Abstract
This paper presents a numerical study on the torsional moment in lateral torsional stability analysis of glued laminated timber girders. A numerical model is developed solving the bending-torsion problem. This numerical model according to second order theory also takes single supports at the upper chord into account,which are typical for wide span girders as roof beams with horizontal bracings in order to reduce the relative slenderness of the girders. The numerical studies on straight parallel-chorded glued laminated beams show, that the torsional stresses on buckling girders are in the range of 4-12% of the allowable shear stresses in cross-section at the end supports considering two different curvatures of imperfection. In practice the torsional moment due to stability analysis on the lateral torsional buckling should be derived in a simple and secure way to be able to verify it against the relatively low shear strength of timber without using a calculation according to second order theory.
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References
Petersen, C.: Statik und Stabilität der Baukonstruktionen. Friedr. Vieweg und Sohn (1980)
Roik, K., Carl, J., Lindner, J.: Biegetorsionsprobleme gerader dünnwandiger Stäbe. Verlag von Wilhelm Ernst und Sohn (1972)
EN 1995-1-1:2004: Eurocode 5: Design of timber structures; Part 1-1: General Common rules and rules for buildings (2004)
Möhler, K., Hemmer, K.: Rechnerischer Nachweis von Spannungen und Verformungen aus Torsion bei einteiligen Vollholz- und Brettschichtholzbauteilen. Holzbau-Statik-Aktuell Folge 2 (1977)
Glos, P., Denzler, J.K.: Kalibrierung der charakteristischen Schubfestigkeitskennwerte für Vollholz in EN 338 entsprechend den Rahmenbedingungen der nationalen Sortiernorm/Technische Universität München, Bericht Nr. 04502 – Forschungsbericht (2004)
Schickhofer, G.: Determination of Shear Strength Values for GLT using Visual and Machine Graded Spruce and Laminations, Paper 34-12-6, CIB-W18-Meeting (August 2001)
Brandner, R., Gehri, E., Bogensperger, T., Schickhofer, G.: Determination of modulus of shear and elasticity of glued laminated timber and related examinations, Paper 40-12-2, CIB-W18-Meeting (August 2007)
Klapp, H., Brüninghoff, H.: Shear strength of glued laminated timber, Paper 38-6-3, CIB-W18-Meeting (August 2005)
Möhler, K.: Strength and long-term behaviour of lumbar and glued-laminated timber under torsion loads, Paper 7-6-1, CIB-W18-Meeting, Februar/März 1977
Görlacher, R., Kürth, J.: Determination of shear modulus, Paper 27-10-1, CIB-W18-Meeting (Juli 1994)
Cyron, G., Sengler, D.: Holzleimbau, Bauen mit Brettschichtholz. Informationsdienst Holz; Düsseldorf; Arbeitsgemeinschaft Holz (1985)
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Hofmann, R., Kuhlmann, U. (2014). Simplified Design of Glued Laminated Timber Girders for the Torsional Moment Caused by Stability Effects. In: Aicher, S., Reinhardt, HW., Garrecht, H. (eds) Materials and Joints in Timber Structures. RILEM Bookseries, vol 9. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-7811-5_73
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DOI: https://doi.org/10.1007/978-94-007-7811-5_73
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-007-7810-8
Online ISBN: 978-94-007-7811-5
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