Determinación de la capacidad resistente de la madera estructural de gran escuadría y su aplicación en estructuras existentes de madera de conífera

Herrero, Miguel Esteban

doi:10.20868/upm.thesis.1404

Cited by 4 publications

(3 citation statements)

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“…There are a multitude of studies, particularly with regard to structural wood, which address the relationship between velocity of propagation of ultrasound or stress waves in the longitudinal direction and the mechanical properties [32,[35][36][37][38][39][40][41]. These studies have reported good coefficients of determination, reaching values as high as 0.98, in samples free of defects [42].…”

Section: Relationship Between Dynamic and Static Modulus Of Elasticit...mentioning

confidence: 99%

Nondestructive Techniques for Determination of Wood Mechanical Properties of Urban Trees in Madrid

Virgen-Cobos

Olvera-Licona

Hermoso

et al. 2022

Forests

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The aim of this paper is to analyze the mechanical properties of Robinia pseudoacacia L. (black locust), Platanus × hybrida Brot. (London plane), Ulmus pumila L. (Siberian elm), and Populus alba L. (white poplar), estimated using ultrasound wave equipment (USLab y Sylvatest Duo) and impact wave equipment (Microsecond Timer) on standing trees, felled logs and on specimens obtained from different parts of the trees. Bending strength, axial compression strength and tension parallel to grain were determined for each specimen, in order to subsequently correlate the strength and stiffness with the acoustic properties determined in the standing tree. For the relationship between the static modulus of elasticity of the specimens and the dynamic modulus of elasticity determined in standing trees using the USLab, coefficients of determination were found to be between 0.30–0.92, between 0.52 and 0.80 using the Sylvatest Duo and between 0.60 and 0.94 with the Microsecond Timer. It would be necessary to determine whether the removal of bark for the correct coupling of the ultrasonic sensors would provide an entry route for pests or diseases that could affect the health of the tree.

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Section: Relationship Between Dynamic and Static Modulus Of Elasticit...mentioning

confidence: 99%

Nondestructive Techniques for Determination of Wood Mechanical Properties of Urban Trees in Madrid

Virgen-Cobos

Olvera-Licona

Hermoso

et al. 2022

Forests

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“…In species which grow in less favourable ecological conditions, growth rings are usually narrower and the early/latewood transition is more abrupt. The gradual transition in the wood of A. grandis, A. venusta and A. concolor was used by Wiesehuegel (1932) as a diagnostic feature, but this characteristic of some species of Abies should not be applied for this purpose as it is strongly influenced by ecological conditions (Esteban et al 2003).…”

Section: General Featuresmentioning

confidence: 99%

Wood Anatomy Of The Genus Abies A Review

Esteban¹,

Palacios²,

Fernández³

et al. 2009

IAWA J

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The literature on the wood anatomy of the genus Abies is reviewed and discussed, and complemented with a detailed study of 33 species, 1 subspecies and 4 varieties. In general, the species studied do not show diagnostic interspecific differences, although it is possible to establish differences between groups of species using certain quantitative and qualitative features.The marginal axial parenchyma consisting of single cells and the ray parenchyma cells with distinctly pitted horizontal walls, nodular end walls and presence of indentures are constant for the genus, although these features also occur in the other genera of the Abietoideae. The absence of ray tracheids in Abies can be used to distinguish it from Cedrus and Tsuga, and the irregularly shaped parenchymatous marginal ray cells are only shared with Cedrus. The absence of resin canals enables Abies to be distinguished from very closely related genera such as Keteleeria and Nothotsuga. The crystals in the ray cells, taxodioid cross-field pitting and the warty layer in the tracheids can be regarded as diagnostic generic features.

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“…Ambos, desde lo más antiguo de la prehistoria, llegan hasta nuestros días y se revelan en la actualidad como los materiales más empleados en las estructuras más evolucionadas. [4] Eucalipto El eucalyptus globulus es un árbol magnífico, espectacular y de elevada talla, llega a alcanzar los 70 metros de altura y 2 metros de diámetro, aunque normalmente supera los 50 metros de altura y los 1.50 metros de diámetro medido a 1.30 metros de altura sobre el suelo, la característica más llamativa es su "heterofilia"; hojas jóvenes opuestas, dentadas y acorazonadas y las adultas alternas, pecioladas, falciformes y acuminadas. [2] Pino Es un árbol de talla media a elevada, de aproximadamente 45 metros de altura, puede alcanzar un diámetro de tronco de más de 50 centímetros en 20 años.…”

Section: Introductionunclassified

Resistance To Bending Of Solid Beams And Laminated Beams For Two Types Of Woods, In The City Of Cajamarca

Guarniz¹,

Aguilar²

2021

Proceedings of the 19th LACCEI International Multi-Conference for Engineering, Education, and Technology: “Prospective and Tren

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This research evaluated the flexural strength of solid beams and laminated beams for two types of wood, in the city of Cajamarca, due to the need to know the capacity of these two types of wood: Eucalyptus and Pine; since both types of wood are easily available in the city of Cajamarca, as well as being inexpensive in the local market. The tests were carried out in the laboratories of the Faculty of Engineering of the Universidad Privada del Norte, Cajamarca headquarters. Protocols were used for the execution of tests, whose results were processed in Excel spreadsheets, then they were analyzed and interpreted for each type of specimen: solid beams and laminated beams (wooden sheets joined together, with synthetic glue based on polyacetate vinyl). To obtain the flexural strength of the wooden beams, a maximum load was applied on the universal testing machine, considering the dimensions and the distance of the support. In the execution of the investigation, we first proceeded with the recognition of the material, its cuts and the production of the solid and laminated wooden beams, considering the dimensions of the wooden beams, based on the tests, to determine up to how much load can stand. Subsequently, the information obtained was processed and it was determined that the performance of the Eucalyptus solid beams had better performance than theEucalyptus laminated beams, in the case of the Pine solid beams and the Pine laminated beams, these had similar behavior.

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Determinación de la capacidad resistente de la madera estructural de gran escuadría y su aplicación en estructuras existentes de madera de conífera

Cited by 4 publications

References 0 publications

Nondestructive Techniques for Determination of Wood Mechanical Properties of Urban Trees in Madrid

Nondestructive Techniques for Determination of Wood Mechanical Properties of Urban Trees in Madrid

Wood Anatomy Of The Genus Abies A Review

Resistance To Bending Of Solid Beams And Laminated Beams For Two Types Of Woods, In The City Of Cajamarca

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