Calculation of Time-Dependent Deflection of Composite Concrete Slabs: Simplified Design Approach
Publication: Practice Periodical on Structural Design and Construction
Volume 20, Issue 1
Abstract
Relatively little research has been reported on the time-dependent in-service behavior of composite concrete slabs with profiled steel decking as permanent formwork, and little guidance is available for calculating long-term deflections. The drying-shrinkage profile through the thickness of a composite slab is greatly affected by the impermeable steel deck at the slab soffit, and this has only recently been quantified. Based on an existing analytical model developed by the authors to calculate the time-dependent deflection of composite slabs, a simplified procedure, suitable for use in structural design, is proposed for calculating the time-dependent deflection of composite concrete slabs with steel decking as permanent formwork that takes into account the time-dependent effects of creep and shrinkage. The method is illustrated by three examples and the results are compared with the experimental data.
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Acknowledgments
The work reported herein has been undertaken with the financial support of the Australian Research Council, decking manufacturer Fielders Australia, and Prestressed Concrete Design Consultants (PCDC). This support is gratefully acknowledged.
References
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Information & Authors
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Published In
Practice Periodical on Structural Design and Construction
Volume 20 • Issue 1 • February 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jul 21, 2013
Accepted: Jan 10, 2014
Published online: Jan 13, 2014
Published in print: Feb 1, 2015
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