Structural Timber Connections with Dowel-Type Fasteners and Nut-Washer Fixings: Mechanical Characterization and Contribution to the Rope Effect

Fuente: Materials

Bibliographic Details
Authors: Domínguez Lorenzo, Manuel, González Fueyo, José Luis, Villarino Otero, Alberto, Antón Iglesias, María Natividad
Format: article
Status:Published version
Publication Date:2022
Country:España
Institution:Universidad de Salamanca (USAL)
Repository:GREDOS. Repositorio Institucional de la Universidad de Salamanca
OAI Identifier:oai:gredos.usal.es:10366/154745
Online Access:http://hdl.handle.net/10366/154745
Access Level:Open access
Keyword:structural timber connections
dowel-type fasteners
nut-washer fixings
rope effect
timber mechanical behavior
33 Ciencias tecnológicas
2205.07 Medidas de Propiedades Mecánicas
3312.08 Propiedades de Los Materiales
3305.39 Construcciones de Madera
3312.13 Tecnología de la Madera
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oai_identifier_str oai:gredos.usal.es:10366/154745
network_acronym_str ES
network_name_str España
repository_id_str
spelling Structural Timber Connections with Dowel-Type Fasteners and Nut-Washer Fixings: Mechanical Characterization and Contribution to the Rope EffectDomínguez Lorenzo, ManuelGonzález Fueyo, José LuisVillarino Otero, AlbertoAntón Iglesias, María Natividadstructural timber connectionsdowel-type fastenersnut-washer fixingsrope effecttimber mechanical behavior33 Ciencias tecnológicas2205.07 Medidas de Propiedades Mecánicas3312.08 Propiedades de Los Materiales3305.39 Construcciones de Madera3312.13 Tecnología de la MaderaFuente: Materials[EN] Dowel-type fasteners are one of the most used type of connections in timber joints. Its design follows the equations included in the Eurocode 5. The problem with these equations is that they do not adequately contemplate the resistive capacity increase of these joints, when using configurations which provoke the so-called rope effect. This effect appears when using threaded surface dowels instead of flat surface dowels, expansion kits or nut-washer fixings at the end of the dowel. The standards consider this increase through a constant value, which is a poor approximation, because it is clearly variable, depending on the joint displacement and because is much bigger, especially when using nut-washer fixings. It is also very important because of the rope effect trigger interesting mechanisms that avoids fragile failures without warning of the joints. For these reasons, it is essential to know how these configurations work, how they help the joint to resist the external loads and how much is the increase resistance capacity in relationship with the joint displacement. The methods used to address these issues consisted of a campaign of experimental tests using actual size specimens with flat surface dowels, threaded surface dowels and dowels with washer-nut fixings at their ends. The resistance capacity results obtained in all the cases has been compared with the values that will come using the equations in the standards. After the tests the specimens were cut to analyze the timber crushings, their widths, the positions and level of plasticizations suffer in the steel dowels and in the washer-nut fixings and the angle formed in the dowel plastic hinges. With all this information the failure mode suffered by the joints has been identified and compared with the ones that the standards predict. The results for the size materials and types of joints studied shows that the crush width average values go from 20 mm with flat surface dowels, to 24 mm in threaded to 32 mm in threaded with washer-nut fixings. The rope effect force/displacement goes from 100 N/m in threaded surface dowels to 500 N/m in threaded with washer-nut fixings. Finally, the load capacities are on average 290% higher those indicated in the standard. The main conclusion is that the rope effect force should be considered in the standards in more detail as a function of multiple variables, especially the displacement of the joint.Multidisciplinary Digital Publishing Institute MDPI202420242022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10366/154745reponame:GREDOS. Repositorio Institucional de la Universidad de Salamancainstname:Universidad de Salamanca (USAL)InglésSpanish government, VI National Plan for Scientific Research, Development and Technological Innovation of the Ministry of Economy and Competitiveness, within the framework of research project BIA2012-36766Attribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:gredos.usal.es:10366/1547452026-06-07T06:28:51Z
dc.title.none.fl_str_mv Structural Timber Connections with Dowel-Type Fasteners and Nut-Washer Fixings: Mechanical Characterization and Contribution to the Rope Effect
title Structural Timber Connections with Dowel-Type Fasteners and Nut-Washer Fixings: Mechanical Characterization and Contribution to the Rope Effect
spellingShingle Structural Timber Connections with Dowel-Type Fasteners and Nut-Washer Fixings: Mechanical Characterization and Contribution to the Rope Effect
Domínguez Lorenzo, Manuel
structural timber connections
dowel-type fasteners
nut-washer fixings
rope effect
timber mechanical behavior
33 Ciencias tecnológicas
2205.07 Medidas de Propiedades Mecánicas
3312.08 Propiedades de Los Materiales
3305.39 Construcciones de Madera
3312.13 Tecnología de la Madera
title_short Structural Timber Connections with Dowel-Type Fasteners and Nut-Washer Fixings: Mechanical Characterization and Contribution to the Rope Effect
title_full Structural Timber Connections with Dowel-Type Fasteners and Nut-Washer Fixings: Mechanical Characterization and Contribution to the Rope Effect
title_fullStr Structural Timber Connections with Dowel-Type Fasteners and Nut-Washer Fixings: Mechanical Characterization and Contribution to the Rope Effect
title_full_unstemmed Structural Timber Connections with Dowel-Type Fasteners and Nut-Washer Fixings: Mechanical Characterization and Contribution to the Rope Effect
title_sort Structural Timber Connections with Dowel-Type Fasteners and Nut-Washer Fixings: Mechanical Characterization and Contribution to the Rope Effect
dc.creator.none.fl_str_mv Domínguez Lorenzo, Manuel
González Fueyo, José Luis
Villarino Otero, Alberto
Antón Iglesias, María Natividad
author Domínguez Lorenzo, Manuel
author_facet Domínguez Lorenzo, Manuel
González Fueyo, José Luis
Villarino Otero, Alberto
Antón Iglesias, María Natividad
author_role author
author2 González Fueyo, José Luis
Villarino Otero, Alberto
Antón Iglesias, María Natividad
author2_role author
author
author
dc.subject.none.fl_str_mv structural timber connections
dowel-type fasteners
nut-washer fixings
rope effect
timber mechanical behavior
33 Ciencias tecnológicas
2205.07 Medidas de Propiedades Mecánicas
3312.08 Propiedades de Los Materiales
3305.39 Construcciones de Madera
3312.13 Tecnología de la Madera
topic structural timber connections
dowel-type fasteners
nut-washer fixings
rope effect
timber mechanical behavior
33 Ciencias tecnológicas
2205.07 Medidas de Propiedades Mecánicas
3312.08 Propiedades de Los Materiales
3305.39 Construcciones de Madera
3312.13 Tecnología de la Madera
description Fuente: Materials
publishDate 2022
dc.date.none.fl_str_mv 2022
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10366/154745
url http://hdl.handle.net/10366/154745
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Spanish government, VI National Plan for Scientific Research, Development and Technological Innovation of the Ministry of Economy and Competitiveness, within the framework of research project BIA2012-36766
dc.rights.none.fl_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivatives 4.0 Internacional
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute MDPI
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute MDPI
dc.source.none.fl_str_mv reponame:GREDOS. Repositorio Institucional de la Universidad de Salamanca
instname:Universidad de Salamanca (USAL)
instname_str Universidad de Salamanca (USAL)
reponame_str GREDOS. Repositorio Institucional de la Universidad de Salamanca
collection GREDOS. Repositorio Institucional de la Universidad de Salamanca
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869411994940997632
score 15.300719

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