulling Out in Elements of Wooden Structures

Cited by 3 publications

References 20 publications

Mechanical and Microstructural Changes in Post-Fire Raw Wood

Mechanical and Microstructural Changes in Post-Fire Raw Wood

Untitled

Modelling of stresses and deformations in glued wooden beam with composite reinforcement in COMSOL Multiphysics software package

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