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Feb 22, 2016
Long-Term Deflection of Timber-Concrete Composite Beams in Cyclic Humidity Conditions in Bending
Authors: M. Hailu [email protected], R. Shrestha [email protected], and K. Crews [email protected]Author Affiliations
Publication: Composite Construction in Steel and Concrete VII
Abstract
A laboratory investigation to determine the long-term behaviour of timber-concrete composite (TCC) beams was started from August 2010 at the University of Technology, Sydney. The test was conducted on four six-meter-span TCC beams; this paper reports the results to-date for only two beams. The materials used are laminated veneer lumber (LVL) for the joists and 32 MPa concrete for the flanges. From the start of the test (August 2010), the specimens have been under sustained loads of (1.7kPa) whilst the environmental conditions have been cyclically alternated between normal and very humid conditions (typical cycle duration is six to eight weeks) and the temperature remains quasi constant (22 °C). During the test, the mid-span deflection, moisture content of the timber beams and relative humidity of the air are continuously monitored. The investigation is still continuing and this paper reports the results of the experimental investigation for the last two and half years.
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© 2016 American Society of Civil Engineers.
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Published online: Feb 22, 2016
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Center for Built Infrastructure Research, Faculty of Engineering and IT, Univ. of Technology, Sydney, P.O. Box 123, Broadway 2009, NSW, Australia. E-mail: [email protected]
Lecturer, Centre for Built Infrastructure Research, Faculty of Engineering and IT, Univ. of Technology, Sydney, P.O. Box 123, Broadway 2009, NSW, Australia. E-mail: [email protected]
Professor of Structural Engineering, Centre for Built Infrastructure Research, Faculty of Engineering and IT, Univ. of Technology, Sydney, P.O. Box 123, Broadway 2009, NSW, Australia. E-mail: [email protected]
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