Deflections of Concrete Slabs Under Construction Loading

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Title: Deflections of Concrete Slabs Under Construction Loading

Author(s): Cameron J. Graham and Andrew Scanlon

Publication: Special Publication

Volume: 86

Issue:

Appears on pages(s): 167-184

Keywords: concrete construction; cracking (fracturing); deflection; flat concrete plates; formwork (construction); loads (forces);multi-story buildings; shoring; structural analysis; two- - . way slabs.

Date: 8/1/1985

Abstract:
The effect of construction loading on deflection of flat plate slabs is investigated. Progressive cracking, as load is incremented to the shored slab, is included in the finite element analysis for instantaneous deflections. Individual creep curves that reflect the loading age of concrete are superimposed to obtain total creep deflections. Overall long-time deflections also include shrinkage effects. Results calculated for a multistory flat plate structure are in good agreement with a set of measured one-year deflections.