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Experimental performance of LVL-concrete composite floor beams

Yeoh, David and Fragiacomo, Massimo and Buchanan, Andy and Deam, Bruce (2010) Experimental performance of LVL-concrete composite floor beams. In: 11th World Conference on Timber Engineering., 20-24 June 2010, Riva del Garda, Trentino, Italy.

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Abstract

This paper reports the outcomes of short-term collapse tests performed on eleven LVL (laminated veneer lumber)-concrete composite floor T-beams. Different variables such as span length (8 and 10 m), connection and concrete type, and design level (well- and under-designed, in terms of connector numbers) were investigated. During the tests, mid-span deflection, connection slips and strains were measured. Connection types investigated include triangular and rectangular (150 mm and 300 mm long) notches cut in the timber and reinforced with a coach screw, and modified toothed metal plates pressed on the edge of the LVL joists. All of the beam specimens were designed using the effective bending stiffness or γ-method, in accordance with Annex B of Eurocode 5. All well-designed beams provided more than 95% composite action even though there were relatively few connectors (e.g. six 300 mm long notches on the 8 m span beam). The beams with 300 mm rectangular notched connection exhibited the best performance, with high stiffness and strength beyond the ultimate limit state load level and, requiring fewer connectors along the beam. The triangular notch was found to be a viable alternative, with more connectors but easier and faster to cut than a rectangular notch. Metal plate connectors provide a practical construction possibility, but the beam stiffness was found to rapidly deteriorate beyond the ultimate limit state load level.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: composite structures; connectors; LVL; timber construction; timber-concrete; wood
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA630-695 Structural engineering (General)
Divisions: Faculty of Civil and Environmental Engineering > Department of Structural and Material Engineering
Depositing User: Prof. Madya Dr David Yeoh Eng Chuan
Date Deposited: 24 Jul 2014 03:54
Last Modified: 12 Sep 2018 08:16
URI: http://eprints.uthm.edu.my/id/eprint/5728
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