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dc.contributor.author
Fink, Gerhard
dc.date.accessioned
2017-09-19T06:59:39Z
dc.date.available
2017-06-11T14:04:27Z
dc.date.available
2017-09-19T06:59:39Z
dc.date.issued
2014-11
dc.identifier.uri
http://hdl.handle.net/20.500.11850/93076
dc.identifier.doi
10.3929/ethz-a-010294974
dc.description.abstract
Glued laminated timber (GLT) is a structural product composed of several layers of timber boards glued together. GLT components have many advantages, such as the larger range of available component dimensions to choose from, the environmental sustainability or the e- cient ratio between weight and load-bearing capacity. Because of that, GLT beams have been established as one of the most important products in timber engineering in the last decades. As a natural grown material, timber properties exhibit higher variability, compared with other building materials. The variability is pronounced not only between dierent structural elements but also within single elements, the latter being highly related to the occurrence of knot clusters. Due to the highly inhomogeneous structure of timber, the prediction of the material properties of GLT beams is aected by large uncertainties. In the presented thesis, the in uence of varying material properties on the load-bearing capacity of GLT beams was investigated. Thus the thesis contributes to develop the quality of GLT beams, in terms of reliability and eciency. Detailed, non-destructive investigations of altogether 400 timber boards were performed. Thereby, dierent strength and stiness related indicators, such as the position and characteristic of knots, or the eigenfrequency, were assessed. Furthermore, non-destructive tensile test were performed to estimate the stiness properties of knot clusters. Out of the investigated timber boards, GLT beams having a precisely-known beam setup were fabricated. As a result, the exact position of each particular timber board (and each particular knot cluster) within the GLT beams was known. Afterwards, bending tests were performed to estimate the load-bearing capacity of these GLT beams. Thereby, the in uence of knot clusters and nger joint connections on the deformation and failure behaviour was investigated. In addition to the experimental investigations, a probabilistic approach for modelling GLT beams (referred to as GLT model ) was developed. Thereby, at rst, timber boards are simulated according to their natural growth characteristics. Afterwards, out of the simulated timber boards, virtual GLT beams are fabricated. Finally, the load-bearing behaviour of these GLT beams is estimated by using a numerical model. To assure the quality of the numerical model, it was validated with the test results. Using the GLT model, the in uence of dierent parameters, such as the position and characteristics of knots, or the quality of nger joint connections, on the load-bearing capacity of GLT beams was investigated. One further goal of this thesis was the investigation of machine-grading indicators, that are measured during the grading process. Therefore, all the investigations presented in this thesis are conducted for indicators measured in laboratory and machine-grading indicators. The same applies for the GLT model, which was also developed for both types of indicators.
en_US
dc.language.iso
en
en_US
dc.publisher
ETH-Zürich
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.subject
Load-bearing capacity
en_US
dc.subject
ZUVERLÄSSIGKEIT (INGENIEURWESEN)
en_US
dc.subject
MULTI-LAYERED WOOD STRUCTURES (TIMBER CONSTRUCTION)
en_US
dc.subject
Structural reliability
en_US
dc.subject
MATERIALS TESTING, MATERIALS PROPERTIES (MATERIALS SCIENCE)
en_US
dc.subject
CALCULATIONS/STRUCTURAL ANALYSIS (CIVIL ENGINEERING)
en_US
dc.subject
MATERIALPRÜFUNG, MATERIALEIGENSCHAFTEN (MATERIALWISSENSCHAFTEN)
en_US
dc.subject
Probabilistic modelling
en_US
dc.subject
MEHRSCHICHTIGE HOLZKONSTRUKTIONEN (HOLZBAU)
en_US
dc.subject
BAUSTATISCHE BERECHNUNG (BAUSTATIK)
en_US
dc.subject
Monte carlo simulations
en_US
dc.subject
TIMBER ENGINEERING (STRUCTURAL ENGINEERING)
en_US
dc.subject
Varying material properties
en_US
dc.subject
RELIABILITY (ENGINEERING)
en_US
dc.subject
Glued laminated timber
en_US
dc.subject
INGENIEURHOLZBAU (KONSTRUKTIVER INGENIEURBAU)
en_US
dc.subject
Censored regression analysis
en_US
dc.title
Influence of varying material properties on the load-bearing capacity of glued laminated timber
en_US
dc.type
Report
dc.rights.license
In Copyright - Non-Commercial Use Permitted
dc.date.published
2014
ethz.journal.title
IBK Bericht
ethz.journal.volume
360
en_US
ethz.size
144 p.
en_US
ethz.code.ddc
6 - Technology, medicine and applied sciences::620 - Engineering & allied operations
en_US
ethz.code.ddc
6 - Technology, medicine and applied sciences::620 - Engineering & allied operations
en_US
ethz.notes
.
en_US
ethz.identifier.nebis
010294974
ethz.publication.place
Zürich
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02605 - Institut für Baustatik u. Konstruktion / Institute of Structural Engineering::03352 - Fontana, Mario / Fontana, Mario
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02605 - Institut für Baustatik u. Konstruktion / Institute of Structural Engineering
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02605 - Institut für Baustatik u. Konstruktion / Institute of Structural Engineering::03352 - Fontana, Mario / Fontana, Mario
ethz.date.deposited
2017-06-11T14:05:19Z
ethz.source
ECOL
ethz.source
ECIT
ethz.identifier.importid
imp59366b6986b2985183
ethz.identifier.importid
imp593652922b83b75579
ethz.ecolpid
eth:47072
ethz.ecitpid
pub:146261
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-18T19:31:51Z
ethz.rosetta.lastUpdated
2017-09-19T06:59:47Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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