Simplified Computations for Effective Moment of Inertia Ie and Minimum Thickness to A

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Simplified Computations for Effective Moment of Inertia Ie and Minimum Thickness to Avoid Deflection Computations

Author: Jacob S. Grossman | Size: 1.51 MB | Format: PDF | Year: 1981 |
Publisher: ACI JOURNAL, Proceedings V. 78, No. 6, Nov.-Dec. 1981, pp. 423-439.

An approximate simplified procedure is described for estimating the effective moment of inertia I, for beams, T-beams, or one-way slabs constructed of normal weight aggregate concrete or lightweight concrete, and reinforced with 40-80 ksi reinforcing bars. The results are compatible with Ie values obtained from Eq. (9-7) of ACI 318-77. The simplified equations do not require computations for moment of inertia of the cracked section Icr, nor the reinforcing requirements initially. Also described is a simplified procedure for establishing minimum member depth so that deflection computations to ascertain serviceability may be avoided when designing the majority of one-way members

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