Deflections of Reinforced Concrete Slabs

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Title: Deflections of Reinforced Concrete Slabs

Author(s): Musa R. Resheidat

Publication: Special Publication

Volume: 86

Issue:

Appears on pages(s): 407-418

Keywords: computer programs; concrete slabs; cracking (frac-turing); deflection; loads (forces); reinforced concrete; reinforcing steels; serviceability; structural design.

Date: 8/1/1985

Abstract:
The bending moments for any slab subjected to given loads are calculated by means of linear elastic methods. The required area of steel reinforcement can be calculated by using a method of ultimate strength design. Computations of slab deflections are carried out by modeling the moment-deflection relationship into a bilinear curve. This simplified approach considers the influence of reinforcement as well as the material properties of both concrete and steel. Deflections corresponding to the cracking and service loads are easily computed. Comparison with the ACI approach is also made. A computer program is written by the author and coded by FORTRAN 77 to carry out the numerical calculations. It is concluded that this method reflects the actual behavior of reinforced concrete slabs with respect to the estimated cracking and service load deflections.