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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Deflection of Two-Way Slabs Subjected to Restrained Volume Change and Transverse Loads
Author(s): K. S. Stephen Tam and Andrew Scanlon
Publication: Journal Proceedings
Appears on pages(s): 737-744
Keywords: concrete slabs; cracking (fracturing); creep properties; deflection;reinforced concrete; shrinkage; two-way slabs.
Abstract:Effects of shrinkage-induced cracking are included in an analytical model for computing immediate deflections of two-way slabs. A simple model for estimating reduction of stiffness in the vicinity of a shrinkage-induced crack is combined with Branson’s effective moment of inertia procedure for slabs subjected to transverse loads to account for the net effect of both restraint cracking and flexural cracking. Results for an example slab illustrate the sensitivity of slab deflections to shrinkage cracking. Calculated deflections are compared with field-measured deflections for a 28-story office building. Recommendations are made to account for shrinkage restraint in slab deflection calculations.
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