dc.contributor.advisor |
Quenneville, P |
en |
dc.contributor.author |
Masoudnia, Reza |
en |
dc.date.accessioned |
2018-04-15T22:12:58Z |
en |
dc.date.issued |
2018 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/37062 |
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dc.description.abstract |
A timber composite beam made of a Cross Laminated Timber (CLT) panel is attached to a Laminated Veneer Lumber (LVL) girder. Under positive bending moment, part of the CLT panel act as the flange of the LVL girder that resists compression. When the spacing between the LVL girders becomes large, it is evident that simple beam theory does not adequately apply because compressive stress in the flange will vary with distance from the LVL girder web, the flange being more highly stressed over the web than in the extremities. This phenomenon is termed “shear lag”. For design purposes in steel-concrete composite sections, effective flange width was introduced into national and international design specifications, whereby various effective flange width equations were derived based on different analytical and experimental results. A very detailed numerical model was developed for the timber composite beam that provided the foundation for further parametric investigations. The numerical parametric study is specifically concerned with the effect of wood plank and material properties of the CLT panel on the effective flange width of the timber composite beams. Moreover, effect of the various layers configuration of the CLT panels has been investigated. Also, the effective flange width of the timber composite beams has been explored experimentally and numerically to evaluate the effect of screw shear connections. Shear slips and the effective flange width have been studied for fully and partially composite action between the CLT panel and the LVL beam. In conclusions, the detailed parametric study demonstrated that the section geometry and material properties of timber planks in CLT panel have remarkable structural influence on the effective flange width. The effective flange width increases with any changes that lead to an increase in the ratio of the transverse layer’s depth to the longitudinal layer’s depth. The research also demonstrated that even small increases in effective flange width significantly reduce the material costs. Moreover the research indicates that the number of screw shear connection has a significant influence on the effective flange width and shear slip of the timber composite beams. Finally, based on experimental test result and numerical parametric study, a formula to estimate the effective flange width of the timber composite beams and a series technical recommendation have been recommended to the timber industry. |
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dc.publisher |
ResearchSpace@Auckland |
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dc.relation.ispartof |
PhD Thesis - University of Auckland |
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dc.relation.isreferencedby |
UoA99265060414002091 |
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dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
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dc.title |
Effective Flange Width of Timber Composite Beams Using CLT Slabs |
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dc.type |
Thesis |
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thesis.degree.discipline |
Civil and Environmental Engineering |
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thesis.degree.grantor |
The University of Auckland |
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thesis.degree.level |
Doctoral |
en |
thesis.degree.name |
PhD |
en |
dc.rights.holder |
Copyright: The author |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/OpenAccess |
en |
pubs.elements-id |
736161 |
en |
pubs.record-created-at-source-date |
2018-04-16 |
en |
dc.identifier.wikidata |
Q112937419 |
|