Title:
Long-Term Behavior of Continuous Composite Concrete Slabs with Steel Decking
Author(s):
Alireza Gholamhoseini, R. Ian Gilbert, and Mark Bradford
Publication:
Structural Journal
Volume:
115
Issue:
2
Appears on pages(s):
439-449
Keywords:
continuous composite slabs; creep; deflection; profiled steel decking; shrinkage
DOI:
10.14359/51701133
Date:
3/1/2018
Abstract:
Relatively little research has been reported on the time-dependent in-service behavior of continuous 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. This paper presents the results of long-term laboratory tests on continuous composite slabs subjected to both drying shrinkage and different levels of sustained load. It provides experimental evidence of the dominant role played by drying shrinkage in the long-term deflection and redistribution of internal actions in continuous composite slabs. An analytical procedure for determination of the time-dependent deflections in continuous composite slabs is described and the results of analyses are presented and compared with the test data.
Related References:
1. Gholamhoseini, A.; Gilbert, R. I.; Bradford, M. A.; and Chang, Z. T., “Time-Dependent Deflection of Composite Concrete Slabs,” ACI Structural Journal, V. 111, No. 4, July-Aug. 2014, pp. 765-776.
2. Gilbert, R. I.; Bradford, M. A.; Gholamhoseini, A.; and Chang, Z. T., “Effects of Shrinkage on the Long-Term Stresses and Deformations of Composite Concrete Slabs,” Engineering Structures Journal, V. 40, pp. 9-19.
3. Ranzi, G.; Ambrogi, L.; Al-Deen, S.; and Uy, B., “Long-Term Experiments of Post-Tensioned Composite Slabs,” 10th International Conference on Advances in Steel Concrete Composite and Hybrid Structures, Research Publishing, July 2012, Singapore, pp. 477-484.
4. Gilbert, R. I., and Ranzi, G., Time-Dependent Behaviour of Concrete Structures, Spon Press, London, UK, 2011, 426 pp.
5. Fielders Australia Pty Ltd., “Specifying Fielders-KingFlor; Composite Steel Formwork System Design Manual.”
6. ACI Committee 209, “Guide for Modeling and Calculating Shrinkage and Creep in Hardened Concrete (ACI 209.2R-08),” American Concrete Institute, Farmington Hills, MI, 2008.
7. British Standards Institution, “Eurocode 2: Design of Concrete Structures—Part 1-1: General Rules and Rules for Buildings (BS EN 1992-1-1:2004),” European Committee for Standardization, Brussels, Belgium, 2004.