Self-camber of timber beams by swelling hardwood inlays for timber–concrete composite elements
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Date
2021-11-15
Publication Type
Journal Article, Journal Article
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yes
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Abstract
Timber–concrete composites (TCC) are smart solutions for slabs in residential and office buildings regarding the sustainable and performance-optimized use of materials. However, a non-negligible disadvantage is the deflection of the timber elements caused by in-situ concrete casting during construction. This paper presents an approach to camber timber elements without external forces by using the innate swelling capacity of wood. Oven-dried hardwood inlays can be inserted transversally into cuts on the top side of a timber element. After an increase of the moisture content in the inlays, the swelling pressure will result in a self-camber of the timber element. In this study, a procedure for prediction of the self-camber is derived and the model is validated using an experimental test series. The results demonstrate that the self-camber of spruce elements using beech inlays is both feasible and predictable. On this basis, practical application scenarios for TCC elements in timber engineering are shown and discussed.
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Publication status
published
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Book title
Journal / series
Volume
308
Pages / Article No.
125024
Publisher
Elsevier
Event
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Self-camber; Timber; Wood swelling; Timber–concrete composite; Swelling pressure; Restrained swelling; Serviceability limit state; European beech
Organisational unit
08809 - Frangi, Andrea (Tit.-Prof.)