Influence of the rope effect on the slip curve of laterally loaded, nailed and screwed timber-to-timber connections

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Gečys, TomasVilnius Gediminas Technical University, Lithuania (author)

Influence of the rope effect on the slip curve of laterally loaded, nailed and screwed timber-to-timber connections

Article/chapterEnglish2019

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Elsevier,2019
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LIBRIS-ID:oai:DiVA.org:lnu-89192
https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-89192URI
https://doi.org/10.1016/j.conbuildmat.2019.116702DOI

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Language:English
Summary in:English

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

Notes

Timber-to-timber connections with different types of screws and nails were experimentally investigated with the aim to quantify the contribution of their axial resistance to their slip and their lateral load bearing capacity, which is the so-called rope effect in dowel-type timber connections. Five different types of screws, including partly threaded and double-threaded screws, as well as three types of nails, including smooth round nails, twisted square-sectioned and grooved nails, were used in the experimental investigations in order to cover a broad range of axial resistance of fasteners. Their behavior was tested in single shear and double shear timber-to-timber connections. In addition to connection testing, system and material properties were experimentally determined. This gave input to design equations and allowed for a comparison of the mechanical model in the European design standard for timber structures, Eurocode 5, with experiments. Experiments indicate that the initial slip modulus in the quasi-elastic domain is not influenced by withdrawal capacity of the fastener, while it shows pronounced influence on load-carrying capacity and the nonlinear shape of the slip curve of the connection at larger deformations. Rope effect strongly depends on fastener properties. High axial resistance of fasteners leads to highly non-linear slip curves and design equations tended to underestimate strength including the rope effect up to a displacement limit of 15 mm. Experimentally observed failure modes were well in line with the theoretical failure modes predicted by the design model. The provided experimental results are motivation for improvement of design models and development of analytical and numerical models that account for nonlinear effects in the complex load transfer mechanism.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik Husbyggnad hsv//swe
ENGINEERING AND TECHNOLOGY Civil Engineering Building Technologies hsv//eng
LANTBRUKSVETENSKAPER Lantbruksvetenskap, skogsbruk och fiske Trävetenskap hsv//swe
AGRICULTURAL SCIENCES Agriculture, Forestry and Fisheries Wood Science hsv//eng
Rope effect; Dowel-type connection; Nonlinear slip; Ductility; Stiffness
Byggteknik
Civil engineering
Byggteknik
Civil engineering

Added entries (persons, corporate bodies, meetings, titles ...)

Bader, Thomas K.,1980-Linnéuniversitetet,Institutionen för byggteknik (BY)(Swepub:lnu)thbaaa (author)
Olsson, Anders,1973-Linnéuniversitetet,Institutionen för byggteknik (BY)(Swepub:lnu)aolbtk (author)
Kajėnasa, SimonasVilnius Gediminas Technical University, Lithuania (author)
Vilnius Gediminas Technical University, LithuaniaInstitutionen för byggteknik (BY) (creator_code:org_t)

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In:Construction and Building Materials: Elsevier228, s. 1-130950-06181879-0526

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